Table 7 Adjusted* odds ratio and 95% confidence intervals of long term sick leave (>21 days a year) by frequency of vigorous physical activity.

Frequency of vigorous physical activity		SMASH
0 days a week		Reference
1 day a week		0.67 (0.57 to 0.80)
2 days a week		0.62 (0.52 to 0.75)
⩾3 days a week		0.76 (0.60 to 0.96)

*Analyses were adjusted for age, sex, education level, body mass index, smoking status, physical (in)activity during work.

SMASH, Study on Musculoskeletal disorders, Absenteeism, Stress and Health.