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Jan-Erik Gjertsen

Associate Professor
  • E-mailJan-Erik.Gjertsen@uib.no
  • Phone+47 957 80 782
  • Visitor Address
    Haukeland Universitetssykehus Laboratoriebygget, 7. etg. Heis øst
  • Postal Address
    Postboks 7804
    5020 Bergen
Academic article
  • Pollmann, Christian Thomas; Dahl, Fredrik Andreas; Røtterud, Jan H; Gjertsen, Jan Erik; Årøen, Asbjørn. 2020. Surgical site infection after hip fracture – mortality and risk factors: an observational cohort study of 1,709 patients. Acta Orthopaedica.
  • Kristoffersen, Målfrid Holen; Dybvik, Eva Hansen; Steihaug, Ole Martin; Bartz-Johannessen, Christoffer; Martinsen, Mette; Ranhoff, Anette Hylen; Engesæter, Lars B.; Gjertsen, Jan-Erik. 2019. Validation of orthopaedic surgeons' assessment of cognitive function in patients with acute hip fracture. BMC Musculoskeletal Disorders. 8 pages.
  • Chokotho, Linda; Lau, Brian C.; Conway, Devin; Wu, Hao-Hua; Shearer, David; Hallan, Geir; Gjertsen, Jan-Erik; Mkandawire, Nyengo; Young, Sven. 2019. Validation of chichewa short musculoskeletal function assessment (SMFA) questionnaire: A cross-sectional study. Malawi Medical Journal. 65-70.
  • Jobory, Ammar; Kärrholm, Johan; Overgaard, Søren; Pedersen, Alma Becic; Hallan, Geir; Gjertsen, Jan-Erik; Mäkelä, Keijo; Rogmark, Cecilia. 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). Journal of Bone and Joint Surgery. American volume. 1278-1285.
  • Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal; Andreasen, Camilla; Brunborg, Cathrine; Stenbro, May-Britt; Hübschle, Lars Michael; Froholdt, Anne; Figved, Wender; Apalset, Ellen Margrete; Gjertsen, Jan-Erik; Basso, Trude; Lund, Ida; Hansen, Ann Kristin; Stutzer, Jens-Meinhard; Omsland, Tone Kristin; Nordsletten, Lars; Frihagen, Frede Jon; Eriksen, Erik Fink. 2019. Post-Fracture Risk Assessment: Target The Centrally Sited Fractures First! A Substudy of NoFRACT. Journal of Bone and Mineral Research. 2036-2044.
  • Dale, Håvard; Børsheim, Sjur; Kristensen, Torbjørn; Fenstad, Anne Marie; Gjertsen, Jan-Erik; Hallan, Geir; Lie, Stein Atle; Furnes, Ove. 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. Acta Orthopaedica. 1-8.
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Schrama, Johannes Cornelis; Hallan, Geir; Gjertsen, Jan-Erik; Dale, Håvard; Furnes, Ove. 2019. Outcome of revision surgery for infection after total knee arthroplasty: Results of 3 surgical strategies. Journal of bone and joint surgery reviews (JBJS Reviews). 1-10.
  • Pedersen, Alma B.; Andersen, Ina Trolle; Overgaard, Søren; Fenstad, Anne Marie; Lie, Stein Atle; Gjertsen, Jan-Erik; Furnes, Ove. 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. Acta Orthopaedica. 298-305.
  • Bartels, Stefan; Gjertsen, Jan-Erik; Frihagen, Frede Jon; Rogmark, Cecilia; Utvåg, Stein-Erik. 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. BMC Musculoskeletal Disorders. 1-8.
  • Boutera, Andrea; Dybvik, Eva Hansen; Hallan, Geir; Gjertsen, Jan-Erik. 2019. Is there a weekend effect after hip fracture surgery? A study of 74,410 hip fractures reported to the Norwegian Hip Fracture Register. Acta Orthopaedica. 63-68.
  • Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal; Andreasen, Camilla; Brunborg, Cathrine; Stenbro, May-Britt; Hübschle, Lars Michael; Froholdt, Anne; Figved, Wender; Apalset, Ellen M; Gjertsen, Jan-Erik; Basso, Trude; Lund, Ida; Hansen, Ann Kristin; Stutzer, Jens-Meinhard; Dahl, Cecilie; Omsland, Tone Kristin; Nordsletten, Lars; Frihagen, Frede Jon; Eriksen, Erik Fink. 2019. High prevalence of vertebral fractures and low trabecular bone score in patients with fragility fractures: A cross-sectional sub-study of NoFRACT. Bone. 14-21.
  • Dale, Håvard; Børsheim, Sjur; Kristensen, Torbjørn; Fenstad, Anne Marie; Gjertsen, Jan-Erik; Hallan, Geir; Lie, Stein Atle; Furnes, Ove. 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. Acta Orthopaedica. 1-10.
  • Pollmann, Christian Thomas; Røtterud, Jan H; Gjertsen, Jan-Erik; Dahl, Fredrik Andreas; Lenvik, Olav; Årøen, Asbjørn. 2019. Fast track hip fracture care and mortality – an observational study of 2230 patients. BMC Musculoskeletal Disorders. 10 pages.
  • Leer-Salvesen, Sunniva; Engesæter, Lars B.; Dybvik, Eva Hansen; Furnes, Ove; Kristensen, Torbjørn; Gjertsen, Jan-Erik. 2019. Does time from fracture to surgery affect mortality and intraoperative medical complications for hip fracture patients? The Bone & Joint Journal. 1129-1137.
  • Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal; Andreasen, Camilla; Brunborg, Cathrine; Stenbro, May-Britt; Hübschle, Lars Michael; Figved, Wender; Apalset, Ellen Margrete; Gjertsen, Jan Erik; Basso, Trude; Lund, Ida; Hansen, Ann Kristin; Stutzer, Jens-Meinhard; Dahl, Cecilie; Nordsletten, Lars; Frihagen, Frede Jon; Eriksen, Erik Fink. 2019. Determinants of trabecular bone score and prevalent vertebral fractures in women with fragility fractures: a cross-sectional sub-study of NoFRACT. Osteoporosis International. 1-10.
  • Refsum, Anders Myhre; Nguyen, Uy Viet; Gjertsen, Jan Erik; Espehaug, Birgitte; Fenstad, Anne Marie; Lein, Regina Küfner; Ellison, Peter; Høl, Paul Johan; Furnes, Ove. 2019. Cementing technique for primary knee arthroplasty: a scoping review. Acta Orthopaedica. 582-589.
  • Ngoie, Leonard Banza; Gallaher, Jared; Dybvik, Eva Hansen; Charles, Anthony; Halland, Geir; Gjertsen, Jan-Erik; Mkandawire, Nyengo; Varela, Carlos Gomes; Young, Sven. 2018. The rise in road traffic injuries in Lilongwe, Malawi: A snapshot of the growing epidemic of trauma in low income countries. International Journal of Surgery Open. 55-60.
  • Authen, Ane Lyseid; Dybvik, Eva Hansen; Furnes, Ove; Gjertsen, Jan-Erik. 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. Acta Orthopaedica. 496-502.
  • Parker, Martyn; Raval, Pradyumna; Gjertsen, Jan-Erik. 2018. Nail or plate fixation for A3 trochanteric hip fractures: A systematic review of randomised controlled trials. Injury. 1-5.
  • Kristensen, Torbjørn; Dybvik, Eva Hansen; Furnes, Ove; Engesæter, Lars B.; Gjertsen, Jan-Erik. 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. . The Bone & Joint Journal. 1565-1571.
  • Leer-Salvesen, Sunniva; Dybvik, Eva Hansen; Engesæter, Lars B.; Dahl, Ola Einar; Gjertsen, Jan-Erik. 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. Acta Orthopaedica. 615-621.
  • Andreasen, Camilla; Solberg, Lene Bergendal; Basso, Trude; Borgen, Tove Tveitan; Dahl, Cecilie; Wisløff, Torbjørn; Hagen, Gunhild; Apalset, Ellen M; Gjertsen, Jan-Erik; Figved, Wender; Hübschle, Lars Michael; Stutzer, Jens-Meinhard; Elvenes, Jan; Joakimsen, Ragnar Martin; Syversen, Unni; Eriksen, Erik Fink; Nordsletten, Lars; Frihagen, Frede Jon; Omsland, Tone Kristin; Bjørnerem, Åshild. 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. JAMA Network Open. 13 pages.
  • Chokotho, Linda; Mkandawire, Nyengo; Conway, Devin; Wu, Hao-Hua; Shearer, David D.; Halland, Geir; Gjertsen, Jan-Erik; Young, Sven; Lau, Brian C. 2017. Validation and reliability of the Chichewa translation of the EQ-5D quality of life questionnaire in adults with orthopaedic injuries in Malawi. Malawi Medical Journal. 84-88.
  • Johansen, Antony; Golding, David; Brent, Louise; Close, Jacqueline; Gjertsen, Jan-Erik; Holt, Graeme; Hommel, Ami; Pedersen, Alma B.; Röck, Niels Dieter; Thorngren, Karl-Göran. 2017. Using national hip fracture registries and audit databases to develop an international perspective. Injury. 2174-2179.
  • Kristensen, Torbjørn; Vinje, Tarjei; Havelin, Leif Ivar; Engesæter, Lars B.; Gjertsen, Jan-Erik. 2017. Posterior approach compared to Direct lateral approach resulted in better patient-reported outcome after hemiarthroplsty for femoral neck fracture. Acta Orthopaedica. 29-34.
  • Gjertsen, Jan-Erik; Dybvik, Eva Hansen; Furnes, Ove; Fevang, Jonas Meling; Havelin, Leif Ivar; Matre, Kjell; Engesæter, Lars B. 2017. Improved outcome after hip fracture surgery in Norway: 10-year results from the Norwegian Hip Fracture Register. Acta Orthopaedica. 505-511.
  • Bartels, Stefan; Gjertsen, Jan-Erik; Frihagen, Frede Jon; Rogmark, Cecilia; Utvåg, Stein-Erik. 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. Acta Orthopaedica. 53-58.
  • Gjertsen, Jan-Erik; Baste, Valborg; Fevang, Jonas Meling; Furnes, Ove; Engesæter, Lars B. 2016. Quality of life following hip fractures: Results from the Norwegian hip fracture register. BMC Musculoskeletal Disorders. 8 pages.
  • Leer-Salvesen, Sunniva; Dybvik, Eva Hansen; Dahl, Ola Einar; Gjertsen, Jan-Erik; Engesæter, Lars B. 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. Acta Orthopaedica. 48-54.
  • Kristensen, Torbjørn; Vinje, Tarjei; Havelin, Leif Ivar; Engesæter, Lars B.; Gjertsen, Jan-Erik. 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. Acta Orthopaedica. 29-34.
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr; Hallan, Geir; Gjertsen, Jan-Erik; Rokne, Berit; Furnes, Ove. 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). Journal of Bone and Joint Surgery. American volume. 431-440.
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr; Hallan, Geir; Gjertsen, Jan-Erik; Rokne, Berit; Furnes, Ove. 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). International Orthopaedics. 8 pages.
  • Rogmark, Cecilia; Fenstad, Anne Marie; Leonardsson, Olof; Engesæter, Lars B.; Kärrholm, Johan; Furnes, Ove; Garellick, Göran; Gjertsen, Jan Erik. 2014. Posterior approach and uncemented stems increases the risk of reoperation after hemiarthroplasties in elderly hip fracture patients. Acta Orthopaedica. 18-25.
  • Persson, Andreas; Fjeldsgaard, Knut; Gjertsen, Jan-Erik; Kjellsen, Asle; Engebretsen, Lars; Hole, Randi Margrete; Fevang, Jonas Meling. 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. American Journal of Sports Medicine. 285-291.
  • Gjertsen, Jan Erik; Fenstad, Anne Marie; Leonardsson, Olof; Engesæter, Lars B.; Kärrholm, Johan; Furnes, Ove; Garellick, Göran; Rogmark, Cecilia. 2014. Hemiarthroplasties after hip fractures in Norway and Sweden: A collaboration between the Norwegian and Swedish national registries. HIP International. 223-230.
  • Matre, Kjell; Havelin, Leif Ivar; Gjertsen, Jan-Erik; Furnes, Ove; Espehaug, Birgitte; Kjellevold, Stein Harald; Fevang, Jonas Meling. 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. Journal of Bone and Joint Surgery. American volume. 200-208.
  • Matre, Kjell; Havelin, Leif Ivar; Gjertsen, Jan-Erik; Vinje, Tarjei; Espehaug, Birgitte; Fevang, Jonas Meling. 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. Injury. 735-742.
  • Talsnes, Ove; Vinje, Tarjei; Gjertsen, Jan-Erik; Dahl, Ola Einar; Engesæter, Lars B.; Baste, Valborg; Pripp, Are Hugo; Reikerås, Olav. 2013. Perioperative mortality in hip fracture patients treated with cemented and uncemented hemiprosthesis: a register study of 11,210 patients. International Orthopaedics. 1135-1140.
  • Matre, Kjell; Havelin, Leif Ivar; Gjertsen, Jan-Erik; Espehaug, Birgitte; Fevang, Jonas Meling. 2013. Intramedullary nails result in more reoperations than sliding hip screws in two-part intertrochanteric fractures. Clinical Orthopaedics and Related Research. 1379-1386.
  • Gjertsen, Jan-Erik; Lie, Stein Atle; Vinje, Tarjei; Engesæter, Lars B.; Hallan, Geir; Matre, Kjell; Furnes, Ove. 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. Journal of Bone and Joint Surgery (JBJS).
  • Gjertsen, Jan-Erik; Fevang, Jonas Meling; Matre, Kjell; Vinje, Tarjei; Engesæter, Lars B. 2011. Clinical outcome after undisplaced femoral neck fractures. Acta Orthopaedica. 268-274.
  • Gjertsen, Jan-Erik; Vinje, Tarjei; Engesæter, Lars B.; Lie, Stein Atle; Havelin, Leif Ivar; Furnes, Ove Nord; Fevang, Jonas Meling. 2010. Internal screw fixation compared with bipolar hemiarthroplasty for treatment of displaced femoral neck fractures in elderly patients. Journal of Bone and Joint Surgery. American volume. 619-628.
  • Gjertsen, Jan-Erik; Engesæter, Lars B.; Furnes, Ove Nord; Havelin, Leif Ivar; Steindal, Kjersti; Vinje, Tarjei; Fevang, Jonas M. 2008. The Norwegian Hip Fracture Register - Experiences after the first 2 years and 15,576 reported operations. Acta Orthopaedica. 583-593.
  • Gjertsen, Jan-Erik; Vinje, Tarjei; Lie, Stein Atle; Engesæter, Lars B.; Havelin, Leif Ivar; Furnes, Ove Nord; Fevang, Jonas M. 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. Acta Orthopaedica. 594-601.
  • Høl, Paul Johan; Mølster, Anders; Gjerdet, Nils Roar; Bell, Karin; Sætersdal, Christian; Gjertsen, Jan-Erik. 2006. Hip fracture implants increase serum metal levels. Scandinavian Journal of Clinical and Laboratory Investigation.
Academic lecture
  • Kjærvik, Cato; Stensland, Eva; Søreide, Odd; Gjertsen, Jan-Erik; Dybvik, Eva Hansen. 2019. Sykehusegenskaper påvirker overlevelse etter hoftebrudd.
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Høvding, Pål; Hallan, Geir; Gjertsen, Jan-Erik; Dale, Håvard; Furnes, Ove. 2018. Revision of infected total knee arthroplasty: Do surgical strategies matter?
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Høvding, Pål; Hallan, Geir; Gjertsen, Jan-Erik; Dale, Håvard; Furnes, Ove. 2018. Result of revision surgery for infected total knee arthroplasty. Do surgical strategies matter?
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Høvding, Pål; Hallan, Geir; Gjertsen, Jan-Erik; Dale, Håvard; Furnes, Ove. 2018. Outcome of revision surgery for infected total knee arthroplasty: Do surgical strategies matter?
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Håvding, Pål; Gjertsen, Jan-Erik; Hallan, Geir; Dale, Håvard; Furnes, Ove. 2017. Resultater ved revisjon for infisert kneprotese. En observasjons studie fra Nasjonalt Register for Leddproteser (1994-2016).
  • Persson, Andreas; Fjeldsgaard, Knut; Gjertsen, Jan-Erik; Engebretsen, Lars; Kjellsen, Asle; Fevang, Jonas Meling. 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.
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr; Hallan, Geir; Gjertsen, Jan-Erik; Rokne, Berit; Furnes, Ove. 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.
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr; Hallan, Geir; Gjertsen, Jan-Erik; Rokne, Berit; Furnes, Ove. 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).
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr; Hallan, Geir; Gjertsen, Jan-Erik; Rokne, Berit; Furnes, Ove. 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).
  • Persson, A; Fjeldsgaard, Knut; Gjertsen, Jan-Erik; Engebretsen, Lars; Kjellsen, AB; Fevang, Jonas Meling. 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.
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr; Hallan, Geir; Gjertsen, Jan-Erik; Rokne, Berit; Furnes, Ove. 2015. The outcome of unicompartmental knee arthroplastis after aseptic revision into total knee arthroplasties.
  • Leta, Tesfaye Hordofa; Skredderstuen, Arne Kr; Lygre, Stein Håkon Låstad; Hallan, Geir; Gjertsen, Jan-Erik; Rokne, Berit; Furnes, Ove. 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).
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr; Hallan, Geir; Gjertsen, Jan-Erik; Rokne, Berit; Furnes, Ove. 2015. Sammenligning av 768 total- og 578 uni-kneproteser reviderte til total kneproteser fra Nasjonalt Register for Leddproteser (1994-2011).
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr; Hallan, Geir; Gjertsen, Jan-Erik; Rokne, Berit; Furnes, Ove. 2015. Addition of patella Component in painful non-resurfaced TKAs; does it helps?
  • Leta, Tesfaye Hordofa; Lygre, Stein Håkon Låstad; Skredderstuen, Arne Kr; Halland, Geir; Gjertsen, Jan-Erik; Rokne, Berit; Furnes, Ove. 2014. Revisjon av total kneprotese uten patellakomponent med kun innsetting av patellakomponent.
  • Persson, Andreas; Fjeldsgaard, Knut; Gjertsen, Jan-Erik; Engebretsen, Lars; Kjellsen, Asle; Hole, Randi Margrete; Fevang, Jonas Meling. 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.
Editorial
  • Gjertsen, Jan-Erik. 2019. Should Total Hip Arthroplasty Be Used for Hip Fracture? New England Journal of Medicine. 2261-2262.
Reader opinion piece
  • Matre, Kjell; Havelin, Leif Ivar; Gjertsen, Jan-Erik; Espehaug, Birgitte; Fevang, Jonas Meling. 2013. Reply to Letter to the Editor: Intramedullary Nails Result in More Reoperations Than Sliding Hip Screws in Two-part Intertrochanteric Fractures. Clinical Orthopaedics and Related Research. 1735-1735.
Letter to the editor
  • Hedström, Margareta; Ekström, Wilhelmina; Al-Ani, Amer; Campenfeldt, Pierre; Bartels, Stefan; Gjertsen, Jan-Erik; Frihagen, Frede Jon; Rogmark, Cecilia; Utvåg, Stein-Erik. 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. Acta Orthopaedica. 94-95.
  • Lie, Stein Atle; Havelin, Leif Ivar; Fenstad, Anne Marie; Espehaug, Birgitte; Dybvik, Eva Hansen; Baste, Valborg; Engesæter, Lars B.; Skredderstuen, Arne Kr; Dale, Håvard; Fevang, Jonas Meling; Fevang, Bjørg-Tilde; Hallan, Geir; Gjertsen, Jan Erik; Furnes, Ove. 2014. Re: a statistical analysis of ankle prosthesis from the Norwegian Arthroplasty Register. Archives of Orthopaedic and Trauma Surgery. 17-18.
  • Gjertsen, Jan-Erik; Lie, Stein Atle; Vinje, Tarjei; Engesæter, Lars B.; Hallan, Geir; Matre, Kjell; Furnes, Ove. 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. The Bone & Joint Journal. 862.
Doctoral dissertation
  • Gjertsen, Jan-Erik. 2009. Surgical treatment of hip fractures in Norway.
Academic chapter/article/Conference paper
  • Persson, A; Fjeldsgaard, Knut; Gjertsen, Jan-Erik; Engebretsen, Lars; Kjellsen, AB; Fevang, Jonas Meling. 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.
Other
  • Persson, A; Fjeldsgaard, Knut; Gjertsen, Jan-Erik; Kjellsen, Asle; Engebretsen, Lars; Hole, R; Fevang, Jonas Meling. 2013. Økt risiko for revisjon med hamstringsgraft sammenlignet med patellarsenegraft ved primær fremre korsbåndsrekonstruksjon; en studie av 12 643 operasjoner fra nasjonalt korsbåndsregister 2004-2012.
Abstract
  • Persson, Andreas; Fjeldsgaard, Knut; Gjertsen, Jan-Erik; Engebretsen, Lars; Kjellsen, Asle; Fevang, Jonas Meling. 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. Arthroscopy: The Journal of Arthroscopy And Related. e139.
  • Persson, Andreas; Fjeldsgaard, Knut; Gjertsen, Jan-Erik; Engebretsen, Lars; Kjellsen, Asle; Hole, Randi Margrete; Fevang, Jonas Meling. 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. Knee Surgery, Sports Traumatology, Arthroscopy. S22-S23.
Poster
  • Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal; Brunborg, Cathrine; Andreasen, Camilla; Hübschle, Lars Michael; Stenbro, May-Britt; Apalset, Ellen Margrete; Gjertsen, Jan-Erik; Figved, Wender; Froholdt, Anne; Stutzer, Jens-Meinhard; Hansen, Ann Kristin; Omsland, Tone Kristin; Lund, Ida; Frihagen, Frede Jon; Nordsletten, Lars; Eriksen, Erik Fink. 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 .
  • Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal; Andreasen, Camilla; Brunborg, Cathrine; Hübschle, Lars Michael; Stenbro, May-Britt; Hansen, Ann Kristin; Apalset, Ellen Margrete; Gjertsen, Jan-Erik; Lund, Ida; Dahl, Cecilie; Figved, Wender; Stutzer, Jens-Meinhard; Frihagen, Frede Jon; Nordsletten, Lars; Eriksen, Erik Fink. 2019. Determinants of Trabecular Bone Score and Vertebral Fracture Status in Women With Fragility Fractures: A Cross-sectional Sub-study of NoFRACT .

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