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Table 1 Main characteristics of study participants

From: Patterns and socio-demographic correlates of domain-specific physical activities and their associations with adiposity in the China Kadoorie Biobank study

Characteristics Men (n =188 647) Women (n = 277 958) Total (n =188 647)
Age (years), %    
  30 – 39 15.2 16.9 16.2
  40 – 49 30.0 32.2 31.3
  50 – 59 30.6 30.8 30.7
  60 – 69 17.8 15.2 16.2
  70 – 79 6.5 4.8 5.5
  Mean (SD) 51.5 (10.7) 50.3 (10.3) 50.8 (10.5)
Residence, %    
  Urban 42.6 43.3 43.0
  Rural 57.4 56.7 57.0
Occupational physical activity (MET-hr/day), %
  0 18.1 34.7 28.0
  0.1– 10 18.0 20.7 19.6
  10.1 – 20 25.5 23.1 24.1
  > 20 38.4 21.5 28.3
  Mean (SD) 17.3 (14.9) 10.9 (12.5) 13.5 (13.9)
Commuting-related physical activity (MET-hr/day), %
  0 31.4 47.3 40.9
  0.1 – 1.5 23.5 17.9 20.1
  1.6 – 3.0 26.0 20.2 22.6
  > 3.0 19.1 14.6 16.4
  Mean (SD) 1.9 (2.4) 1.4 (2.2) 1.6 (2.3)
Household physical activity (MET-hr/day)
  0 21.0 0.7 8.9
  0.1 – 4.0 54.5 15.8 31.4
  4.1 – 8.0 17.4 31.8 26.0
  > 8.0 7.0 51.8 33.7
  Mean (SD) 2.9 (2.8) 7.7 (3.9) 5.7 (4.2)
Active-recreational physical activity (MET-hr/day), %
  0 79.0 80.4 79.8
  0.1 – 2.0 6.9 5.8 6.2
  2.0 – 4.0 6.8 6.5 6.7
  > 4.0 7.2 7.3 7.3
  Mean (SD) 0.8 (2.2) 0.8 (2.2) 0.8 (2.2)
Total physical activity (MET-hr/day) 22.8 (15.1) 20.9 (12.8) 21.7 (13.8)
Sedentary leisure time (hr/day) 3.1 (1.5) 2.9 (1.5) 3.0 (1.5)
Body mass index (kg/m2)1 23.4 (3.2) 23.8 (3.4) 23.6 (3.3)
Waist circumference (cm) 81.9 (9.7) 78.8 (9.4) 80.1 (9.6)
Percentage body fat (%)2 22.0 (6.2) 32.0 (7.1) 28.0 (8.3)
  1. SD: standard deviation.
  2. 12 participants with missing values.
  3. 2214 participants with missing values.