Kristoffersen, Målfrid Holen, Eva Dybvik, Ole Martin Steihaug, Torbjørn Berge Kristensen, Lars Birger Engesæter, Anette Hylen Ranhoff, and Jan-Erik Gjertsen. “Cognitive Impairment Influences the Risk of Reoperation After Hip Frac- Ture Surgery: Results of 87,573 Operations Reported to the Norwegian Hip Fracture Register”. Acta Orthopaedica 91, no. 2 (January 13, 2020): 146–151. Accessed July 15, 2026. https://actaorthop.org/actao/article/view/471.