Academic article

• Frønsdal, Peter Sverre; Dybvik, Eva Hansen; Kristensen, Torbjørn et al. (2025). Comparison of Short and Long Intramedullary Nails in the Treatment of Trochanteric and Subtrochanteric Fractures. (external link)
• Boutera, Andrea Toft; Dybvik, Eva Hansen; Hallan, Geir et al. (2025). Weekend discharge after hip fracture surgery is associated with increased 30-day mortality. A retrospective observational study of 35,138 hip fractures reported to the Norwegian Hip Fracture Register. (external link)
• Tellefsen, Raymond Andre; Kristensen, Torbjørn; Dybvik, Eva Hansen et al. (2025). Surgical approaches in hemiarthroplasty for hip fracture : results of 48,222 hemiarthroplasties in the Norwegian Hip Fracture Register. (external link)
• Leta, Tesfaye Hordofa; Chang, Richard N.; Lie, Stein Atle et al. (2025). Antibiotic-Loaded Bone Cement and Risk of Infection After Knee Arthroplasty in High-Risk Patients. (external link)
• Jensen, Simon Storgaard; Gundtoft, Per Hviid; Gjertsen, Jan-Erik et al. (2025). Individual and combined effects of somatic and mental disorders on reoperation risk after hip fracture surgery: a nationwide danish cohort study of 110,625 patients. (external link)
• Børsheim, Sjur; Kristensen, Torbjørn; Hallan, Geir et al. (2025). Periprosthetic femoral fracture following hip arthroplasty : which component design and fixation method has the lowest risk of reoperation?. (external link)
• Risbo, Nickolaj; Ehrenstein, Vera; Gundtoft, Per Hviid et al. (2025). Socioeconomic Position and Chronic Opioid Use After Hip Fracture Surgery: A Danish Population-Based Cohort Study. (external link)
• Kjærvik, Cato; Gjertsen, Jan-Erik; Stensland, Eva et al. (2025). The influence of socioeconomic position on patient-reported outcome measures following hip fractures – a register-based observational study on 35,206 patients from the Norwegian hip fracture register 2014–2018. (external link)
• Andreasen, Camilla; Dahl, Cecilie; Frihagen, Frede et al. (2025). Fracture liaison service (FLS) is associated with lower subsequent fragility fracture risk and mortality: NoFRACT (the Norwegian capture the fracture initiative). (external link)
• Borgen, Tove Tveitan; Brunborg, Cathrine; Frihagen, Frede et al. (2025). External validation of FRISBEE 2-year and 5-year fracture prediction models in a fracture liaison service cohort. (external link)
• Lashkari, Reyhaneh; Dahl, Cecilie; Borgen, Tove Tveitan et al. (2025). Distal forearm fracture risk in a cohort of female and male immigrants and Norwegian-born residents aged 20 to 79 years in Norway. (external link)
• Khan, Michelle; Lygre, Stein Håkon Låstad; Badawy, Mona et al. (2025). Association of tourniquet use on short-term implant survival after primary total knee arthroplasty: a study of 24,249 knees from the Norwegian Arthroplasty Register. (external link)
• Lutro, Olav; Tjørhom, Marianne Bollestad; Leta, Tesfaye Hordofa et al. (2025). How many doses and what type of antibiotic should be used as systemic antibiotic prophylaxis in primary hip and knee arthroplasty? A register-based study on 301,204 primary total and hemi-hip and total knee arthroplasties in Norway 2005–2023. (external link)
• Semsarian, Sepideh; Omsland, Tone Kristin; Heen, Espen Kolstad et al. (2024). Subsequent fracture risk in Norwegians and immigrants with an index forearm fracture: a cohort study. (external link)
• Hole, Randi Margrete; Fenstad, Anne Marie; Gjertsen, Jan-Erik et al. (2024). Influence of design features and brand of reverse shoulder arthroplasties on survivorship and reasons for revision surgery: results of 5,494 arthroplasties with up to 15 years’ follow-up reported to the Norwegian Arthroplasty Register 2007–2022. (external link)
• Kjærvik, Cato; Gjertsen, Jan-Erik; Stensland, Eva et al. (2024). Patient-reported outcome measures in hip fracture patients: data on 35,206 patients from the Norwegian Hip Fracture Register, 2014 to 2018. (external link)
• Silva, Maya Maya Barbosa; Gjertsen, Jan-Erik; Moldestad, Irene Ohlen et al. (2024). Effects of implant precoating and fat contamination on the stability of the tibial baseplate. (external link)
• Leta, Tesfaye Hordofa; Chang, Richard N.; Fenstad, Anne Marie et al. (2024). Number of Doses of Systemic Antibiotic Prophylaxis May Be Reduced in Cemented Primary Knee Arthroplasty Irrespective of Use of Antibiotic in the Cement: A Multiregistry-Based Meta-Analysis. (external link)
• Kjærvik, Cato; Gjertsen, Jan-Erik; Stensland, Eva et al. (2024). Impact of physiotherapy access on health-related quality of life following hip fracture: an observational study on 30 752 hip fractures from the Norwegian Hip Fracture Register 2014–2018. (external link)
• Woldeyesus, Thomas Abel; Gjertsen, Jan-Erik; Dalen, Ingvild et al. (2024). Preoperative CT improves the assessment of stability in trochanteric hip fractures. (external link)
• Ahmad, Amara; Egeland, Emma Helene; Dybvik, Eva Hansen et al. (2024). Equivalent mortality after operation with sliding hip screw or intramedullary nail for trochanteric AO/OTA A1 and A2 fractures reported in the Norwegian Hip Fracture Register 2008 to 2020. (external link)
• Leta, Tesfaye Hordofa; Lie, Stein Atle; Fenstad, Anne Marie et al. (2024). Periprosthetic Joint Infection After Total Knee Arthroplasty With or Without Antibiotic Bone Cement. (external link)
• Vinther, Dennis; Thomsen, Reimar W.; Furnes, Ove Nord et al. (2024). Impact of diabetes on the risk of subsequent fractures in 92,600 patients with an incident hip fracture: A Danish nationwide cohort study 2004–2018. (external link)
• Gjertsen, Jan-Erik; Nilsen, Daniel Hoseth; Furnes, Ove Nord et al. (2024). Promoting cemented fixation of the femoral stem in elderly female hip arthroplasty patients and elderly hip fracture patients: a retrospective cohort study from the Norwegian Arthroplasty Register and the Norwegian Hip Fracture Register. (external link)
• Leta, Tesfaye Hordofa; Fenstad, Anne Marie; Lygre, Stein Håkon Låstad et al. (2023). The use of antibiotic-loaded bone cement and systemic antibiotic prophylactic use in 2,971,357 primary total knee arthroplasties from 2010 to 2020: an international register-based observational study among countries in Africa, Europe, North America, and Oceania. (external link)
• Grønhaug, Kirsten Marie Larsen; Dybvik, Eva Hansen; Matre, Kjell et al. (2023). Comparison of Intramedullary Nails in the Treatment of Trochanteric and Subtrochanteric Fractures: An Observational Study of 13,232 Fractures in the Norwegian Hip Fracture Register. (external link)
• Pawloy, Karola; Fenstad, Anne Marie; Leta, Tesfaye Hordofa et al. (2023). No difference in risk of revision due to infection between clindamycin and cephalosporins as antibiotic prophylaxis in cemented primary total knee replacements: a report from the Norwegian Arthroplasty Register 2005–2020. (external link)
• Garre-Fivelsdal, Tuva Elisabeth; Gjertsen, Jan-Erik; Dybvik, Eva Hansen et al. (2023). A standardized clinical pathway for hip fracture patients is associated with reduced mortality: data from the Norwegian Hip Fracture Register. (external link)
• Furnes, Ove Nord; Gjertsen, Jan-Erik; Inderhaug, Eivind et al. (2023). I starten var det Hofteregisteret- så ble vi flere. Nasjonalt Register for Leddproteser, Nasjonalt Hoftebruddregister, Nasjonalt Korsbåndregister og Nasjonalt Barnehofteregister. (external link)
• Andreasen, Camilla; Dahl, Cecilie; Solberg, Lene Bergendal et al. (2023). Epidemiology of forearm fractures in women and men in Norway 2008–2019. (external link)
• Khan, Michelle; Gjertsen, Jan-Erik; Fenstad, Anne Marie et al. (2023). Cementing techniques for total ktnee arthroplasty in Norwegian hospitals; a questionnaire-based study. (external link)
• Sund, Anders; Dybvik, Eva Hansen; Gjertsen, Jan-Erik (2023). Orthopaedic surgeons’ ability to detect pathologic hip fractures: review of 1484 fractures reported to the Norwegian Hip Fracture Register. (external link)
• Hole, Randi Margrete; Fenstad, Anne Marie; Gjertsen, Jan-Erik et al. (2023). The Delta III and Delta Xtend reverse shoulder arthroplasty—risk of revision and failure mechanisms: a report on 3650 cases from the Norwegian Arthroplasty Register 1994-2021. (external link)
• Omsland, Tone Kristin; Solberg, Lene Bergendal; Bjørnerem, Åshild Marit et al. (2023). Validation of forearm fracture diagnoses in administrative patient registers. (external link)
• Hoseth, John Magne; Aae, Tommy Frøseth; Jakobsen, Rune Bruhn et al. (2023). Compensation Claims After Hip Fracture Surgery in Norway 2008-2018. (external link)
• Holsen, Maria; Hovind, Veronica; Bedane, Haji Kedir et al. (2022). Geographical variation in orthopedic procedures in Norway: Cross-sectional population-based study. (external link)
• Midttun, Espen; Andersen, Morten Torheim; Engebretsen, Lars et al. (2022). Good validity in the Norwegian Knee Ligament Register: assessment of data quality for key variables in primary and revision cruciate ligament reconstructions from 2004 to 2013. (external link)
• Kjeldgaard, Helena Kames; Meyer, Haakon Eduard; O’Flaherty, Martin et al. (2022). Impact of Total Hip Replacements on the Incidence of Hip Fractures in Norway During 1999–2019. A Norwegian Epidemiologic Osteoporosis Studies (NOREPOS) Study. (external link)
• Kjærvik, Cato; Gjertsen, Jan-Erik; Stensland, Eva et al. (2022). Modifiable and non-modifiable risk factors in hip fracture mortality in Norway, 2014 to 2018 : a linked multiregistry study. (external link)
• Grønhaug, Kirsten Marie Larsen; Dybvik, Eva Hansen; Gjertsen, Jan-Erik et al. (2022). Subsequent ipsi- and contralateral femoral fractures after intramedullary nailing of a trochanteric or subtrochanteric fracture: a cohort study on 2012 patients. (external link)
• Vinther, Dennis; Mailhac, Aurelie; Andersen, Ina Trolle et al. (2022). Association between duration of anticoagulant thromboprophylaxis and revision rate in primary total hip arthroplasty: a Danish and Norwegian nationwide cohort study. (external link)
• Benson, Thea Emily; Andersen, Ina Trolle; Overgaard, Søren et al. (2022). Association of perioperative thromboprophylaxis on revision rate due to infection and aseptic loosening in primary total hip arthroplasty - new evidence from the Nordic Arthroplasty Registry Association (NARA). (external link)
• Lie, Stein Atle; Fenstad, Anne Marie; Lygre, Stein Håkon Låstad et al. (2022). Kaplan-Meier and Cox Regression Are Preferable for the Analysis of Time to Revision of Joint Arthroplasty: Thirty-One Years of Follow-up for Cemented and Uncemented THAs Inserted from 1987 to 2000 in the Norwegian Arthroplasty Register. (external link)
• Bartels, Stefan; Kristensen, Torbjørn; Gjertsen, Jan-Erik et al. (2022). Total Hip Arthroplasty Leads to Better Results After Low-Energy Displaced Femoral Neck Fracture in Patients Aged 55 to 70 Years: A Randomized Controlled Multicenter Trial Comparing Internal Fixation and Total Hip Arthroplasty. (external link)
• Grønhaug, Kirsten Marie Larsen; Dybvik, Eva Hansen; Matre, Kjell et al. (2022). Intramedullary nail versus sliding hip screw for stable and unstable trochanteric and subtrochanteric fractures: 17,341 patients from the Norwegian Hip Fracture Register. (external link)
• Ngoie, Leonard Banza; Dybvik, Eva Hansen; Hallan, Geir et al. (2022). The unmet need for treatment of children with musculoskeletal impairment in Malawi. (external link)
• Alm, Carl Erik; Gjertsen, Jan-Erik; Basso, Trude et al. (2021). Trochanteric stabilizing plate in the treatment of trochanteric fractures: a scoping review. (external link)
• Hole, Randi Margrete; Fenstad, Anne Marie; Gjertsen, Jan-Erik et al. (2021). Thromboprophylaxis in primary shoulder arthroplasty does not seem to prevent death: a report from the Norwegian Arthroplasty Register 2005–2018. (external link)
• Chokotho, Linda; Donnelley, Claire A; Young, Sven et al. (2021). Cost utility analysis of intramedullary nailing and skeletal traction treatment for patients with femoral shaft fractures in Malawi. (external link)
• Alm, Carl Erik; Frihagen, Frede; Dybvik, Eva Hansen et al. (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. (external link)
• Melbye, Silje Marie; Haug, Sofie Cecilia Dietrich; Fenstad, Anne Marie et al. (2021). How Does Implant Survivorship Vary with Different Corail Femoral Stem Variants? Results of 51,212 Cases with Up to 30 Years Of Follow-up from the Norwegian Arthroplasty Register. (external link)
• Kristoffersen, Målfrid Holen; Dybvik, Eva Hansen; Steihaug, Ole Martin et al. (2021). Patient-reported outcome measures after hip fracture in patients with chronic cognitive impairment: results from 34.675 patients in the Norwegian Hip Fracture Register. (external link)
• Kjærvik, Cato; Gjertsen, Jan-Erik; Engesæter, Lars B. et al. (2021). Waiting time for hip fracture surgery: hospital variation, causes, and effects on postoperative mortality data on 37,708 operations reported to the Norwegian Hip fracture Register from 2014 to 2018. (external link)
• Hjelle, Anja Myhre; Apalset, Ellen M.; Gjertsen, Jan-Erik et al. (2021). Associations of overweight, obesity and osteoporosis with ankle fractures. (external link)
• Ngoie, Leonard Banza; Dybvik, Eva Hansen; Hallan, Geir et al. (2021). Prevalence, causes and impact of musculoskeletal impairment in Malawi: A national cluster randomized survey. (external link)
• Kjærvik, Cato; Stensland, Eva; Byhring, Hanne Sigrun et al. (2020). Hip fracture treatment in Norway: deviation from evidence-based treatment guidelines: data from the Norwegian Hip Fracture Register. (external link)
• Kristoffersen, Målfrid Holen; Dybvik, Eva Hansen; Steihaug, Ole Martin et al. (2020). Cognitive impairment influences the risk of reoperation after hip fracture surgery: results of 87,573 operations reported to the Norwegian Hip Fracture Register. (external link)
• Lian, Tom; Dybvik, Eva Hansen; Gjertsen, Jan Erik et al. (2020). Compliance with national guidelines for antibiotic prophylaxis in hip fracture patients: A quality assessment study of 13 329 patients in the Norwegian Hip Fracture Register. (external link)
• Hjelle, Anja Myhre; Gjertsen, Jan-Erik; Apalset, Ellen Margrete et al. (2020). No association between osteoporosis and AO classification of distal radius fractures: an observational study of 289 patients. (external link)
• Pollmann, Christian Thomas; Dahl, Fredrik Andreas; Røtterud, Jan H et al. (2020). Surgical site infection after hip fracture – mortality and risk factors: an observational cohort study of 1,709 patients. (external link)
• Pollmann, Christian Thomas; Gjertsen, Jan-Erik; Dale, Håvard et al. (2020). Operative approach influences functional outcome after DAIR for infected total hip arthroplasty. (external link)
• Chokotho, Linda; Wu, Hao-Hua; Shearer, David et al. (2020). Outcome at 1 year in patients with femoral shaft fractures treated with intramedullary nailing or skeletal traction in a low-income country: a prospective observational study of 187 patients in Malawi. (external link)
• Horner, Nolan S.; Grønhaug, Kirsten Marie Larsen; Svantesson, Eleonor et al. (2020). Timing of hip hemiarthroplasty and the influence on prosthetic joint infection. (external link)
• Kristensen, Torbjørn; Dybvik, Eva Hansen; Kristoffersen, Målfrid Holen et al. (2020). Cemented or uncemented hemiarthroplasty for femoral neck fracture? Data from the Norwegian Hip Fracture Register. (external link)
• Gjertsen, Jan-Erik (2020). CORR Insights: Is the Survivorship of Birmingham Hip Resurfacing Better Than Selected Conventional Hip Arthroplasties in Men Younger Than 65 Years of Age? A Study from the Australian Orthopaedic Association National Joint Replacement Registry.. (external link)
• Leer-Salvesen, Sunniva; Dybvik, Eva Hansen; Ranhoff, Anette Hylen et al. (2020). Do direct oral anticoagulants (DOACs) cause delayed surgery, longer length of hospital stay, and poorer outcome for hip fracture patients?. (external link)
• Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal et al. (2019). Post-Fracture Risk Assessment: Target The Centrally Sited Fractures First! A Substudy of NoFRACT. (external link)
• Chokotho, Linda; Lau, Brian C.; Conway, Devin et al. (2019). Validation of chichewa short musculoskeletal function assessment (SMFA) questionnaire: A cross-sectional study. (external link)
• Pollmann, Christian Thomas; Røtterud, Jan H; Gjertsen, Jan-Erik et al. (2019). Fast track hip fracture care and mortality – an observational study of 2230 patients. (external link)
• Boutera, Andrea; Dybvik, Eva Hansen; Hallan, Geir et al. (2019). Is there a weekend effect after hip fracture surgery? A study of 74,410 hip fractures reported to the Norwegian Hip Fracture Register. (external link)
• Dale, Håvard; Børsheim, Sjur; Kristensen, Torbjørn et al. (2019). Fixation, sex and age: highest risk of revision for uncemented stems in elderly women- data from 66,995 primary total hip arthroplasties in the Norwegian arthroplasty register.. (external link)
• Jobory, Ammar; Kärrholm, Johan; Overgaard, Søren et al. (2019). Reduced revision risk for dual-mobility cup in total hip replacement due to hip fracture: A matched-pair analysis of 9,040 cdases from the Nordic Arthroplasty Register Association (NARA). (external link)
• Pedersen, Alma B.; Andersen, Ina Trolle; Overgaard, Søren et al. (2019). Optimal duration of anticoagulant thromboprophylaxis in total hip arthroplasty: new evidence in 55,540 patients with osteoarthritis from the Nordic Arthroplasty Register Association (NARA) group. (external link)
• Bartels, Stefan; Gjertsen, Jan-Erik; Frihagen, Frede Jon et al. (2019). Low bone density and high morbidity in patients between 55 and 70 years with displaced femoral neck fractures: A case-control study of 50 patients vs 150 normal controls. (external link)
• Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal et al. (2019). Determinants of trabecular bone score and prevalent vertebral fractures in women with fragility fractures: a cross-sectional sub-study of NoFRACT. (external link)
• Refsum, Anders Myhre; Nguyen, Uy Viet; Gjertsen, Jan Erik et al. (2019). Cementing technique for primary knee arthroplasty: a scoping review. (external link)
• Dale, Håvard; Børsheim, Sjur; Kristensen, Torbjørn et al. (2019). Perioperative, short, and long-term mortality related to fixation in primary total hip arthroplasty: a study of 79,557 patients in the Norwegian Arthroplasty Register. (external link)
• Leer-Salvesen, Sunniva; Engesæter, Lars B.; Dybvik, Eva Hansen et al. (2019). Does time from fracture to surgery affect mortality and intraoperative medical complications for hip fracture patients?. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Schrama, Johannes Cornelis et al. (2019). Outcome of revision surgery for infection after total knee arthroplasty: Results of 3 surgical strategies. (external link)
• Kristoffersen, Målfrid Holen; Dybvik, Eva Hansen; Steihaug, Ole Martin et al. (2019). Validation of orthopaedic surgeons' assessment of cognitive function in patients with acute hip fracture. (external link)
• Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal et al. (2019). High prevalence of vertebral fractures and low trabecular bone score in patients with fragility fractures: A cross-sectional sub-study of NoFRACT. (external link)
• Leer-Salvesen, Sunniva; Dybvik, Eva Hansen; Engesæter, Lars B. et al. (2018). Low-molecular-weight heparin for hip fracture patients treated with osteosynthesis: should thromboprophylaxis start before or after surgery? An observational study of 45,913 hip fractures reported to the Norwegian Hip Fracture Register. (external link)
• Kristensen, Torbjørn; Dybvik, Eva Hansen; Furnes, Ove et al. (2018). More reoperations for periprosthetic fracture after cemented hemiarthroplasty With polished taper-slip stems than after anatomical and straight stems in the treatment of hip fractures.. (external link)
• Ngoie, Leonard Banza; Gallaher, Jared; Dybvik, Eva Hansen et al. (2018). The rise in road traffic injuries in Lilongwe, Malawi: A snapshot of the growing epidemic of trauma in low income countries. (external link)
• Andreasen, Camilla; Solberg, Lene Bergendal; Basso, Trude et al. (2018). Effect of a Fracture Liaison Service on the Rate of Subsequent Fracture Among Patients With a Fragility Fracture in the Norwegian Capture the Fracture Initiative (NoFRACT): A Trial Protocol. (external link)
• Parker, Martyn; Raval, Pradyumna; Gjertsen, Jan-Erik (2018). Nail or plate fixation for A3 trochanteric hip fractures: A systematic review of randomised controlled trials. (external link)
• Authen, Ane Lyseid; Dybvik, Eva Hansen; Furnes, Ove et al. (2018). Surgeon's experience level and risk of reoperation after hip fracture surgery: an observational study on 30,945 patients in the Norwegian Hip Fracture Register 2011-2015. (external link)
• Bartels, Stefan; Gjertsen, Jan-Erik; Frihagen, Frede Jon et al. (2017). High failure rate after internal fixation and beneficial outcome after arthroplasty in treatment of displaced femoral neck fractures in patients between 55 and 70 years. An observational study of 2,713 patients reported to the Norwegian Hip Fracture Register. (external link)
• Gjertsen, Jan-Erik; Dybvik, Eva Hansen; Furnes, Ove et al. (2017). Improved outcome after hip fracture surgery in Norway: 10-year results from the Norwegian Hip Fracture Register. (external link)
• Johansen, Antony; Golding, David; Brent, Louise et al. (2017). Using national hip fracture registries and audit databases to develop an international perspective. (external link)
• Chokotho, Linda; Mkandawire, Nyengo; Conway, Devin et al. (2017). Validation and reliability of the Chichewa translation of the EQ-5D quality of life questionnaire in adults with orthopaedic injuries in Malawi. (external link)
• Kristensen, Torbjørn; Vinje, Tarjei; Havelin, Leif Ivar et al. (2017). Posterior approach compared to Direct lateral approach resulted in better patient-reported outcome after hemiarthroplsty for femoral neck fracture. (external link)
• Gjertsen, Jan-Erik; Baste, Valborg; Fevang, Jonas Meling et al. (2016). Quality of life following hip fractures: Results from the Norwegian hip fracture register. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr et al. (2016). Outcomes of unicompartmental knee arthroplasty after aseptic revision to total knee arthroplasty: a comparative study of 768 TKAs and 578 UKAs revised to TKAs from the norwegian arthroplasty register (1994 to 2011). (external link)
• Kristensen, Torbjørn; Vinje, Tarjei; Havelin, Leif Ivar et al. (2016). Posterior approach compared to direct lateral approach resulted in better patient-reported outcome after hemiarthroplasty for femoral neck fracture: 20,908 patients from the Norwegian Hip Fracture Register. (external link)
• Leer-Salvesen, Sunniva; Dybvik, Eva Hansen; Dahl, Ola Einar et al. (2016). Postoperative start compared to preoperative start of low-molecular-weight heparin increases mortality in patients with femoral neck fractures: An observational study of 20,241 hemiprostheses reported to the Norwegian Hip Fracture Register. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr et al. (2015). Secondary patella resurfacing in painful non-resurfaced total knee arthroplasties: A study of survival and clinical outcome from the Norwegian Arthroplasty Register (1994–2011). (external link)
• Rogmark, Cecilia; Fenstad, Anne Marie; Leonardsson, Olof et al. (2014). Posterior approach and uncemented stems increases the risk of reoperation after hemiarthroplasties in elderly hip fracture patients. (external link)
• Persson, Andreas; Fjeldsgaard, Knut; Gjertsen, Jan-Erik et al. (2014). Increased risk of revision with hamstring tendon grafts compared with patellar tendon grafts after anterior cruciate ligament reconstruction: A study of 12,643 patients from the norwegian cruciate ligament registry, 2004-2012. (external link)
• Gjertsen, Jan Erik; Fenstad, Anne Marie; Leonardsson, Olof et al. (2014). Hemiarthroplasties after hip fractures in Norway and Sweden: A collaboration between the Norwegian and Swedish national registries. (external link)
• Matre, Kjell; Havelin, Leif Ivar; Gjertsen, Jan-Erik et al. (2013). Intramedullary nails result in more reoperations than sliding hip screws in two-part intertrochanteric fractures. (external link)
• Matre, Kjell; Havelin, Leif Ivar; Gjertsen, Jan-Erik et al. (2013). TRIGEN INTERTAN Intramedullary Nail Versus Sliding Hip Screw: A Prospective, Randomized Multicenter Study on Pain, Function, and Complications in 684 Patients with an Intertrochanteric or Subtrochanteric Fracture and One Year of Follow-up. (external link)
• Matre, Kjell; Havelin, Leif Ivar; Gjertsen, Jan-Erik et al. (2013). Sliding hip screw versus IM nail in reverse oblique trochanteric and subtrochanteric fractures. A study of 2716 patients in the Norwegian Hip Fracture Register. (external link)
• Talsnes, Ove; Vinje, Tarjei; Gjertsen, Jan-Erik et al. (2013). Perioperative mortality in hip fracture patients treated with cemented and uncemented hemiprosthesis: a register study of 11,210 patients. (external link)
• Gjertsen, Jan-Erik; Lie, Stein Atle; Vinje, Tarjei et al. (2012). More re-operations after uncemented than cemented hemiarthroplasty used in the treatment of displaced fractures of the femoral neck: an observational study of 11,116 hemiarthroplasties from a national register. (external link)
• Gjertsen, Jan-Erik; Fevang, Jonas Meling; Matre, Kjell et al. (2011). Clinical outcome after undisplaced femoral neck fractures. (external link)
• Gjertsen, Jan-Erik; Vinje, Tarjei; Engesæter, Lars B. et al. (2010). Internal screw fixation compared with bipolar hemiarthroplasty for treatment of displaced femoral neck fractures in elderly patients. (external link)
• Gjertsen, Jan-Erik; Engesæter, Lars B.; Furnes, Ove Nord et al. (2008). The Norwegian Hip Fracture Register - Experiences after the first 2 years and 15,576 reported operations. (external link)
• Gjertsen, Jan-Erik; Vinje, Tarjei; Lie, Stein Atle et al. (2008). Patient satisfaction, pain, and quality of life 4 months after displaced femoral neck fractures - A comparison of 663 fractures treated with internal fixation and 906 with bipolar hemiarthroplasty reported to the Norwegian Hip Fracture Register. (external link)
• Høl, Paul Johan; Mølster, Anders; Gjerdet, Nils Roar et al. (2006). Hip fracture implants increase serum metal levels. (external link)

Academic lecture

• Kjærvik, Cato; Gjertsen, Jan-Erik; Stensland, Eva et al. (2024). Tilgang til fysioterapi etter hoftebrudd påvirker helserelatert livskvalitet. (external link)
• Khan, Michelle; Lygre, Stein Håkon Låstad; Hallan, Geir et al. (2023). Bruk av blodtomhet ved totalprotese i kne- 3 års oppfølging (2018-2021) med data fra Nasjonalt register for leddproteser. (external link)
• Bråtveit, Erik; Gjertsen, Jan-Erik; Kjærvik, Cato (2023). Sosioøkonomiske forhold påvirker pasientrapporterte utfallsmål (PROMs) etter hoftebrudd. (external link)
• Kjærvik, Cato; Søreide, Odd; Stensland, Eva et al. (2022). Socioeconomic factors - effects on outcome after hip fractures. (external link)
• Kjærvik, Cato; Søreide, Odd; Gjertsen, Jan-Erik et al. (2022). Effects of adherence to guidelines in treatment of displaced femoral neck fractures. (external link)
• Woldeyesus, Thomas Abel; Paulsen, Aksel; Gjertsen, Jan-Erik et al. (2022). RANDOMISERT KONTROLLERT STUDIE; INTRAMEDULLÆR MARGNAGLE VERSUS PROTESE VED USTABILE TROKANTÆRE HOFTEBRUDD. (external link)
• Woldeyesus, Thomas Abel; Gjertsen, Jan-Erik; Dalen, Ingvild et al. (2021). Diagnostikk av trokantære hoftebrudd - sammenligning av røntgen og CT. (external link)
• Kjærvik, Cato; Gjertsen, Jan-Erik; Søreide, Odd et al. (2020). Betydelig variasjon i etterlevelse etter retningslinjer for behandling av dislokerte lårhalsbrudd. (external link)
• Kjærvik, Cato; Stensland, Eva; Byhring, Hanne Sigrun et al. (2020). Effekt av etterlevelse av retningslinjer for behandling av dislokerte lårhalsbrudd. (external link)
• Khan, Michelle; Gjertsen, Jan-Erik; Refsum, Anders Myhre et al. (2020). En spørreundersøkelse om sementeringsteknikker som brukes ved total kneprotesekirurgi ved norske sykehus. (external link)
• Kjærvik, Cato; Stensland, Eva; Søreide, Odd et al. (2019). Sykehusegenskaper påvirker overlevelse etter hoftebrudd. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Høvding, Pål et al. (2018). Revision of infected total knee arthroplasty: Do surgical strategies matter?. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Høvding, Pål et al. (2018). Outcome of revision surgery for infected total knee arthroplasty: Do surgical strategies matter?. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Høvding, Pål et al. (2018). Result of revision surgery for infected total knee arthroplasty. Do surgical strategies matter?. (external link)
• Persson, Andreas; Fjeldsgaard, Knut; Gjertsen, Jan-Erik et al. (2017). New Trauma is the Most Common Cause of Revision after primary anterior cruciate ligament reconstruction – a study from the Norwegian Knee Ligament Registry 2004–2015. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Håvding, Pål et al. (2017). Resultater ved revisjon for infisert kneprotese. En observasjons studie fra Nasjonalt Register for Leddproteser (1994-2016).. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr et al. (2016). The outcome of unicompartmental knee arthroplasties after aseptic revision into total knee arthroplasties. A comparative study of 768 total knees and 578 uni knees revised to total knees reported to Norwegian Arthroplasty Register (1994-2011).. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr et al. (2016). The outcome of unicompartmental knee arthroplasties after aseptic revision into total knee arthroplasties. A comparative study of 768 total knees and 578 uni knees revised to total knees reported to Norwegian Arthroplasty Register (1994-2011.. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr et al. (2016). The outcome of unicompartmental knee arthroplasties after aseptic revision into total knee arthroplasties. A comparative study of 768 total knees and 578 uni knees revised to total knees reported to Norwegian Arthroplasty Register (1994-2011). (external link)
• Persson, A; Fjeldsgaard, Knut; Gjertsen, Jan-Erik et al. (2016). New trauma is the most common cause of revision after primary anterior cruciate ligament reconstruction - a study from the Norwegian knee ligament registry 2004-2015. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr et al. (2015). Sammenligning av 768 total- og 578 uni-kneproteser reviderte til total kneproteser fra Nasjonalt Register for Leddproteser (1994-2011). (external link)
• Leta, Tesfaye Hordofa; Skredderstuen, Arne Kr; Lygre, Stein Håkon Låstad et al. (2015). The Outcome of unicompartmental knee arthroplasties after aseptic revision into total knee arthroplasties. A comparative study of 768 total and 578 uni-knees revised to total knees reported to the Norwegian Arthroplasty Register (1994-2011).. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr et al. (2015). Addition of patella Component in painful non-resurfaced TKAs; does it helps?. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr et al. (2015). The outcome of unicompartmental knee arthroplastis after aseptic revision into total knee arthroplasties.. (external link)
• Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr et al. (2014). Revisjon av total kneprotese uten patellakomponent med kun innsetting av patellakomponent.. (external link)
• Persson, Andreas; Fjeldsgaard, Knut; Gjertsen, Jan-Erik et al. (2014). Increased risk of revision with hamstring graft compared to patellar graft after anterior cruciate ligament reconstruction; a study of 12,643 cases from the Norwegian Cruciate Ligament Registry 2004–2012. (external link)

Poster

• Andreasen, Camilla; Dahl, Cecilie; Frihagen, Frede et al. (2023). Fracture Liaison Services and Subsequent Fracture Risk: a multicenter, pragmatic, Stepped-Wedge Cluster-Randomized controlled trial. (external link)
• Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal et al. (2019). Individuals with Central Fractures have More Prevalent Vertebral Fractures, Lower Trabecular Bone Score and Lower BMD than Individuals with Peripheral Fractures: a Sub-study of NoFRACT. (external link)
• Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal et al. (2019). Determinants of Trabecular Bone Score and Vertebral Fracture Status in Women With Fragility Fractures: A Cross-sectional Sub-study of NoFRACT. (external link)

Academic literature review

• Leta, Tesfaye Hordofa; Gjertsen, Jan-Erik; Dale, Håvard et al. (2021). Antibiotic-loaded bone cement in prevention of periprosthetic joint infections in primary total knee arthroplasty: A register-based multicentre randomised controlled non-inferiority trial (ALBA trial). (external link)

Reader opinion piece

• Kristensen, Torbjørn; Gjertsen, Jan-Erik (2020). Valg av protese ved lårhalsbrudd | Tidsskrift for Den norske legeforeningValg av protese ved lårhalsbrudd. (external link)
• Kristensen, Torbjørn; Dybvik, Eva Hansen; Kristoffersen, Målfrid Holen et al. (2020). Reply to the Letter to the Editor: Cemented or uncemented Hemiarthroplasty for femoral neck fracture? Data from the Norwegian Hip Fracture Register. (external link)
• Hedström, Margareta; Ekström, Wilhelmina; Al-Ani, Amer et al. (2019). High failure rate after internal fixation and beneficial outcome after arthroplasty in treatment of displaced femoral neck fractures in patients between 55 and 70 years. (external link)
• Lie, Stein Atle; Havelin, Leif Ivar; Fenstad, Anne Marie et al. (2014). Re: a statistical analysis of ankle prosthesis from the Norwegian Arthroplasty Register. (external link)
• Matre, Kjell; Havelin, Leif Ivar; Gjertsen, Jan-Erik et al. (2013). Reply to Letter to the Editor: Intramedullary Nails Result in More Reoperations Than Sliding Hip Screws in Two-part Intertrochanteric Fractures. (external link)
• Gjertsen, Jan-Erik; Lie, Stein Atle; Vinje, Tarjei et al. (2013). Authors' reply Cobb correspondence re: J-E. Gjertsen, S. A. Lie, T. Vinje, et al. More re-operations after uncemented than cemented hemiarthroplasty used in the treatment of displaced fractures of the femoral neck: An observational study of 11 116 hemiarthroplasties from a national register. J Bone Joint Surg [Br] 2012;94-B:1113-1119. (external link)

Editorial

• Kristensen, Torbjørn; Gjertsen, Jan-Erik (2020). Valg av protese ved lårhalsbrudd. (external link)
• Gjertsen, Jan-Erik (2019). Should Total Hip Arthroplasty Be Used for Hip Fracture?. (external link)

Errata

• Leer-Salvesen, Sunniva; Dybvik, Eva Hansen; Ranhoff, Anette Hylen et al. (2020). Correction to: Do direct oral anticoagulants (DOACs) cause delayed surgery, longer length of hospital stay, and poorer outcome for hip fracture patients? (European Geriatric Medicine, (2020), 10.1007/s41999-020-00319-w). (external link)

Lecture

• Djuv, Ane; Fosse, Lars; Paulsen, Aksel et al. (2019). Retrospektiv pilotstudie for komplikasjoner ved ustabile trokantære frakturer operert med margnagle eller protese. (external link)

Academic chapter/article/Conference paper

• Persson, A; Fjeldsgaard, Knut; Gjertsen, Jan-Erik et al. (2016). New trauma is the most common cause of revision after primary anterior cruciate ligament reconstruction - a study from the Norwegian knee ligament registry 2004-2015. (external link)

Doctoral dissertation

• Gjertsen, Jan-Erik (2009). Surgical treatment of hip fractures in Norway. (external link)

See a complete overview of publications in Cristin.