• Anatomical variations in the circle of Willis are associated with increased odds of intracranial aneurysms: The Tromsø study 

      Hindenes, Lars Bakke; Ingebrigtsen, Tor; Isaksen, Jørgen Gjernes; Håberg, Asta; Johnsen, Liv-Hege; Herder, Marit; Mathiesen, Ellisiv B.; Vangberg, Torgil Riise (Peer reviewed; Journal article, 2023)
      Purpose Studies on patients suggest an association between anatomical variations in the Circle of Willis (CoW) and intracranial aneurysms (IA), but it is unclear whether this association is present in the general population. ...
    • Clinical outcomes after surgery for cervical radiculopathy performed in public and private hospitals : a nationwide relative effectiveness study 

      Danielsen, Elisabet; Gulati, Sasha; Salvesen, Øyvind Olav; Ingebrigtsen, Tor; Nygaard, Øystein Petter; Solberg, Tore (Peer reviewed; Journal article, 2023)
      Aims The number of patients undergoing surgery for degenerative cervical radiculopathy has increased. In many countries, public hospitals have limited capacity. This has resulted in long waiting times for elective ...
    • Diagnostic accuracy of anti-3-[18F]-FACBC PET/MRI in gliomas 

      Karlberg, Anna Maria; Pedersen, Lars Kjelsberg; Vindstad, Benedikte Emilie; Skjulsvik, Anne Jarstein; Johansen, Håkon; Solheim, Ole Skeidsvoll; Skogen, Karoline; Kvistad, Kjell Arne; Bogsrud, Trond; Myrmel, Kristin Smistad; Giskeødegård, Guro F.; Ingebrigtsen, Tor; Berntsen, Erik Magnus; Eikenes, Live (Peer reviewed; Journal article, 2023)
      Purpose - The primary aim was to evaluate whether anti-3-[18F]FACBC PET combined with conventional MRI correlated better with histomolecular diagnosis (reference standard) than MRI alone in glioma diagnostics. The ability ...
    • Effect of caudal epidural steroid or saline injection in chronic lumbar radiculopathy: multicentre, blinded, randomised controlled trial 

      Iversen, Trond; Solberg, Tore; Romner, Bertil; Wilsgaard, Tom; Twisk, Jos WR; Anke, Audny; Nygaard, Øystein Petter; Hasvold, Toralf; Ingebrigtsen, Tor (Journal article, 2011)
      Abstract Objective To assess the efficacy of caudal epidural steroid or saline injection in chronic lumbar radiculopathy in the short (6 weeks), intermediate (12 weeks), and long term (52 weeks). Design Multicentre, ...
    • Glioblastom hos voksne 

      Schipmann, Stephanie; Sivakanesan, Sarankan; Rath, Daniel Stavne; Brandal, Petter; Vik-Mo, Einar Osland; Bjørås, Magnar; Solheim, Ole Skeidsvoll; Ingebrigtsen, Tor; Sund, Fredrik; Bjerkvig, Rolf; Miletic, Hrvoje; Johannessen, Tor-Christian Aase; Sundstrøm, Terje (Peer reviewed; Journal article, 2023)
      lioblastom er den vanligste formen for primær hjernekreft hos voksne, og sykdommen har en alvorlig prognose. Selv om det er gjort store fremskritt i molekylær karakteristikk, har det ikke vært større gjennombrudd i ...
    • Histomolecular Validation of [<sup>18</sup>F]-FACBC in Gliomas Using Image-Localized Biopsies 

      Vindstad, Benedikte Emilie; Skjulsvik, Anne Jarstein; Pedersen, Lars Kjelsberg; Berntsen, Erik Magnus; Solheim, Ole Skeidsvoll; Ingebrigtsen, Tor; Reinertsen, Ingerid; Johansen, Håkon; Eikenes, Live; Karlberg, Anna Maria (Journal article; Peer reviewed, 2024)
      Background: Gliomas have a heterogeneous nature, and identifying the most aggressive parts of the tumor and defining tumor borders are important for histomolecular diagnosis, surgical resection, and radiation therapy ...
    • Impact of the number of previous lumbar operations on patient-reported outcomes after surgery for lumbar spinal stenosis or lumbar disc herniation 

      Riksaasen, Anniken S.; Kaur, Simran; Solberg, Tore; Austevoll, Ivar Magne; Brox, Jens Ivar; Dolatowski, Filip Celestyn; Hellum, Christian; Kolstad, Frode; Lønne, Greger; Nygaard, Øystein Petter; Ingebrigtsen, Tor (Peer reviewed; Journal article, 2023)
      Aims Repeated lumbar spine surgery has been associated with inferior clinical outcomes. This study aimed to examine and quantify the impact of this association in a national clinical register cohort. Methods This ...
    • A nationwide study of patients operated for cervical degenerative disorders in public and private hospitals 

      Danielsen, Elisabeth; Mjåset, Christer; Ingebrigtsen, Tor; Gulati, Sasha; Grotle, Margreth; Rudolfsen, Jan Håkon; Nygaard, Øystein Petter; Solberg, Tore (Peer reviewed; Journal article, 2022)
      During the last decades, there has been an increase in the rate of surgery for degenerative disorders of the cervical spine and in the use of supplementary private health insurance. Still, there is limited knowledge about ...
    • Non-respondents do not bias outcome assessment after cervical spine surgery: a multicenter observational study from the Norwegian registry for spine surgery (NORspine) 

      Ingebrigtsen, Tor; Aune, Grethe; Karlsen, Martine Eriksen; Gulati, Sasha; Kolstad, Frode; Nygaard, Øystein Petter; Thyrhaug, Anette Moltu; Solberg, Tore (Peer reviewed; Journal article, 2022)
      Background The Norwegian registry for spine surgery (NORspine) is a national clinical quality registry which has recorded more than 10,000 operations for degenerative conditions of the cervical spine since 2012. Registries ...
    • The Norwegian registry for spine surgery (NORspine): cohort profile 

      Mikkelsen, Eirik; Ingebrigtsen, Tor; Thyrhaug, Anette Moltu; Olsen, Lena Ringstad; Nygaard, Øystein Petter; Austevoll, Ivar Magne; Brox, Jens Ivar; Hellum, Christian; Kolstad, Frode; Lønne, Greger; Solberg, Tore (Peer reviewed; Journal article, 2023)
      Purpose To review and describe the development, methods and cohort of the lumbosacral part of the Norwegian registry for spine surgery (NORspine). Methods NORspine was established in 2007. It is government funded, ...
    • Obesity does not protect from subarachnoid haemorrhage: Pooled analysis of 3 large prospective Nordic cohorts 

      Rautalin, Ilari; Kaprio, Jaakko; Ingebrigtsen, Tor; Jousilahti, Pekka; Løchen, Maja-Lisa; Romundstad, Pål Richard; Salomaa, Veikko; Vik, Anne; Wilsgaard, Tom; Mathiesen, Ellisiv B.; Sandvei, Marie Søfteland; Korja, Miikka (Journal article; Peer reviewed, 2021)
      Background and Purpose: Several population-based cohort studies have related higher body mass index (BMI) to a decreased risk of subarachnoid hemorrhage (SAH). The main objective of our study was to investigate whether ...
    • A prognostic model for failure and worsening after lumbar microdiscectomy: a multicenter study from the Norwegian Registry for Spine Surgery 

      Werner, David Andreas Thomas; Grotle, Margreth; Småstuen, Milada Cvancarova; Gulati, Sasha; Nygaard, Øystein Petter; Salvesen, Øyvind; Ingebrigtsen, Tor; Solberg, Tore (Peer reviewed; Journal article, 2021)
      Methods This multicenter cohort study included 11,081 patients operated with lumbar microdiscectomy, registered at the Norwegian Registry for Spine Surgery. Follow-up was 1 year. Uni- and multivariate logistic regression ...
    • Prospects of returning to work after lumbar spine surgery for patients considering disability pension: A nationwide study based on data from the Norwegian Registry for Spine Surgery 

      Hammer, Lovise; Ingebrigtsen, Tor; Gulati, Sasha; Hara, Sozaburo; Nygaard, Øystein Petter; Hara, Karen Walseth; Solberg, Tore (Peer reviewed; Journal article, 2023)
      Objectives To assess the odds for not returning to work (non-RTW) 1 year after treatment among patients who had applied for or were planning to apply for disability pension (DP-applicant) prior to an operation for degenerative ...
    • Stable glioma incidence and increased patient survival over the past two decades in Norway: a nationwide registry-based cohort study 

      Skaga, Erlend; Trewin-Nybråten, Cassia Bree; Niehusmann, Pitt; Johannessen, Tom Børge; Marienhagen, Kirsten; Oltedal, Leif; Schipmann, Stephanie; Skjulsvik, Anne Jarstein; Solheim, Ole Skeidsvoll; Solheim, Tora S; Sundstrøm, Terje; Vik-Mo, Einar Osland; Brandal, Petter; Ingebrigtsen, Tor (Journal article; Peer reviewed, 2024)
      Background: Surveillance of incidence and survival of central nervous system tumors is essential to monitor disease burden and epidemiological changes, and to allocate health care resources. Here, we describe glioma incidence ...