Baseline characteristics* of participants of the Swedish Mammography Cohort by categories of exercise and walking/bicycling at study entry
| Exercise at study entry (h/week) | Walking/bicycling at study entry (min/days) | |||||||
|---|---|---|---|---|---|---|---|---|
| Characteristics | <1 (n=6624)† | 1 (n=8120) | 2–3 (n=11 523) | ≥4 (n=7773) | Almost never (n=3776)† | <20 (n=6650) | 20–39 (n=12 141) | ≥40 (n=12 675) |
| Age, mean (years) | 61.1 | 60.3 | 61.2 | 62.6 | 64.0 | 60.5 | 60.8 | 62.0 |
| Height (cm) | 164.7 | 164.8 | 164.9 | 164.6 | 164.2 | 164.8 | 165.0 | 164.6 |
| Body mass index, mean (kg/m2) | 25.7 | 25.3 | 24.9 | 24.4 | 26.1 | 25.5 | 24.9 | 24.6 |
| Postsecondary education (%) | 18.1 | 20.2 | 20.3 | 17.9 | 14.9 | 19.0 | 21.2 | 18.1 |
| Current smoking (%) | 29.7 | 23.2 | 20.2 | 22.2 | 32.1 | 25.1 | 21.4 | 22.0 |
| History of hypertension (%) | 23.4 | 21.9 | 20.4 | 19.1 | 25.5 | 21.8 | 20.5 | 19.4 |
| History of type 2 diabetes (%) | 4.9 | 3.9 | 3.7 | 4.2 | 6.5 | 4.3 | 3.6 | 3.9 |
| History of coronary heart disease or heart failure (%) | 5.6 | 4.7 | 3.9 | 3.7 | 6.9 | 5.0 | 4.0 | 3.7 |
| Family history of myocardial infarction (%) | 17.4 | 17.2 | 16.5 | 18.0 | 19.3 | 17.8 | 17.3 | 16.5 |
| Alcohol intake, mean (g/day) | 5.4 | 5.3 | 5.3 | 5.5 | 5.4 | 5.3 | 5.5 | 5.3 |
*Age standardised to the age distribution of the study population at study entry.
†The number of women does not sum up to the total number because of missing data on exercise (n=2473) and walking/bicycling (n=1271). g/day; gram/day.