P05-06 Composition of physical behaviors at work and risk of sick leave due to musculoskeletal pain

Abstract Background Sick leave due to musculoskeletal pain is common in the workforce. Time use physical behaviors at work such as sitting, standing, low- (LIPA) and moderate-to-vigorous activity (MVPA) may impact on sick pain. However, studies addressing this relationship using technical measures of are scarce. The aim was investigate association between time-use compositions behavior trajectories over one year. Methods We analyzed data 981 workers a Danish cohort (DPHACTO 2012-2014). assessed baseline thigh-worn accelerometers, classified LIPA, MVPA. Over 1 year follow-up, reported days text messages 4-week intervals (14 waves). used Latent class growth analysis distinguish sub-groups with different leave. associations multinomial regression adjustment for age, gender, BMI, smoking, accelerometry-measured during leisure. Compositional account co-dependency behaviors. Results identified four distinct follows: no (prevalence 76%), few days-increasing trajectory (19%), some days-decreasing (3%), (2%). Spending more time sitting relative other negatively associated (p > 0.001), while LIPA positively = 0.001). Reallocating 60 min/day from predicted 22% increased likelihood sick-leave. In contrast, reallocating 30 57% decreased trajectory. Conclusion found that had lower odds increasing pain, higher odds. This have implications prevention pain-related workers.