Lifetime Occupational Physical Activity and Musculoskeletal Aging in Middle-Aged Men and Women in Denmark: Retrospective Cohort Study Protocol and Methods

Anne Møller   ^{1, 2, 3} , MD ;   Ole Steen Mortensen   ^{3, 4} , PhD ;   Susanne Reventlow   ² , DMSc ;   Peder Georg Skov   ¹ , MD ;   Johan Hviid Andersen   ⁵ , PhD ;   Tine Steen Rubak   ⁴ , PhD ;   Åse Marie Hansen   ^{3, 6} , PhD ;   Lars L Andersen   ³ , PhD ;   Rikke Lund   ⁶ , PhD ;   Merete Osler   ^{6, 7, 8} , DMSc ;   Ulla Christensen   ⁶ , PhD ;   Kirsten Avlund   ^{6, 7, 9} , DMSc

¹ Department of Occupational Medicine, Køge Hospital, Køge, Denmark

² The Research Unit for General Practice and Section of General Practice, Department of Public Health, University of Copenhagen, Copenhagen, Denmark

³ National Research Centre for the Working Environment, Copenhagen, Denmark

⁴ Department of Occupational and Environmental Medicine, Bispebjerg Hospital, Copenhagen, Denmark

⁵ Danish Ramazzini Center, Department of Occupational Medicine, Region Hospital, Herning, Denmark

⁶ Section of Social Medicine, Department of Public Health, University of Copenhagen, Copenhagen, Denmark

⁷ Danish Aging Research Center, Universities of Southern Denmark, Aarhus and Copenhagen, Copenhagen, Denmark

⁸ Research Centre for Prevention and Health, Glostrup University Hospital, Glostrup, Denmark

⁹ Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark