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Pain trajectories in the Danish PHysical ACTivity cohort with Objective measurements (DPHACTO) study population stratified on tertiles (ie, low, middle and high) of per cent sitting time at work. The y-axis represents the mean neck–shoulder pain intensity on a 0–10 scale (A), and the estimated mean neck–shoulder pain intensity (scale 0–10) according to the crude model (B). The x-axis represents the 14 time points over the 12 months follow-up period.
