Academic article

• Kari Indrekvam; O.S. Husby; N. R. Gjerdet et al. (1991). Age-dependent mechnical properties of rat femur. (external link)
• Paul Johan Høl; Geir Hallan; Ove Nord Furnes et al. (2022). Similarly low-blood metal ion levels at 10-years follow-up of total hip arthroplasties with Oxinium, CoCrMo, and stainless steel femoral heads. Data from a randomized clinical trial. (external link)
• Christian Hellum; Frode Gurvin Rekeland; Milada Cvancarova Småstuen et al. (2023). Surgery in Degenerative Spondylolisthesis: Does fusion improve outcome in subgroups? A secondary analysis from a randomized trial (NORDSTEN trial). (external link)
• Hasan Banitalebi; Jørn Ståle Aaen; Kjersti Storheim et al. (2022). A novel MRI index for paraspinal muscle fatty infiltration: reliability and relation to pain and disability in lumbar spinal stenosis: results from a multicentre study. (external link)
• Clemens Weber; Erland Hermansen; Tor Åge Myklebust et al. (2024). Comparison of Patients Operated for Lumbar Spinal Stenosis with and Without Spondylolisthesis: A Secondary Analysis of the NORDSTEN Trials. (external link)
• Knut Harboe; Nils Roar Gjerdet; Einar Sudmann et al. (2014). Assessment of retention force and bone apposition in two differently coated femoral stems after 6 months of loading in a goat model. (external link)
• Erland Hermansen; Ulla Kristina Romild; Ivar Magne Austevoll et al. (2016). Does surgical technique influence clinical outcome after lumbar spinal stenosis decompression? A comparative effectiveness study from the Norwegian Registry for Spine Surgery. (external link)
• Paul Johan Høl; Geir Hallan; Kari Indrekvam (2021). Metallionenivåer i blod fra pasienter med metall-mot-metall-hofteprotese. (external link)
• Håkon Greve Johannessen; Geir Hallan; Thomas Istvan Edelsvärd Kadar et al. (2024). Polyethylene wear and cup migration of cemented total hip arthroplasty with femoral heads made of oxidized zirconium, steel, or cobalt chromium: a 10-year secondary analysis from a randomized trial using radiostereometry. (external link)
• Erland Hermansen; Ivar Magne Austevoll; Ulla Kristina Romild et al. (2017). Study-protocol for a randomized controlled trial comparing clinical and radiological results after three different posterior decompression techniques for lumbar spinal stenosis: the Spinal Stenosis Trial (SST) (part of the NORDSTEN Study). (external link)
• Ivar Magne Austevoll; Erland Hermansen; Morten Fagerland et al. (2019). Decompression alone versus decompression with instrumental fusion the NORDSTEN degenerative spondylolisthesis trial (NORDSTEN-DS); study protocol for a randomized controlled trial. (external link)
• Jørn Ståle Aaen; Hasan Banitalebi; Ivar Magne Austevoll et al. (2022). The association between preoperative MRI findings and clinical improvement in patients included in the NORDSTEN spinal stenosis trial. (external link)
• Jørn Aaen; Ivar Magne Austevoll; Christian Hellum et al. (2021). Clinical and MRI findings in lumbar spinal stenosis: baseline data from the NORDSTEN study. (external link)
• Kari Indrekvam; Inger Vikøyr; Rolv Terje Lie et al. (1991). Age-related differences in chemical composition of rat femur as determinants for strain. (external link)
• Thomas Kadar; Ove Furnes; Arild Aamodt et al. (2012). The influence of acetabular inclination angle on the penetration of polyethylene and migration of the acetabular component: A prospective, radiostereometric study on cemented acetabular components. (external link)
• Mona Badawy; Birgitte Espehaug; Kari Indrekvam et al. (2013). Influence of hospital volume on revision rate after total knee arthroplasty with cement. (external link)
• Hasan Banitalebi; Ansgar Espeland; Masoud D Anvar et al. (2022). Reliability of preoperative MRI findings in patients with lumbar spinal stenosis. (external link)
• Erland Hermansen; Gunnar Moen; Anne Marie Fenstad et al. (2014). Spinous process osteotomy to facilitate the access to the spinal canal when decompressing the spinal canal in patients with lumbar spinal stenosis.. (external link)
• Erland Hermansen; Tor Åge Myklebust; Ivar Magne Austevoll et al. (2024). Dural Sac Cross-sectional area change from preoperatively and up to 2 years after decompressive surgery for central lumbar spinal stenosis: investigation of operated levels, data from the NORDSTEN study. (external link)
• Maren Falch Lindberg; Arild Aamodt; Mona Badawy et al. (2021). The effectiveness of exercise therapy and education plus cognitive behavioral therapy, alone or in combination with total knee arthroplasty in patients with knee osteoarthritis – study protocol for the MultiKnee trial. (external link)
• Mona Badawy; Anne Marie Fenstad; Christoffer Bartz-Johannessen et al. (2017). Hospital volume and the risk of revision in Oxford unicompartmental knee arthroplasty in the Nordic countries -an observational study of 14,496 cases. (external link)
• Fred-Arild Ravnskog; Birgitte Espehaug; Kari Indrekvam (2011). Randomised clinical trial comparing hydrofiber and alginate dressings post hip replacement. (external link)
• Veronika Dybvik; Erland Hermansen; Hasan Banitalebi et al. (2023). Is Repeated Preoperative Magnetic Resonance Imaging Necessary Before Planned Decompressive Surgery for Lumbar Spinal Stenosis?. (external link)
• Kari Indrekvam; N. R. Gjerdet; Lars B. Engesæter et al. (1991). Effects of intramedullary reaming and nailing of rat femur. A mechanical and chemical study. (external link)
• Turid Rognsvåg; Maren Falch Lindberg; Anners Lerdal et al. (2021). Development of an internet-delivered cognitive behavioral therapy program for use in combination with exercise therapy and education by patients at increased risk of chronic pain following total knee arthroplasty. (external link)
• Knut Harboe; Christian Lycke Ellingsen; Einar Sudmann et al. (2015). Can bone apposition predict the retention force of a femoral stem? An experimental weight-bearing hip-implant model in goats.. (external link)
• Sara Tronstad; Knut Jørgen Haug; Tor Åge Myklebust et al. (2024). Do patients with lumbar spinal stenosis benefit from decompression of levels with adjacent moderate stenosis? A prospective cohort study from the NORDSTEN study. (external link)
• Andreas Ottersen Seip; Christian Hellum; Morten Fagerland et al. (2025). Surgeon Recommendation and Outcomes of Decompression With vs Without Fusion in Patients With Degenerative Spondylolisthesis. (external link)
• Erland Hermansen; Tor Åge Myklebust; Clemens Weber et al. (2023). Postoperative Dural Sac Cross-Sectional Area as an Association for Outcome After Surgery for Lumbar Spinal Stenosis: Clinical and Radiological Results From the NORDSTEN-Spinal Stenosis Trial. (external link)
• Thomas Kadar; Geir Hallan; Arild Aamodt et al. (2011). A randomized study on migration of the Spectron EF and the Charnley flanged 40 cemented femoral components using radiostereometric analysis at 2 years. (external link)
• Johan Wänman; Josefin Åkerstedt; Hasan Banitalebi et al. (2024). The association between lumbar lordosis preoperatively and changes in PROMs for lumbar spinal stenosis patients 2 years after spinal surgery: radiological and clinical results from the NORDSTEN-spinal stenosis trial. (external link)
• Kari Indrekvam; Jon Lekven; Lars B. Engesæter et al. (1992). Effects of intramedullary reaming and nailing on blood flow in rat femora. (external link)
• Ivar Magne Austevoll; Rolf Gjestad; Jens Ivar Brox et al. (2016). The effectiveness of decompression alone compared with additional fusion for lumbar spinal stenosis with degenerative spondylolisthesis: a pragmatic comparative non-inferiority observational study from the Norwegian Registry for Spine Surgery. (external link)
• Kari Indrekvam; Ingrid Fjeldheim Bånerud; Erland Hermansen et al. (2023). The Norwegian degenerative spondylolisthesis and spinal stenosis (NORDSTEN) study: study overview, organization structure and study population. (external link)
• Erland Hermansen; Eric Franssen; Tor Åge Myklebust et al. (2025). No long term benefit of decompression of a borderline lumbar spinal stenosis level adjacent to a more stenotic index level. (external link)
• Erland Hermansen; Ivar Magne Austevoll; Christian Hellum et al. (2022). Comparison of 3 Different Minimally Invasive Surgical Techniques for Lumbar Spinal Stenosis: A Randomized Clinical Trial. (external link)
• Håkon Greve  Johannessen; Geir Hallan; Thomas Istvan Edelsvärd Kadar et al. (2025). Early cup migration and wear as predictors for later aseptic loosening: a secondary evaluation of a randomized controlled RSA trial on cemented hip arthroplasties with 18-year follow-up. (external link)
• Erland Hermansen; Gunnar Moen; Johan Barstad et al. (2013). Laminarthrectomy as a surgical approach for decompressing the spinal canal: assessment of preoperative versus postoperative dural sac cross-sectional areal (DSCSA). (external link)
• Mona Badawy; Birgitte Espehaug; Anne Marie Fenstad et al. (2017). Patient and surgical factors affecting procedure duration and revision risk due to deep infection in primary total knee arthroplasty.. (external link)
• Turid Rognsvåg; Ingvild Buset Bergvad; Ove Nord Furnes et al. (2024). Exercise therapy, education, and cognitive behavioral therapy alone, or in combination with total knee arthroplasty, in patients with knee osteoarthritis: a randomized feasibility study. (external link)
• Mona Badawy; Anne Marie Fenstad; Kari Indrekvam et al. (2015). The risk of revision in total knee arthroplasty is not affected by previous high tibial osteotomy. (external link)
• Erland Hermansen; Kari Indrekvam; Eric Franssen et al. (2024). A randomized trial on three different minimally invasive decompression techniques for lumbar spinal stenosis. Five years follow-up from the NORDSTEN-SST. (external link)
• Eric Franssen; Clemens Weber; Tor Åge Myklebust et al. (2024). Clinical importance of redundant nerve roots in patients with symptomatic lumbar spinal stenosis: A secondary analysis of NORDSTEN spinal stenosis trial data. (external link)
• Thomas Kadar; Geir Hallan; Arild Aamodt et al. (2011). Wear and migration of highly cross-linked and conventional cemented polyethylene cups with cobalt chrome or Oxinium femoral heads: A randomized radiostereometric study of 150 patients. (external link)
• Hasan Banitalebi; Erland Hermansen; Christian Hellum et al. (2024). Preoperative fatty infiltration of paraspinal muscles assessed by MRI is associated with less improvement of leg pain 2 years after surgery for lumbar spinal stenosis. (external link)
• Erland Hermansen; Ivar Magne Austevoll; Christian Hellum et al. (2020). Comparable increases in dural sac area after three different posterior decompression techniques for lumbar spinal stenosis: radiological results from a randomized controlled trial in the NORDSTEN study. (external link)
• Emil Mohr; Kari Indrekvam (1996). Kvalitetssikring av hofteprotesekirurgi. (external link)
• Helena Brisby; Tor Åge Myklebust; HASAN BANITALEBI et al. (2024). Adjacent Level Canal Area Changes up to Two Years After Lumbar Spinal Stenosis Decompressive Surgery. (external link)
• Mona Badawy; Birgitte Espehaug; Kari Indrekvam et al. (2014). Higher revision risk for unicompartmental knee arthroplasty in low-volume hospitals. (external link)
• Sondre Hagerup; Jens Ivar Brox; Hasan Banitalebi et al. (2024). The Influence of Spinous Process Union on Clinical Outcomes After Spinous Process Osteotomy for Lumbar Spinal Stenosis After 2 Years: A Secondary Analysis From the NORDSTEN-Study. (external link)
• Kari Indrekvam; Inger Vikøyr; R. T. Vie et al. (1991). Age-related differences in chemical composition of rat femur as determinants for strain. (external link)
• Ivar Magne Austevoll; Rolf Gjestad; Tore Solberg et al. (2020). Comparative effectiveness of microdecompression alone vs decompression plus instrumented fusion in lumbar degenerative spondylolisthesis. (external link)
• Benedikt Arni Jonsson; Thomas Kadar; Leif Ivar Havelin et al. (2015). Oxinium modular femoral heads do not reduce polyethylene wear in cemented total hip arthroplasty at five years: A randomised trial of 120 hips using radiostereometric analysis. (external link)
• Eric Loratang Kgomotso; Christian Hellum; Morten Fagerland et al. (2024). Decompression alone or with fusion for degenerative lumbar spondylolisthesis (Nordsten-DS): five year follow-up of a randomised, multicentre, non-inferiority trial. (external link)
• Ivar Magne Austevoll; Erland Hermansen; Morten Wang Fagerland et al. (2021). Decompression with or without Fusion in Degenerative Lumbar Spondylolisthesis. (external link)
• Erland Hermansen; Tor Åge Myklebust; Ivar Magne Austevoll et al. (2019). Clinical outcome after surgery for lumbar spinal stenosis in patients with insignificant lower extremity pain. A prospective cohort study from the Norwegian registry for spine surgery. (external link)
• Kari Indrekvam; N. R. Gjerdet; Lars B. Engesæter et al. (1991). Effects of intramedullary reaming and nailing of rat femur. A mechanical and chemical study. (external link)
• Kari Indrekvam; Inger Vikøyr; Rolv Terje Lie et al. (1991). Age-related differences in biochemical composition of rat femur as determinants for strain. (external link)
• Kari Indrekvam; O. S. Husby; N. R. Gjerdet et al. (1991). Age-dependent mechanical properties of rat femur measured in vivo and in vitro. (external link)
• Jørn Ståle Aaen; Hasan Banitalebi; Ivar Magne Austevoll et al. (2023). Is the presence of foraminal stenosis associated with outcome in lumbar spinal stenosis patients treated with posterior microsurgical decompression. (external link)
• Ivar Magne Austevoll; Rolf Gjestad; Margreth Grotle et al. (2019). Follow-up score, change score or percentage change score for determining clinical important outcome following surgery? An observational study from the Norwegian registry for Spine surgery evaluating patient reported outcome measures in lumbar spinal stenosis and lumbar degenerative spondylolisthesis. (external link)
• Lene Bjerke Laborie; Trond Markestad; Henrik Davidsen et al. (2014). Selective ultrasound screening for developmental hip dysplasia: Effect on management and late detected cases. A prospective survey during 1991-2006. (external link)
• Helena Brisby; Tor Åge Myklebust; Hasan Banitalebi et al. (2024). Adjacent Level Canal Area Changes up to 2 years after Lumbar Spinal Stenosis Decompressive Surgery. (external link)
• Kari Indrekvam; Tor Åge Myklebust; Ivar Magne Austevoll et al. (2024). Responsiveness of the Oswestry Disability Index and Zurich Claudication Questionnaire in patients with lumbar spinal stenosis: evaluation of surgically treated patients from the NORDSTEN study. (external link)
• Ari Bertz; Kari Indrekvam; Mohamed Ahmed et al. (2012). Validity and reliability of preoperative templating in total hip arthroplasty using a digital templating system. (external link)

Conference lecture

• Turid Rognsvåg; Maren Falch Lindberg; Anners Lerdal et al. (2022). Development of an internet-delivered cognitive behavioral therapy program for use in combination with exercise therapy and education by patients at increased risk of chronic pain following total knee arthroplasty. (external link)
• Mohamed Ahmed; Erland Hermansen; Ivar Magne Austevoll et al. (2012). Norsk spinal stenose studie. (external link)
• Guri Ellingsen; Marte Christensen; Kari Indrekvam (2006). Proximal valgiserende tibiaosteotomi som behandling av gonarthrose. (external link)
• Paul Johan Høl; Kari Indrekvam; Roel Bierling et al. (2013). Metallkonsentrasjon i blod hos pasienter med "Birmingham resurfacing" hofteprotese. En prospektiv longitudinell studie i en norsk cohort. (external link)
• Erland Hermansen; Gunnar Moen; Rune Birketvedt et al. (2010). Laminarthrectomi som kirurgisk tilgang for å dekompremere spinalkanalen. Vurdering av preoperativt versus postoperativt Dural Sac Cross Sectional Area (DSCSA). (external link)
• Mona Badawy; Birgitte Espehaug; Kari Indrekvam et al. (2012). Revision rate is influenced by hospital and surgeon volume in Unicompartmental Knee Arthroplasty. (external link)
• Andreas Ottersen Seip; Peter Ellison; Anders Mølster et al. (2012). Mechanical properties of spinal implants. (external link)
• Thomas Kadar; Leif Ivar Havelin; Kari Indrekvam et al. (2011). Betydningen av sementerte koppers inklinasjonsvinkel på plastslitasje og koppmigrasjon. En prospektiv randomisert studie. (external link)
• Målfrid Holen Kristoffersen; Mona Badawy; Roel Bierling et al. (2010). Proteseluksasjoner etter overgang til bakre tilgang. En kvalitetskontroll av primærproteser operert med direkte lateral tilgang i 2004 og bakre tilgang i 2009 ved Kysthospitalet i Hagevik. (external link)
• Erland Hermansen; Ivar Magne Austevoll; Christian Hellum et al. (2012). Norsk spinal stenose studie. Resultater etter tre ulike kirurgiske metoder for behandling av lumbal spinal stenose. En randomisert studie som sammenligner laminarthrectomi, bilateral laminotomi og unilateral laminotomi med crossover. (external link)
• Paul Johan Høl; Geir Hallan; Ove Nord Furnes et al. (2020). Metallionenivåer i blod etter 10 år med hofteproteser med ulike hodematerialer. (external link)
• Thomas Kadar; Geir Hallan; Arild Aamodt et al. (2010). A randomized study of the Spectron EF and the Charnley flanged 40 cemented femoral components. (external link)
• Erland Hermansen; Gunnar Moen; Rune Birketvedt et al. (2010). Laminartrectomi som kirurgisk tilgang for å dekompremere spinal kanalen. Vurdering av ostetomitilheling på processus spinosus. (external link)
• Mona Badawy; Birgitte Espehaug; Kari Indrekvam et al. (2011). Er risikoen for revisjon større ved lavt sykehus og kirurgvolum ved unicondylære proteser. (external link)
• Ivar Magne Austevoll; Kari Indrekvam; Oliver Müller et al. (2012). Degenerativ pondylolisthese: Er det nødvendig å gjøre fiksasjon i tillegg til dekompresjon? Presentasjon av planlagt norsk multisenterstudie. (external link)
• Vegard Pihl Moen; Mona Badawy; Kari Indrekvam et al. (2014). Utarbeidelse av norsk versjon av «Forgotten Joint Score». (external link)
• Håkon Greve Johannessen; Thomas Kadar; Geir Hallan et al. (2021). Polyethylene wear in total hip arthroplasty; comparing Oxinium and CoCr femoral heads using radiostereometry with 10 years follow-up. (external link)
• Paul Johan Høl; Kari Indrekvam; Roel Bierling et al. (2016). Metallionenivåer i blod over 5 år med "Birmingham resurfacing" hofteprotese. (external link)
• Hasan Banitalebi; Erland Hermansen; Christian Hellum et al. (2023). Fatty Infiltration of the Paraspinal Muscles Is Associated with Postoperative Leg Pain in Lumbar Spinal Stenosis. (external link)
• Andreas Ottersen Seip; Peter Ellison; Anders Mølster et al. (2012). Mekanisk testing av pedikkelsskruekonstruksjoner. (external link)
• Mona Badawy; Birgitte Espehaug; Kari Indrekvam et al. (2012). Revision rate is influenced by hospital and surgeon volume in total knee arthroplasty. (external link)
• Ari Bertz; Kari Indrekvam; Mohamed Ahmed et al. (2011). Nøyaktighet av preoperativ digital planlegging ved innsetting av total protese i hofteleddet ved bruk av MDesk system. (external link)
• Mona Badawy; Birgitte Espehaug; Kari Indrekvam et al. (2010). Operasjonsvolum av totale kneproteser i Nore 1994- 2009. (external link)
• Mona Badawy; Birgitte Espehaug; Kari Indrekvam et al. (2011). Impact of procedure volume on the results of total knee arthroplasty. (external link)
• Ø Gøthesen; Kari Indrekvam; Sjur Braaten (2006). Direkte reparasjon av buedefekt. (external link)

Conference poster

• Håkon Greve Johannessen; Thomas Kadar; Geir Hallan et al. (2022). Polyethylene Wear In Total Hip Arthroplasty; Comparing Oxinium And CoCr Femoral Heads Using Radiostereometry With 10 Years Follow-Up. (external link)
• Hasan Banitalebi; Erland Hermansen; Christian Hellum et al. (2023). Association between preoperative fatty infiltration of the paraspinal muscles and persistent leg pain after surgery for LSS. (external link)
• Maren Falch Lindberg; Turid Rognsvåg; Mona Badawy et al. (2019). Optimal behandling av artrosepasienter - en feasibilitystudie (MultiKnee trial). (external link)
• Erland Hermansen; Gunnar Moen; Rune Birketvedt et al. (2012). Lamiarthrectomi as a surgical approach for decompressing the spinal canal. Assessment of preoperative versus postoperative Dural Sac Cross Sectional Area (DSCSA). (external link)
• Turid Rognsvåg; Maren Falch Lindberg; Petter Chr. Borchgrevink et al. (2018). Multi-Knee Trial. En feasibilty-studie av en intervensjon for artrosepasienter med økt risiko for langvarige smerter etter operasjon med kneprotese. (external link)
• Mona Badawy; Birgitte Espehaug; Kari Indrekvam et al. (2012). Revision rate is influenced by hospital and surgeon volume in total knee arthroplasty. (external link)
• Thomas Kadar; Geir Hallan; Arild Aamodt et al. (2011). A randomized study on migration of the Spectron EF and the Charnley flanged 40 cemented femoral components using radiostereometric analysis at 2 years. (external link)
• Thomas Kadar; Geir Hallan; Arild Aamodt et al. (2010). Wear of highly cross-linked and conventional ultra-high molecular weight semented polyethylene cups with oxidized zirconium (Oxinium) or Cobalt Chrome femoral heads. A randomized study of 150 hips using radiostereometric analysis. (external link)
• Turid Rognsvåg; Ingvild Buset Bergvad; Ove Nord Furnes et al. (2022). Effekt av trening, undervisning og kognitiv adferdsterapi for artrosepasienter med eller uten totalprotese i kne: En randomisert feasibility studie. (external link)

Journal corrigendum

• Erland Hermansen; Kari Indrekvam; Eric Franssen et al. (2025). Correction to: ISSLS Prize in Clinical Science 2025: A randomized trial on three different minimally invasive decompression techniques for lumbar spinal stenosis. Five years follow-up from the NORDSTEN-SST (European Spine Journal, (2024), 10.1007/s00586-024-08514-0). (external link)

Doctoral thesis (PhD)

• Kari Indrekvam (1992). Determinants for bone strength and repair. A mechanical and chemical study in rat femur. (external link)
• Knut Harboe; Einar Sudmann; Kari Indrekvam (2015). Developing a novel femoral stem in hip arthroplasty. An innovation process using a weight-bearing animal model. (external link)
• Erland Hermansen; Kari Indrekvam (2018). Clinical and radiological results after three different posterior decompression techniques for lumbar spinal stenosis. (external link)

Popular science book chapter

• Kari Indrekvam (2007). Kysthospitalet i Hagevik. (external link)
• Kari Indrekvam (2007). Norsk ortopedisk forening 60 år. (external link)

Letter to the editor

• Josefin Åkerstedt; Johan Wänman; Hasan Banitalebi et al. (2025). Change in Lumbar Lordosis After Decompressive Surgery in Lumbar Spinal Stenosis Patients and Associations With Patient-Related Outcomes Two Years After Surgery: Radiologic and Clinical Results From the NORDSTEN Spinal Stenosis Trial. (external link)
• Erland Hermansen; Kari Indrekvam; Clemens Weber et al. (2024). Postoperative Dural Sac Cross-sectional Area as an Association for Outcome After Surgery for Lumbar Spinal Stenosis. (external link)

Conference abstract

• Andreas Ottersen Seip; Tore Solberg; Jens Ivar Brox et al. (2024). P293. Surgeons’ selection of the right patient for fusion surgery for degenerative spondylolisthesis. (external link)

Research report

• Kari Indrekvam; K Svendsen; Arild Aamodt et al. (2009). Prioritering i spesialisthelsetjenesten. Prioriteringsveileder ortopedi. (external link)

Academic book chapter

• Kari Indrekvam; Norvald Langeland (1993). Age-dependent changes of the rat femur. (external link)

See a complete overview of publications in Cristin.