Fig. 2
From: Physical working conditions over time: a repeated cross-sectional study in German employees
Trends in physical working conditions in occupational groups. Notes. WC-HS = White-Collar High-Skilled Occupational Group; WC-LS = White-Collar Low-Skilled Occupational Group; BC-HS = Blue-Collar High-Skilled Occupational Group; BC-LS = Blue-Collar Low-Skilled Occupational Group