Table 2

Basic characteristics of the study subjects according to the categorized amount of alcohol intake
Amount of alcohol intake (g/day)a P for trendb
Non-drinking ≤11.5 11.5-35.8 >35.8
(n = 149) (n = 250) (n = 249) (n = 251)
Age (years)c 45.0 (38.0–55.0) 42.0 (36.0–53.0) 47.0 (38.0–56.0) 50.0 (42.0–57.0) < 0.001
Education (%)
  ≥12 years 35.6 56.8 49.0 44.6 0.717
Occupation (%)
  Non office work 11.4 25.6 21.3 20.3 0.270
Smoking status (%)
  Never smoker 39.6 41.6 36.1 26.7 0.001
  Ex smoker 9.4 16.0 12.4 11.6 0.899
  Current smoker 51.0 42.4 51.4 61.8 0.001
BMI (kg/m2)c 23.8 (21.6–26.1) 23.7 (21.9–25.9) 23.3 (21.5–25.5) 23.1 (21.1–25.3) 0.009
Physical activity (%)
  ≥10 min/day 71.1 83.6 76.7 80.9 0.209
Depressive symptoms (%)
  SDS ≥45 36.9 27.2 29.7 33.5 0.937
Sleep duration (%)
  <7 hour 53.7 52.8 47.8 42.2 0.009
  7-8 hour 32.2 33.2 39.4 40.2 0.042
  ≥8 hour 14.1 14.0 12.9 17.5 0.343
Metabolic syndrome (%)
  Yes 30.9 28.0 32.9 28.7 0.956
Calorie intake (%)
  1st (≤1519.0kcal) 31.5 33.6 26.1 11.6 < 0.001
  2nd (1519.0-1877.0kcal) 26.8 28.8 23.3 21.9 0.098
  3rd (1877.0-2296.9kcal) 22.8 20.8 26.9 28.3 0.068
  4th (>2296.9kcal) 18.8 16.8 23.7 38.2 < 0.001
Vitamin C intake (%)
  1st (≤56.0mg/d) 24.2 26.8 22.5 25.9 1.000
  2nd (56.0-82.0mg/d) 24.2 24.8 24.9 25.9 0.697
  3rd (82.0-121.5mg/d) 31.5 22.4 25.3 23.5 0.224
  4th (>121.5mg/d) 20.1 26.0 27.3 24.7 0.408
Zinc intake (%)
  1st (≤5.8mg/d) 24.8 25.2 25.3 24.3 0.884
  2nd (5.8-7.3mg/d) 22.8 28.0 23.7 24.3 0.826
  3rd (7.3-9.2mg/d) 24.2 24.8 26.5 24.7 0.846
  4th (>9.2mg/d) 28.2 22.0 24.5 26.7 0.865

a Drinkers were categorized into tertiles.

b Analysis of variance for continuous variables or logistic regression for categorical variables.

c Medians and interquartile range are presented in parentheses.

Ouchi et al.

Ouchi et al. BMC Public Health 2012 12:987   doi:10.1186/1471-2458-12-987

Open Data