Table 1 Baseline characteristics of 30,112 women from the Swedish Mammography Cohort, 1997, by leisure-time activity
From: Physical activity and risk of rheumatoid arthritis in women: a population-based prospective study
Leisure-time activity | ||||
|---|---|---|---|---|
Low | Intermediate | High | ||
Walking | Walking | Walking | Walking | |
<20 minutes/day | <20 minutes/day | ≥20 minutes/day | ≥20 minutes/day a | |
Exercise | Exercise | Exercise | Exercise | |
<1 hour/week | ≥1 hour/week | <1 hour/week | ≥1 hour/week a | |
Cases | 32 | 37 | 14 | 118 |
Cohort | 3,400 | 5,369 | 2,370 | 18,973 |
Age (years) | 61.6 (9.4) | 61.3 (9.0) | 59.8 (8.7) | 61.3 (8.7) |
Years of education (>12 years, %) | 15.8 | 19.9 | 23.4 | 19.8 |
Body mass index (kg/m2) | 26.2 (4.67) | 25.5 (4.11) | 24.9 (3.89) | 24.7 (3.60) |
Current smokers (%) | 30.7 | 23.5 | 27.6 | 20.0 |
Alcohol drinkers (%) | 77.9 | 83.5 | 84.0 | 85.0 |