Jan Erik Madsen

• Alm, Carl Erik; Karlsten, Anders; Madsen, Jan Erik; Nordsletten, Lars; Brattgjerd, Jan Egil & Pripp, Are Hugo [Show all 8 contributors for this article] (2024). No benefit of the trochanteric stabilizing plate on loss of fracture reduction in AO/OTA 31-A2 trochanteric fractures a randomized controlled trial using radiostereometric analysis. Bone & Joint Open (BJO). ISSN 2633-1462. 5(1), p. 37–45. doi: 10.1302/2633-1462.51.BJO-2023-0082.R1.
• Saatvedt, Ola; Økelsrud Riiser, Martin; Frihagen, Frede ; Figved, Wender; Madsen, Jan Erik & Molund, Marius [Show all 7 contributors for this article] (2024). Non-operative versus operative treatment of suprasyndesmotic ankle fractures: Protocol for a prospective, multicentre, randomised controlled trial. BMJ Open. ISSN 2044-6055. 14(1). doi: 10.1136/bmjopen-2023-075122.
• Kirkebø, Ragnhild Loven; Nordsletten, Lars; Madsen, Jan Erik; Dybvik, Eva Hansen; Lie, Stein Atle & Hallan, Geir [Show all 7 contributors for this article] (2023). Long-term follow-up and survival of delayed total hip arthroplasty following acetabular fracture: a matched cohort study of 552 cases from the Norwegian Arthroplasty Register. HIP International. ISSN 1120-7000. doi: 10.1177/11207000231212884. Full text in Research Archive
• Stake, Ingrid Kvello; Bryniarski, Anna R.; Brady, Alex W.; Miles, Jon W.; Dornan, Grant J. & Madsen, Jan Erik [Show all 9 contributors for this article] (2023). Effect of Posterior Malleolar Fixation on Syndesmotic Stability. American Journal of Sports Medicine. ISSN 0363-5465. 51(4), p. 997–1006. doi: 10.1177/03635465231151448.
• Hassellund, Sondre Stafsnes; Oftebro, Ingrid; Williksen, John Håkon; Søreide, Endre; Madsen, Jan Erik & Frihagen, Frede (2023). Closed reduction of dorsally displaced distal radius fractures in the elderly provided improved final radiographic results. Journal of Orthopaedic Surgery and Research. ISSN 1749-799X. 18(1). doi: 10.1186/s13018-023-03733-5. Full text in Research Archive
• Stake, Ingrid Kvello; Ræder, Lise Benedikte Wendt; Gregersen, Martin; Molund, Marius; Wang, Johan & Madsen, Jan Erik [Show all 7 contributors for this article] (2023). Higher complication rate after nail compared with plate fixation of ankle fractures in patients aged 60 years or older: a prospective, randomized controlled trial. The Bone & Joint Journal. ISSN 2049-4394. 105-B(1), p. 72–81. doi: 10.1302/0301-620X.105B1.BJJ-2022-0595.R1.
• Grün, Wolfram; Hansen, Emilie Johannah Jellum; Andreassen, Geir; Clarke-Jenssen, John & Madsen, Jan Erik (2022). Functional outcomes and health-related quality of life after reconstruction of segmental bone loss in femur and tibia using the induced membrane technique. Archives of Orthopaedic and Trauma Surgery. ISSN 0936-8051. p. 1–10. doi: 10.1007/s00402-022-04714-9. Full text in Research Archive
• Rosenlund, Anne-Mari; Søreide, Endre; Madsen, Jan Erik; Flugsrud, Gunnar B; Douglass, Brenton W. & Midtgaard, Kaare Sourin (2022). and internal fixation of distal humeral fractures with precontoured locking plates. OTA International. ISSN 2574-2167. p. 1–7. doi: 10.1097/OI9.0000000000000220.
• Bjørdal, Jonas; Fraser, Alexander Nilsskog; Wagle, Tone; Kleven, Linn; Lien, Odd Arve & Eilertsen, Lars [Show all 11 contributors for this article] (2022). A cost-effectiveness analysis of reverse total shoulder arthroplasty compared with locking plates in the management of displaced proximal humerus fractures in the elderly: the DelPhi trial. Journal of shoulder and elbow surgery. ISSN 1058-2746. 31(10), p. 2187–2195. doi: 10.1016/j.jse.2022.05.022. Show summary

  Aim: To evaluate the cost-effectiveness of surgical treatment with reversed total shoulder arthroplasty (RTSA) compared to open reduction and internal fixation (ORIF) with a locking plate for patients 65-85 years old with a displaced proximal humerus fracture. Methods: A cost-utility analysis (CUA) was conducted alongside a multicenter randomized controlled trial, taking a health care perspective. A total of 124 patients with displaced proximal humerus fractures were randomized to treatment with RTSA (n=64) or ORIF (n=60) during a two-year period. The outcome measure was quality-adjusted life years (QALYs) derived from the generic questionnaire 15D in an intention to treat population. The results were expressed as incremental cost-effectiveness ratios (ICERs), and a probabilistic sensitivity analysis was done to account for uncertainty in the analysis. Results: At 2 years, 104 patients were eligible for analyses. The mean QALY in the RTSA group was 1.24 (95% CI 1.21-1.28) and 1.26 (95% CI 1.22-1.30) in the ORIF group. The mean cost was higher in the RTSA group with mean cost of 36.755 € (€ 17 654 - € 55 855) compared to 31.953 € (€ 16 226 - € 47 279) in the ORIF group. Using ICER, ORIF was the dominant treatment. When using a probabilistic sensitivity analysis with 1000 replications, the plots were centered around origo. This indicates that there is no significant difference in cost or effect. Conclusion: In the cost-utility analysis of treatment of displaced proximal humeral fractures, there were no difference between RTSA and ORIF.

• Bønes, Ingrid; Karlberg, Anna Cecilia; Liljeholm, Maria Elisabeth; Fraser, Alexander Nilsskog; Madsen, Jan Erik & Fjalestad, Tore (2022). Pegs not superior to screws for fixation of fractures of the proximal humerus. Journal of Orthopaedic Surgery and Research. ISSN 1749-799X. 17(1). doi: 10.1186/s13018-022-02947-3. Full text in Research Archive
• Eikrem, Morten; Brannsten, Hege; Bjørkøy, Dagfinn; Lian, Tom; Madsen, Jan Erik & Figved, Wender (2021). Volar Locking Plate Versus Dorsal Locking Nail-Plate Fixation for Dorsally Displaced Unstable Extra-Articular Distal Radial Fractures: Functional and Radiographic Results from a Randomized Controlled Trial. JBJS Open Access. ISSN 2472-7245. 6(4), p. 1–11. doi: 10.2106/JBJS.OA.21.00068. Full text in Research Archive Show summary

  Background: The use of low-profile dorsal and volar locking plates for distal radial fracture surgery has improved results and lowered the complication rate compared with older plate designs. The purpose of the present randomized controlled trial was to compare patient-reported outcomes as well as radiographic and functional results between patients who underwent stabilization with a volar locking plate or a dorsal locking nail-plate for the treatment of dorsally displaced unstable extra-articular distal radial fractures. Methods: One hundred and twenty patients ≥55 years of age were randomized to surgery with either a volar locking plate or a dorsal locking nail-plate and were assessed at 2 weeks, 6 weeks, 3 months, 6 months, and 1 year. The primary outcome was the abbreviated version of the Disabilities of the Arm, Shoulder and Hand (QuickDASH) score. Secondary outcomes were the Patient-Rated Wrist Evaluation (PRWE), EuroQol 5 Dimensions (EQ-5D) index and visual analog scale (VAS), range of motion, grip strength, radiographic measurements, and complication rate. Results: The median age was 66 years (range, 55 to 88 years). The rate of follow-up was 97%. There was no clinically important difference between the groups at any point during follow-up. Patients in the volar locking plate group had better mean QuickDASH scores at 6 weeks, 6 months, and 1 year. However, the differences were small (5.8 vs. 11.3 points at 1 year; mean difference, −5.5 points [95% confidence interval (CI), −9.9 to 1.2]; p = 0.014), which is lower than any proposed minimum clinically important difference (MCID). The difference in PRWE scores was also lower than the MCID (1.0 vs. 3.5 at 1 year; mean difference, −2.5 [95% CI, −4.4 to 0.6]; p = 0.012). The dorsal locking nail-plate group had slightly better restoration of volar tilt (p = 0.011). EQ-5D index, EQ-5D VAS, range of motion, grip strength, and complication rates were similar. Conclusions: We found no clinically relevant difference between the volar locking plate and dorsal locking nail-plate groups after 1 year or in the time period up to 1 year. A dorsal locking nail-plate can therefore be an alternative method for the treatment of these unstable fractures or in cases in which a dorsal approach is preferable over a volar approach.

• Hassellund, Sondre Stafsnes; Zolic-Karlsson, Zinajda; Williksen, John Håkon; Husby, Torstein; Madsen, Jan Erik & Frihagen, Frede (2021). Surgical treatment is not cost-effective compared to nonoperative treatment for displaced distal radius fractures in patients 65 years and over. Bone & Joint Open (BJO). ISSN 2633-1462. 2(12), p. 1027–1034. doi: 10.1302/2633-1462.212.BJO-2021-0108.R1. Full text in Research Archive
• Hassellund, Sondre Stafsnes; Williksen, John Håkon; Mjelde, Marit; Pripp, Are Hugo; Rosales, Carina & Karlsen, Øystein Espeland [Show all 8 contributors for this article] (2021). Infographic: Cast immobilization is non-inferior to volar locking plates in relation to QuickDASH after one year in patients aged 65 years and older: a randomized controlled trial of displaced distal radius fractures. . The Bone & Joint Journal. ISSN 2049-4394. 103-B(2), p. 245–246. doi: 10.1302/0301-620X.103B2.BJJ-2020-2562.
• Stake, Ingrid Kvello; Brady, Alex; Bryniarski, Anna; Dornan, Grant; Madsen, Jan Erik & Engebretsen, Lars [Show all 8 contributors for this article] (2021). The impact of posterior malleolar fixation on syndesmotic stability. In Hansen, Ann Kristin (Eds.), Høstmøteboka 2021. Norsk Ortopedisk Forening. ISSN 978-82-994275-3-1.
• Midtgaard, Kaare Sourin; Frihagen, Frede ; Dornan, Grant J.; Coucheron, Marius; Fossåen, Carina Lavransdatter & Grundel, Dag [Show all 12 contributors for this article] (2021). Predicting secondary surgery after operative fixation of olecranon fractures: a model using data from 800 patients. JSES International. 5(5), p. 948–953. doi: 10.1016/j.jseint.2021.04.014. Full text in Research Archive Show summary

  Background: High rates of secondary surgery after fixation of olecranon fractures have been reported. Identification of risk factors can aid surgeons to reduce complications leading to additional surgical procedures. Methods: Olecranon fractures treated at seven hospitals from 2007 to 2017 were identified, and the radiographs were classified. Isolated, displaced olecranon fractures treated operatively with tension band wiring (TBW) or precontoured plate fixation (PF) were reviewed. Adjusted risk factors for secondary surgery were analyzed, and a multivariable predictive model for secondary surgery was built. Results: After the initial review of 1259 olecranon fractures, 800 isolated, displaced olecranon fractures met the inclusion and exclusion criteria. The distribution of two-part and multifragmented fractures was equal. TBW was used in 636 patients and PF in 164 patients. Multifragmentation was a significant variable influencing preference for PF. Secondary surgery was performed in 41% patients and symptomatic hardware removal was the most frequent primary indication. In both the TBW and PF group, the rates of major complications leading to secondary surgery were 13% (P = .96). The adjusted risk of secondary surgery was lower with increasing age (odds ratio by 10 years increments, 0.74; 95% confidence interval, 0.68-0.80, P < .01). Compared with PF, TBW with transcortical K-wires (odds ratio, 2.06; 95% confidence interval, 1.36-3.14; P < .01) and TBW with intramedullary K-wires (odds ratio, 4.32; 95% confidence interval, 2.16-8.86, P < .01) had significantly higher adjusted risk of secondary surgery. Conclusion Surgeons preferred to use PF in younger patients and multifragmented fractures. Patients should be counseled that secondary surgery is common after surgical fixation of olecranon fractures. Symptomatic hardware removal was the most frequently reported reason for secondary surgery and more frequent after TBW. When using TBW, intramedullary K-wire positioning should be avoided. The rate of major complications leading to secondary surgery was similar in the TBW and PF groups. Overall, the risk of subsequent secondary surgery was higher in younger patients and patients treated with TBW.

• Ræder, Lise Benedikte Wendt; Andersen, Mette Renate; Madsen, Jan Erik; Jacobsen, Silje Berild; Frihagen, Frede & Figved, Wender (2021). Prognostic value of the Haraguchi classification in posterior malleolar fractures in A0 44-C type ankle fractures. Injury. ISSN 0020-1383. 52(10), p. 3150–3155. doi: 10.1016/j.injury.2021.07.038.
• Alm, Carl Erik; Gjertsen, Jan-Erik; Basso, Trude; Matre, Kjell; Röhrl, Stephan Maximillian & Madsen, Jan Erik [Show all 7 contributors for this article] (2021). Trochanteric stabilizing plate in the treatment of trochanteric fractures: a scoping review. Acta Orthopaedica. ISSN 1745-3674. 92, p. 1–6. doi: 10.1080/17453674.2021.1954305. Full text in Research Archive Show summary

  Background and purpose — The trochanteric stabilizing plate (TSP) may be used as an adjunct to a sliding hip screw (SHS) in the treatment of trochanteric fractures to increase construct stability. We performed a scoping review of the literature to clarify when and how the TSP may be useful. Methods — A systematic search was performed in 5 databases and followed by a backwards-and-forwards citation search of the identified papers. 24 studies were included. Results — 6 biomechanical studies and 18 clinical studies were included in the review. The studies presented mainly low-level evidence. All studies were on unstable trochanteric fractures or fracture models. Due to the heterogeneity of methods and reporting, we were not able to perform a meta-analysis. In the biomechanical trials, the TSP appeared to increase stability compared with SHS alone, up to a level comparable with intramedullary nails (IMNs). We identified 1,091 clinical cases in the literature where a TSP had been used. There were 82 (8%) reoperations. The rate of complications and reoperations for SHS plus TSP was similar to previous reports on SHS alone and IMN. It was not possible to conclude whether the TSP gave better clinical results, when compared with either SHS alone or with IMN. Interpretation — The heterogeneity of methods and reporting precluded any clear recommendations on when to use the TSP, or if it should be used at all.

• Fraser, Alexander Nilsskog; Bøe, Berte Marie Grimsmo; Fjalestad, Tore; Madsen, Jan Erik & Röhrl, Stephan Maximillian (2021). Stable glenoid component of reverse total shoulder arthroplasty at 2 years as measured with model-based radiostereometric analysis (RSA). Acta Orthopaedica. ISSN 1745-3674. 92(6), p. 644–650. doi: 10.1080/17453674.2021.1943932. Full text in Research Archive
• Tallay, Elias; Lindberg, Sondre K.; Lee-Ødegård, Sindre; Bjordal, Jonas; Fraser, Alexander Nilsskog & Madsen, Jan Erik [Show all 7 contributors for this article] (2021). External validity in a multicenter randomized clinical trial of proximal humeral fractures: the DelPhi trial. European Journal of Orthopaedic Surgery & Traumatology (EJOST). ISSN 1633-8065. doi: 10.1007/s00590-021-02982-6.
• Stødle, Are H.; Hvaal, Kjetil H.; Brøgger, Helga Maria; Madsen, Jan Erik & Husebye, Elisabeth Ellingsen (2021). Outcome after nonoperative treatment of stable Lisfranc injuries. A prospective cohort study. Foot and Ankle Surgery. ISSN 1268-7731. p. 1–6. doi: 10.1016/j.fas.2021.03.017. Full text in Research Archive
• Sundet, Mads; Mulima, Gift; Kajombo, Chifundo; Gjerde, Hallvard; Christophersen, Asbjørg S. & Madsen, Jan Erik [Show all 7 contributors for this article] (2021). Geographical mapping of road traffic injuries in Lilongwe, Malawi. Injury. ISSN 0020-1383. 52(4), p. 806–813. doi: 10.1016/j.injury.2021.02.028. Full text in Research Archive
• Alm, Carl Erik; Frihagen, Frede ; Dybvik, Eva Hansen; Matre, Kjell; Madsen, Jan Erik & Gjertsen, Jan-Erik (2021). Implants for trochanteric fractures in Norway: the role of the trochanteric stabilizing plate—a study on 20,902 fractures from the Norwegian hip fracture register 2011–2017. Journal of Orthopaedic Surgery and Research. ISSN 1749-799X. 16, p. 1–8. doi: 10.1186/s13018-020-02163-x. Full text in Research Archive
• Hassellund, Sondre Stafsnes; Williksen, John Håkon; Mjelde Laane, Marit; Pripp, Are Hugo; Rosales, Carina & Karlsen, Øyvind [Show all 8 contributors for this article] (2021). Cast immobilization is non-inferior to volar locking plates in relation to QuickDASH after one year in patients aged 65 years and older: a randomized controlled trial of displaced distal radius fractures. The Bone & Joint Journal. ISSN 2049-4394. 103-B(2), p. 247–255. doi: 10.1302/0301-620X.103B2.BJJ-2020-0192.R2.
• Stødle, Are Haukåen; Hvaal, Kjetil; Brøgger, Helga Maria; Madsen, Jan Erik & Husebye, Elisabeth Ellingsen (2020). Temporary Bridge Plating vs Primary Arthrodesis of the First Tarsometatarsal Joint in Lisfranc Injuries: Randomized Controlled Trial. Foot & ankle international. ISSN 1071-1007. 41(8), p. 901–910. doi: 10.1177/1071100720925815. Full text in Research Archive
• Svenøy, Stian; Watne, Leiv; Hestnes, Ingvild; WESTBERG, MARIANNE; Madsen, Jan Erik & Frihagen, Frede Jon (2020). Results after introduction of a hip fracture care pathway: comparison with usual care. Acta Orthopaedica. ISSN 1745-3674. 91(2), p. 139–145. doi: 10.1080/17453674.2019.1710804.
• Ræder, Lise Benedikte Wendt; Stake, Ingrid Kvello; Madsen, Jan Erik; Frihagen, Frede Jon; Jacobsen, Silje Berild & Andersen, Mette Renate [Show all 7 contributors for this article] (2020). Randomized trial comparing suture button with single 3.5 mm syndesmotic screw for ankle syndesmosis injury: similar results at 2 years. Acta Orthopaedica. ISSN 1745-3674. 91. doi: 10.1080/17453674.2020.1818175. Full text in Research Archive
• Frihagen, Frede Jon; Madsen, Jan Erik; Sundfeldt, Mikael; Flugsrud, Gunnar B; Andreassen, Joakim S. & Andersen, Mette Renate [Show all 7 contributors for this article] (2020). Taylor spatial frame or reamed intramedullary nailing for closed fractures of the tibial shaft: A randomized controlled trial. Journal of Orthopaedic Trauma. ISSN 0890-5339. 34(11), p. 612–619. doi: 10.1097/BOT.0000000000001802.
• Midtgaard, Kaare Sourin; Søreide, Endre; Brattgjerd, Jan Egil; Moatshe, Gilbert; Madsen, Jan Erik & Flugsrud, Gunnar B (2020). Biomechanical comparison of tension band wiring and plate fixation with locking screws in transverse olecranon fractures. Journal of shoulder and elbow surgery. ISSN 1058-2746. 29(6), p. 1242–1248. doi: 10.1016/j.jse.2020.01.079. Full text in Research Archive Show summary

  Background: Tension band wiring (TBW) is the standard method for treating transverse olecranon fractures, but high rates of complications and reoperations have been reported. Plate fixation (PF) with locking screws has been introduced as an alternative method that may retain the fracture reduction better with a higher load to failure. Methods: Twenty paired cadaveric elbows were used. All soft tissues except for the triceps tendon were removed. A standardized transverse fracture was created, and each pair was allocated randomly to TBW or PF with locking screws. The triceps tendon was mounted to the materials testing machine with the elbow in 90° of flexion. Construct stiffness was compared 3 times. Then, the elbows underwent a chair lift-off test by loading the triceps tendon to 300 N for 500 cycles. Finally, a load-to-failure test was performed, and failure mechanism was recorded. Results: The construct stiffness of PF was higher in the first of 3 measurements. No difference was observed in the cyclic test or in load to failure. Hardware failure was the failure mechanism in 8 of 10 TBW constructs, and all failures occurred directly under the twists of the metal wire. Hardware failure was the cause of failure in only 1 elbow in the PF group (P < .01). Conclusion: There was no difference in fracture displacement following fixation with TBW and PF with locking screws in transverse olecranon fractures. However, assessment of the mode of hardware failure identified the metal cerclage twist as the weakest link in the TBW construct.

• Ræder, Lise Benedikte Wendt; Figved, Wender; Madsen, Jan Erik; Frihagen, Frede Jon; Jacobsen, Silje Berild & Andersen, Mette Renate (2020). Better outcome for suture button compared with single syndesmotic screw for syndesmosis injury: Five-year results of a randomized controlled trial. The Bone & Joint Journal. ISSN 2049-4394. 102-B(2), p. 212–219. doi: 10.1302/0301-620X.102B2.BJJ-2019-0692.R2.
• Fraser, Alexander Nilsskog; Bjørdal, Jonas; Wagle, Tone; Karlberg, Anna Cecilia; Lien, Odd Arve & Eilertsen, Lars [Show all 11 contributors for this article] (2020). Reverse shoulder arthroplasty is superior to plate fixation at 2 years for displaced proximal humeral fractures in the elderly: a multicenter randomized controlled trial. Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. 102(6), p. 477–485. doi: 10.2106/JBJS.19.01071. Full text in Research Archive Show summary

  Almost one-third of patients with proximal humeral fractures are treated surgically, and the number is increasing. When surgical treatment is chosen, there is sparse evidence on the optimum method. The DelPhi (Delta prosthesis-PHILOS plate) trial is a clinical trial comparing 2 surgical treatments. Our hypothesis was that reverse total shoulder arthroplasty (TSA) yields better clinical results compared with open reduction and internal fixation (ORIF) using an angular stable plate. The DelPhi trial is a randomized controlled trial comparing reverse TSA with ORIF for displaced proximal humeral fractures (OTA/AO types 11-B2 and 11-C2) in elderly patients (65 to 85 years of age). The primary outcome measure was the Constant score at a 2-year follow-up. The secondary outcome measures included the Oxford Shoulder Score and radiographic evaluation. Results were reported as the mean difference with 95% confidence interval (CI). The intention-to-treat principle was applied for crossover patients. There were 124 patients included in the study. At 2 years, the mean Constant score was 68.0 points (95% CI, 63.7 to 72.4 points) for the reverse TSA group compared with 54.6 points (95% CI, 48.5 to 60.7 points) for the ORIF group, resulting in a significant mean difference of 13.4 points (95% CI, 6.2 to 20.6 points; p < 0.001) in favor of reverse TSA. When stratified for fracture classification, the mean score was 69.3 points (95% CI, 63.9 to 74.7 points) for the reverse TSA group and 50.6 points (95% CI, 41.9 to 59.2 points) for the ORIF group for type-C2 fractures, which yielded a significant mean difference of 18.7 points (95% CI, 9.3 to 28.2 points; p < 0.001). In the type-B2 fracture group, the mean score was 66.2 points (95% CI, 58.6 to 73.8 points) for the reverse TSA group and 58.5 points (95% CI, 49.6 to 67.4 points) for the ORIF group, resulting in a nonsignificant mean difference of 7.6 points (95% CI, -3.8 to 19.1 points; p = 0.19). At a 2-year follow-up, the data suggested an advantage of reverse TSA over ORIF in the treatment of displaced OTA/AO type-B2 and C2 proximal humeral fractures in elderly patients.

• Hjorthaug, Geir Aasmund; Søreide, Endre; Nordsletten, Lars; Madsen, Jan Erik; Reinholt, Finn P. & Niratisairak, Sanyalak [Show all 7 contributors for this article] (2019). Short-term perioperative parecoxib is not detrimental to shaft fracture healing in a rat model. Bone and Joint Research. ISSN 2046-3758. 8(10), p. 472–480. doi: 10.1302/2046-3758.810.BJR-2018-0341.R1.
• Reimer, Lisa Cecilie; Jakobsen, Stig; Mortensen, Louise; Dalgas, Ulrik; Jacobsen, Julie Sandell & Søballe, Kjeld [Show all 11 contributors for this article] (2019). Efficacy of periacetabular osteotomy followed by progressive resistance training compared to progressive resistance training as non-surgical treatment in patients with hip dysplasia (PreserveHip) - a protocol for a randomised controlled trial. BMJ Open. ISSN 2044-6055. 9(12), p. 1–8. doi: 10.1136/bmjopen-2019-032782. Full text in Research Archive
• Andersen, Mette Renate; Diep, Lien My; Frihagen, Jon Frede; Hellund, Johan Castberg; Madsen, Jan Erik & Figved, Paul Wender (2019). Importance of Syndesmotic Reduction on Clinical Outcome After Syndesmosis Injuries. Journal of Orthopaedic Trauma. ISSN 0890-5339. 33(8), p. 397–403. doi: 10.1097/BOT.0000000000001485.
• Stødle, Are Haukåen; Hvaal, Kjetil; Enger, Martine Merete; Brøgger, Helga Maria; Madsen, Jan Erik & Husebye, Inger Elisabeth Ellingsen (2019). Lisfranc injuries: Incidence, mechanisms of injury and predictors of instability. Foot and Ankle Surgery. ISSN 1268-7731. doi: 10.1016/j.fas.2019.06.002. Full text in Research Archive
• Frisvoll, Cassandra; Clarke-Jenssen, John; Madsen, Jan Erik; Flugsrud, Gunnar B; Frihagen, Frede Jon & Andreassen, Geir [Show all 7 contributors for this article] (2019). Long-term outcomes after high-energy open tibial fractures: Is a salvaged limb superior to prosthesis in terms of physical function and quality of life? European Journal of Orthopaedic Surgery & Traumatology (EJOST). ISSN 1633-8065. 29(4), p. 899–906. doi: 10.1007/s00590-019-02382-x.
• Hammer, Ola-Lars; Clementsen, Ståle; Hast, Joakim Aasli; Saltyte Benth, Jurate; Madsen, Jan Erik & Randsborg, Per-Henrik (2019). Volar Locking Plates Versus Augmented External Fixation of Intra-Articular Distal Radial Fractures - Functional Results from a Randomized Controlled Trial. Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. 101(4), p. 311–321. doi: 10.2106/JBJS.18.00014.
• Isaksen, Kjetil; Roscher, Elin K.; Iversen, Kjetil S.; Eitzen, Ingrid; Clarke-Jenssen, John & Nordsletten, Lars [Show all 7 contributors for this article] (2018). Preoperative incipient osteoarthritis predicts failure after periacetabular osteotomy: 69 hips operated through the anterior intrapelvic approach. HIP International. ISSN 1120-7000. doi: 10.1177/1120700018804786.
• Lundgreen, Kirsten; Madsen, Jan Erik; KVAKESTAD, RUNE; Dimmen, Sigbjørn & Jenssen, Kjersti Kaul (2018). Prognostic Factors for Functional Outcome After Rotator Cuff Repair: A Prospective Cohort Study With 2-Year Follow-up. American Journal of Sports Medicine. ISSN 0363-5465. 46(14), p. 3463–3470. doi: 10.1177/0363546518803331.
• Jenssen, Kjersti Kaul; Lundgreen, Kirsten; Madsen, Jan Erik; Kvakestad, Rune; Pripp, Are Hugo & Dimmen, Sigbjørn (2018). No functional difference between three and six weeks of immobilization after arthroscopic rotator cuff repair: A Prospective randomized controlled non-inferiority trial. Arthroscopy: The Journal of Arthroscopy And Related. ISSN 0749-8063. 34(10), p. 2765–2774. doi: 10.1016/j.arthro.2018.05.036.
• ANDERSEN, METTE RENATE; Frihagen, Frede Jon; Hellund, Johan Castberg; Madsen, Jan Erik & Figved, Wender (2018). Randomized trial comparing suture button with single syndesmotic screw for syndesmosis injury. Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. 100(1), p. 2–12. doi: 10.2106/JBJS.16.01011.
• Fraser, Alexander Nilsskog; Tsukanaka, Masako; Fjalestad, Tore; Madsen, Jan Erik & Röhrl, Stephan Maximillian (2018). Model-based RSA is suitable for clinical trials on the glenoid component of reverse total shoulder arthroplasty. Journal of Orthopaedic Research. ISSN 0736-0266. 36(12), p. 3299–3307. doi: 10.1002/jor.24111.
• Hjorthaug, Geir Aasmund; Søreide, Endre; Nordsletten, Lars; Madsen, Jan Erik; Reinholt, Finn P. & Niratisairak, Sanyalak [Show all 7 contributors for this article] (2018). Negative effect of zoledronic acid on tendon-to-bone healing: In vivo study of biomechanics and bone remodeling in a rat model. Acta Orthopaedica. ISSN 1745-3674. 89(3), p. 360–366. doi: 10.1080/17453674.2018.1440189. Full text in Research Archive
• Clarke-Jenssen, John; Westberg, Marianne; Røise, Olav; Storeggen, Stein Arne Øvre; Bere, Tone Tufte & Silberg, Inger Elisabeth [Show all 7 contributors for this article] (2017). Reduced survival for uncemented compared to cemented total hip arthroplasty after operatively treated acetabular fractures. Injury. ISSN 0020-1383. 48(11), p. 2534–2539. doi: 10.1016/j.injury.2017.08.071. Full text in Research Archive
• Nerhus, Tor Kjetil; Ekeland, Arne Erling; Solberg, Geir; Olsen, Birgitte Holt; Madsen, Jan Erik & Heir, Stig (2017). No difference in time-dependent improvement in functional outcome following closing wedge versus opening wedge high tibial osteotomy. The Bone & Joint Journal. ISSN 2049-4394. 99B(9), p. 1157–1166. doi: 10.1302/0301-620X.99B9.BJJ-2017-0062.R1.
• Jenssen, Kjersti Kaul; Lundgreen, Kirsten; Madsen, Jan Erik & Dimmen, Sigbjørn (2017). Targeted intervention of acute postoperative infection after rotator cuff repair results in good functional outcomes. Knee Surgery, Sports Traumatology, Arthroscopy. ISSN 0942-2056. 26(1), p. 285–291. doi: 10.1007/s00167-017-4743-z.
• Svenøy, Stian; WESTBERG, MARIANNE; Figved, Wender; Valland, Haldor; Brun, Ole-Christian Laahne & Wangen, Helge [Show all 8 contributors for this article] (2017). Posterior versus lateral approach for hemiarthroplasty after femoral neck fracture: Early complications in a prospective cohort of 583 patients. Injury. ISSN 0020-1383. 48(7), p. 1565–1569. doi: 10.1016/j.injury.2017.03.024.
• Clarke-Jenssen, John; Røise, Olav; Øvre, Stein A. & Madsen, Jan Erik (2017). Long-term survival and risk factors for failure of the native hip joint after operatively treated displaced acetabular fractures. The Bone & Joint Journal. ISSN 2049-4394. 99B(6), p. 834–840. doi: 10.1302/0301-620X.99B6.BJJ-2016-1013.R1. Full text in Research Archive
• Gaski, Iver Anders; Barckman, Jeppe; Næss, Pål Aksel; Skaga, Nils Oddvar; Madsen, Jan Erik & Kløw, Nils-Einar [Show all 8 contributors for this article] (2016). Reduced need for extraperitoneal pelvic packing for severe pelvic fractures is associated with improved resuscitation strategies. Journal of Trauma and Acute Care Surgery. ISSN 2163-0755. 81(4), p. 644–651. doi: 10.1097/TA.0000000000001139.
• Clarke-Jenssen, John; Wikerøy, Annette Konstanse Bordewich; Røise, Olav; Øvre, Stein A. & Madsen, Jan Erik (2016). Long-term survival of the native hip after a minimally displaced, nonoperatively treated acetabular fracture. Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. 98(16), p. 1392–1399. doi: 10.2106/JBJS.15.01154.
• Adelved, Aron; Töttermann, Anna; Glott, Thomas; Hellund, Johan Castberg; Madsen, Jan Erik & Røise, Olav (2016). Long-term functional outcome after traumatic lumbosacral dissociation. A retrospective case series of 13 patients. Injury. ISSN 0020-1383. 47(7), p. 1562–1568. doi: 10.1016/j.injury.2016.04.006.
• Stake, Ingrid Kvello; Madsen, Jan Erik; Hvaal, Kjetil; Johnsen, Elena & Husebye, Elisabeth Ellingsen (2016). Surgically treated talar fractures. A retrospective study of 50 patients. Foot and Ankle Surgery. ISSN 1268-7731. 22(2), p. 85–90. doi: 10.1016/j.fas.2015.05.005.
• ANDERSEN, METTE RENATE; Frihagen, Frede Jon; Madsen, Jan Erik & Figved, Wender (2015). High complication rate after syndesmotic screw removal. Injury. ISSN 0020-1383. 46(11), p. 2283–2287. doi: 10.1016/j.injury.2015.08.021.
• Nerhus, Tor Kjetil; Ekeland, Arne Erling; Solberg, Geir; Sivertsen, Einar Andreas; Madsen, Jan Erik & Heir, Stig (2015). Radiological outcomes in a randomized trial comparing opening wedge and closing wedge techniques of high tibial osteotomy. Knee Surgery, Sports Traumatology, Arthroscopy. ISSN 0942-2056. p. 1–8. doi: 10.1007/s00167-015-3817-z.
• Clarke-Jenssen, John; Øvre, Stein A.; Røise, Olav & Madsen, Jan Erik (2015). Acetabular fracture assessment in four different pelvic trauma centers: have the Judet views become superfluous? Archives of Orthopaedic and Trauma Surgery. ISSN 0936-8051. 135(7), p. 913–918. doi: 10.1007/s00402-015-2223-9.
• Hjorthaug, Geir Aasmund; Madsen, Jan Erik; Nordsletten, Lars; Reinholt, Finn P.; Steen, Harald & Dimmen, Sigbjørn (2015). Tendon to bone tunnel healing - A study on the time-dependent changes in biomechanics, bone remodeling, and histology in a rat model. Journal of Orthopaedic Research. ISSN 0736-0266. 33(2), p. 216–223. doi: 10.1002/jor.22756.
• Fjalestad, Tore; Iversen, Petter; Hole, Margrethe Øye; SMEDSRUD, MORTEN & Madsen, Jan Erik (2014). Clinical investigation for displaced proximal humeral fractures in the elderly: a randomized study of two surgical treatments: reverse total prosthetic replacement versus angular stable plate Philos (The DELPHI-trial). BMC Musculoskeletal Disorders. ISSN 1471-2474. 15(1). doi: 10.1186/1471-2474-15-323.
• Adelved, Aron; Tötterman, Anna; Glott, Thomas; Søberg, Helene L.; Madsen, Jan Erik & Røise, Olav (2014). Patient-reported health minimum 8 years after operatively treated displaced sacral fractures: A prospective cohort study. Journal of Orthopaedic Trauma. ISSN 0890-5339. 28(12), p. 686–693. doi: 10.1097/BOT.0000000000000242.
• Støen, Ragnhild Øydna; Lofthus, Cathrine Marie; Nordsletten, Lars; Madsen, Jan Erik & Frihagen, Frede Jon (2014). Randomized trial of hemiarthroplasty versus internal fixation for femoral neck fractures: no differences at 6 years. Clinical Orthopaedics and Related Research. ISSN 0009-921X. 472(1), p. 360–367. doi: 10.1007/s11999-013-3245-7.
• Adelved, Aron; Tötterman, Anna; Hellund, Johan Castberg; Glott, Thomas; Madsen, Jan Erik & Røise, Olav (2014). Radiological findings correlate with neurological deficits but not with pain after operatively treated sacral fractures. An 11-year follow-up study of 28 patients. Acta Orthopaedica. ISSN 1745-3674. 85(4), p. 408–414. doi: 10.3109/17453674.2014.908344.
• Langslet, Ellen; Frihagen, Frede Jon; Opland, Vidar; Madsen, Jan Erik; Nordsletten, Lars & Figved, Wender (2014). Cemented versus Uncemented Hemiarthroplasty for Displaced Femoral Neck Fractures: 5-year Followup of a Randomized Trial. Clinical Orthopaedics and Related Research. ISSN 0009-921X. 472(4), p. 1291–1299. doi: 10.1007/s11999-013-3308-9.
• Audigè, Laurent; Kellam, Jim; Lambert, Simon; Madsen, Jan Erik; Babst, Reto & Andermahr, Jonas [Show all 8 contributors for this article] (2014). The AO Foundation and Orthopaedic Trauma Association (AO/OTA) scapula fracture classification system: focus on body involvement. Journal of shoulder and elbow surgery. ISSN 1058-2746. 23(2), p. 189–196. doi: 10.1016/j.jse.2013.07.040.
• Lambert, S.; Kellam, James F.; Jaeger, M.; Madsen, Jan Erik; Babst, Reto & Andermahr, Jonas [Show all 8 contributors for this article] (2013). Focussed classification of scapula fractures: Failure of the lateral scapula suspension system. Injury. ISSN 0020-1383. 44(11), p. 1507–1513. doi: 10.1016/j.injury.2013.03.001.
• Jaeger, Martin; Lambert, Simon; Südkamp, Norbert P.; Kellam, James F.; Madsen, Jan Erik & Babst, Reto [Show all 9 contributors for this article] (2013). The AO Foundation and Orthopaedic Trauma Association (AO/OTA) scapula fracture classification system: focus on glenoid fossa involvement. Journal of shoulder and elbow surgery. ISSN 1058-2746. 22(4), p. 512–520. doi: 10.1016/j.jse.2012.08.003.
• Wikerøy, Annette Konstanse Bordewich; Clarke-Jenssen, John; Øvre, Stein A.; Nordsletten, Lars; Madsen, Jan Erik & Hellund, Johan Castberg [Show all 7 contributors for this article] (2012). The natural history of bone bruise and bone remodelling in the traumatised hip A prospective 2-year follow-up study of bone bruise changes and DEXA measurements in 13 patients with conservatively treated traumatic hip dislocations and/or fractures. Injury. ISSN 0020-1383. 43(10), p. 1672–1677. doi: 10.1016/j.injury.2012.05.025.
• Harvey, Edward; Audige, Laurent; Herscovici, Dolfi Jr; Agel, Julie; Madsen, Jan Erik & Babst, Reto [Show all 8 contributors for this article] (2012). Development and Validation of the New International Classification for Scapula Fractures. Journal of Orthopaedic Trauma. ISSN 0890-5339. 26(6), p. 364–369. doi: 10.1097/BOT.0b013e3182382625.
• Adelved, Aron; Tötterman, Anna; Glott, Thomas; Madsen, Jan Erik & Røise, Olav (2012). Functional outcome 10 years after surgical treatment of displaced sacral fractures. Spine. ISSN 0362-2436. 37(16), p. E1009–E1016. doi: 10.1097/BRS.0b013e31823a0d83.
• Husebye, Inger Elisabeth Ellingsen; Lyberg, Torstein; Opdahl, Helge; Aspelin, Trude; Støen, Ragnhild Øydna & Madsen, Jan Erik [Show all 7 contributors for this article] (2012). Intramedullary nailing of femoral shaft fractures in polytraumatized patients. A longitudinal, prospective and observational study of the procedure-related impact on cardiopulmonary- and inflammatory responses. Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine. ISSN 1757-7241. 20. doi: 10.1186/1757-7241-20-2.
• Nerhus, Tor Kjetil; Heir, Stig; Svege, Ida Charlott; Skråmm, Inge; Jervidalo, Tore & Madsen, Jan Erik [Show all 7 contributors for this article] (2012). Time-dependent improvement in functional outcome following Oxford medial unicompartmental knee arthroplasty A prospective longitudinal multicenter study involving 96 patients. Acta Orthopaedica. ISSN 1745-3674. 83(1), p. 46–52. doi: 10.3109/17453674.2011.652890.
• Bjørnelv, Gudrun Maria Waaler; Frihagen, Frede Jon; Madsen, Jan Erik; Nordsletten, Lars & Aas, Eline (2012). Hemiarthroplasty compared to internal fixation with percutaneous cannulated screws as treatment of displaced femoral neck fractures in the elderly: cost-utility analysis performed alongside a randomized, controlled trial. Osteoporosis International. ISSN 0937-941X. 23(6), p. 1711–1719. doi: 10.1007/s00198-011-1772-1.
• Figved, Wender; Dahl, Jon; Snorrason, Finnur; Frihagen, Frede Jon; Röhrl, Stephan Maximillian & Madsen, Jan Erik [Show all 7 contributors for this article] (2012). Radiostereometric analysis of hemiarthroplasties of the hip - a highly precise method for measurements of cartilage wear. Osteoarthritis and Cartilage. ISSN 1063-4584. 20(1), p. 36–42. doi: 10.1016/j.joca.2011.11.006.
• Nerhus, Tor Kjetil; Heir, Stig; Thornes, Elisabeth; Madsen, Jan Erik & Ekeland, Arne Erling (2010). Time-dependent improvement in functional outcome following LCS rotating platform knee replacement. Acta Orthopaedica. ISSN 1745-3674. 81(6), p. 727–732. doi: 10.3109/17453674.2010.533929.
• Frihagen, Frede Jon; Figved, Wender; Madsen, Jan Erik; Lofthus, Cathrine Marie; Støen, Ragnhild Øydna & Nordsletten, Lars (2010). Behandling av lårhalsbrudd :. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 130(16), p. 1614–1617. doi: 10.4045/tidsskr.09.1264.
• Madsen, Jan Erik; Frihagen, Frede Jon & Flugsrud, Gunnar B (2010). Optimal ortopedisk behandling av den hardt skadde pasienten. Kirurgen. ISSN 1504-8888. p. 146–149.
• Wikerøy, Annette Konstanse Bordewich; Høiness, Per Reidar; Andreassen, Geir; Hellund, Johan Castberg & Madsen, Jan Erik (2010). No Difference in Functional and Radiographic Results 8.4 Years After Quadricortical Compared With Tricortical Syndesmosis Fixation in Ankle Fractures. Journal of Orthopaedic Trauma. ISSN 0890-5339. 24(1), p. 17–23. Show summary

  (underkjennes pga manglende UiO-adresse)

• Frihagen, Frede Jon; Waaler, Gudrun Maria; Madsen, Jan Erik; Nordsletten, Lars; Aspaas, Silje & Aas, Eline (2010). The cost of hemiarthroplasty compared to that of internal fixation for femoral neck fractures 2-year results involving 222 patients based on a randomized controlled trial. Acta Orthopaedica. ISSN 1745-3674. 81(4), p. 446–452. doi: 10.3109/17453674.2010.492763.
• Dimmen, Sigbjørn; Nordsletten, Lars; Engebretsen, Lars; Steen, Harald & Madsen, Jan Erik (2009). The effect of parecoxib and indometacin on tendon-to-bone healing in a bone tunnel AN EXPERIMENTAL STUDY IN RATS. Journal of Bone and Joint Surgery (JBJS). ISSN 0301-620X. 91B(2), p. 259–263. doi: 10.1302/0301-620X.91B2.21471.
• Figved, Wender; Opland, V; Frihagen, Frede Jon; Jervidalo, T; Madsen, Jan Erik & Nordsletten, Lars (2009). Cemented versus Uncemented Hemiarthroplasty for Displaced Femoral Neck Fractures. Clinical Orthopaedics and Related Research. ISSN 0009-921X. 467(9), p. 2426–2435. doi: 10.1007/s11999-008-0672-y.
• Dimmen, Sigbjørn; Nordsletten, Lars & Madsen, Jan Erik (2009). Parecoxib and Indomethacin Delay Early Fracture Healing: A Study in Rats. Clinical Orthopaedics and Related Research. ISSN 0009-921X. 467(8), p. 1992–1999. doi: 10.1007/s11999-009-0783-0.
• Husebye, EE; Lyberg, T; Madsen, Jan Erik; Nordsletten, Lars & Røise, Olav (2009). THE EARLY EFFECTS OF INTRAMEDULLARY REAMING OF THE FEMUR ON BONE MINERAL DENSITY; AN EXPERIMENTAL STUDY IN PIGS. Scandinavian Journal of Surgery. ISSN 1457-4969. 98(3), p. 189–194.
• Dimmen, Sigbjørn; Engebretsen, Lars; Nordsletten, Lars & Madsen, Jan Erik (2009). Negative effects of parecoxib and indomethacin on tendon healing: an experimental study in rats. Knee Surgery, Sports Traumatology, Arthroscopy. ISSN 0942-2056. 17(7), p. 835–839. doi: 10.1007/s00167-009-0763-7.
• Dimmen, Sigbjørn; Nordsletten, Lars; Engebretsen, Lars; Steen, Harald & Madsen, Jan Erik (2008). Negative effect of parecoxib on bone mineral during fracture healing in rats. Acta Orthopaedica. ISSN 1745-3674. 79, p. 438–444. doi: 10.1080/17453670710015373.

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• Midtgaard, Kaare Sourin; Madsen, Jan Erik & Alm, Carl Erik (2019). 2019: Høstmøteboken - vitenskapelig program og abstrakter. Norsk Ortopedisk Forening. ISBN 978-82-994275-1-7. 236 p.

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• Wünsche, Leonore; Brattgjerd, Jan Egil; Halvorsen, Vera Baasland & Madsen, Jan Erik (2021). Nerveskader ved krysspinning av suprakondylære humerusfrakturer hos barn - en retrospektiv studie.
• Stake, Ingrid Kvello; Brady, Alex; Bryniarski, Anna; Dornan, Grant; Madsen, Jan Erik & Engebretsen, Lars [Show all 8 contributors for this article] (2021). The impact of posterior malleolar fixation on syndesmotic stability.
• Midtgaard, Kaare Sourin; Søreide, Endre; Moatshe, Gilbert; Brattgjerd, Jan Egil; Steen, Harald & Madsen, Jan Erik [Show all 7 contributors for this article] (2018). Biomekanisk studie av pinner og tensjonsbånd vs. moderne plateosteosyntese ved to-parts olecranonfraktur.
• Madsen, Jan Erik (2015). Bekkenfrakturer. In Matre, Kjell & Hole, Randi Margrete (Ed.), Bruddbehandling. Legeforlaget AS. ISSN 9788292934111. p. 206–214.
• Hole, Randi Margrete & Madsen, Jan Erik (2015). Humerus skaftfrakturer. In Matre, Kjell & Hole, Randi Margrete (Ed.), Bruddbehandling. Legeforlaget AS. ISSN 9788292934111. p. 146–151.
• Paulsrud, Øyvind & Madsen, Jan Erik (2015). Reponering og implantatvalg. In Matre, Kjell & Hole, Randi Margrete (Ed.), Bruddbehandling. Legeforlaget AS. ISSN 9788292934111. p. 66–77.
• Svenøy, Stian; Brattgjerd, Jan Egil; WESTBERG, MARIANNE; Madsen, Jan Erik; Nordsletten, Lars & Frihagen, Frede (2014). Preoperativ liggetid for hofebrudd operert ved Oslo universitetssykehus.
• Brattgjerd, Jan Egil; Frihagen, Frede & Madsen, Jan Erik (2013). Preoperativ liggetid ved hoftebrudd operert ved Oslo universitetssykehus i 2012.
• Frihagen, Frede Jon; Madsen, Jan Erik; Nordsletten, Lars; Lofthus, Cathrine Marie & Støen, Ragnhild Øydna (2013). HEMIARTHROPLASTY OR INTERNAL FIXATION FOR DISPLACED FEMORAL NECK FRACTURES IN THE ELDERLY: 6 YEAR FOLLOW UP OF AN RCT. Osteoporosis International. ISSN 0937-941X. 24, p. S135–S135.
• Adelved, Aron; Tötterman, Anna; Glott, Thomas; Søberg, Helene L.; Madsen, Jan Erik & Røise, Olav (2013). Patient-reported health after operatively treated displaced sacral fractures: a 10-year follow-up.
• Adelved, Aron; Tötterman, Anna; Glott, Thomas; Søberg, Helene L.; Madsen, Jan Erik & Røise, Olav (2013). Patient-Reported Health After Operatively Treated Displaced Sacral Fractures: A 10-Year Follow-Up.
• Adelved, Aron; Tötterman, Anna; Glott, Thomas; Søberg, Helene L.; Madsen, Jan Erik & Røise, Olav (2013). Patient-reported health 10 years after displaced sacral fractures treated with internal fixation.
• Adelved, Aron; Tötterman, Anna; Glott, Thomas; Søberg, Helene L.; Madsen, Jan Erik & Røise, Olav (2013). Patient-reported health 10 years after operatively treated displaced sacral fractures.
• Adelved, Aron; Tötterman, Anna; Glott, Thomas; Madsen, Jan Erik & Røise, Olav (2011). Long-Term Outcome After Displaced Sacral Fractures Treated With Internal Fixation.
• Frihagen, Frede Jon; Figved, Wender; Madsen, Jan Erik; Lofthus, Cathrine Marie; Støen, Ragnhild Øydna & Nordsletten, Lars (2010). F. Frihagen og medarbeidere svarer: :. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 130(20).
• Madsen, Jan Erik (2010). Treatment of displaced intracapsular hip fractures in older patients. BMJ. British Medical Journal. ISSN 0959-8146. 340. doi: 10.1136/bmj.c2810.
• Adelved, Aron; Tötterman, Anna; Madsen, Jan Erik & Røise, Olav (2009). Secondary neurological deficits after a conservatively treated U-shaped sacral fracture.
• Dimmen, Sigbjørn & Madsen, Jan Erik (2010). Effects of cox inhibitors on bone and tendon healing. Unipub forlag. ISSN 978-82-8072-595-0.

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