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Table 1 Basic characteristics of participants

From: Number of children and the prevalence of later-life major depression and insomnia in women and men: findings from a cross-sectional study of 0.5 million Chinese adults

  Number of children
No Child Children = 1 Children = 2 Children≥3
N, % 10,330, 2.01 183,628, 35.80 166,394, 32.44 152,539, 29.74
Socio-demographic characteristics
 Mean age, years (SD) 49.55 (12.04) 45.26 (7.37) 50.64 (9.34) 60.18 (9.47)
 Female, % 40.21 57.60 59.73 61.18
 Region is urban, % 48.06 64.91 31.88 32.11
Socio-economic characteristics
 Highest education, %
  Primary school / below 49.05 28.36 54.82 73.47
  High school / above 50.95 71.64 45.18 26.53
 Household income, %
   < 10,000yuan 69.23 44.5 56.53 72.71
   ≥ 10,000yuan 30.77 55.5 43.47 27.29
 Occupation, %
  Agriculture and related 39.96 24.17 52.46 51.26
  Factory workers 16.57 28.57 9.14 1.97
  Clerk 18.23 26.08 10.71 4.49
  Unemployed/Others 25.24 21.17 27.68 42.28
 Marital status
  Married 51.08 94.30 94.18 84.87
  Widowed/Divorced/Single 48.92 5.70 5.82 15.13
Lifestyle factors
 Self-rated health, %
  Poor 12.95 9.07 9.55 12.60
  Fair 48.12 40.53 43.91 47.62
  Good 22.53 28.59 30.13 25.76
  Excellent 16.40 21.81 16.41 14.02
 BMI (kg/m2), %
   < 20 20.99 10.29 12.58 16.13
  20–25 54.61 56.17 55.52 53.27
   > 25 24.40 33.55 31.90 30.60
 Smoking, %
  Never 48.14 61.11 63.17 62.49
  Ever smoke 51.86 38.89 36.83 37.51
 Alcohol, %
  Never 38.30 37.27 48.58 53.74
  Ever use 61.70 62.73 51.42 46.26