Table 1.
Sample characteristics and physical activity levels at baseline, 12, 16 and 20-year follow-ups, n=3413
| Baseline | 12 years | 16 years | 20 years | |
| Age (years, mean±SD) | 48.6±5.4 | 62.2±5.4 | 66.2±5.4 | 68.5±5.4 |
| Overweight/obese (%, n)* | 52.2 (1783) | |||
| Current smoker (%, n)* | 30.6 (1043) | |||
| Manual occupation (%, n)* | 50.2 (1713) | |||
| Physically active† (%, n) | 66.1 (2257) | 71.0 (2422) | 63.7 (2173) | 66.9 (2284) |
| High sport participation‡ (%, n) | 47.7 (1627) | 45.3 (1532) | 44.6 (1493) | 49.2 (1663) |
| High recreational activity§ (%, n) | 56.0 (1912) | 58.4 (1994) | 41.2 (1407) | 40.2 (1372) |
| High walking¶ (%, n) | 26.9 (918) | 51.6 (1754) | 50.9 (1735) | 61.5 (2097) |
Data presented are for participants with a valid physical activity score at all four time points (n=3413). Data on walking were missing for an additional 15 participants at 12-year follow-up, 3 participants at 16-year follow-up and 1 participant at 20-year follow-up. Data on sport participation were missing for 33 participants at 12-year follow-up, 68 participants at 16-year follow-up and 34 participants at 20-year follow-up.
*Data on BMI, smoking status and occupational class were used at baseline only.
†Physically active was classified as reporting at least light activity.
‡High sport was classified as reporting at least occasional participation (less than once a month).
§High recreational activity was classified as >2 hours/day on recreational activities.
¶High walking was classified as >20 min/day.