Table 1

Sample characteristics and physical activity levels at baseline, 12, 16 and 20-year follow-ups, n=3413

Baseline12 years16 years20 years
Age (years, mean±SD)48.6±5.462.2±5.466.2±5.468.5±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.