Table 1

Basic characteristics of the study subjects according to the categorized frequency of alcohol intake
Frequency of alcohol intake (day/week) P for trenda
0 ≤3 4-6 7
(n = 149) (n = 294) (n = 169) (n = 287)
Age (year)b 45.0 (38.0–55.0) 41.5 (36.0–52.3) 48.0 (38.0–55.0) 51.0 (42.0–57.0) < 0.001
Education (%)
  ≥12 years 35.6 59.5 53.3 38.7 0.135
Occupation (%)
  Non office work 11.4 24.1 23.1 20.2 0.234
Smoking status (%)
  Never smoker 39.6 39.1 40.2 27.2 0.003
  Ex smoker 9.4 15.6 11.2 12.2 0.976
  Current smoker 51.0 45.2 48.5 60.6 0.004
BMI (kg/m2)b 23.8 (21.6–26.1) 23.8 (21.7–26.0) 23.6 (22.1–25.5) 22.8 (20.9–25.0) < 0.001
Physical activity (%)
  ≥10min/day 71.1 81.6 78.7 80.1 0.166
Depressive symptoms (%)
  SDS ≥45 36.9 28.2 29.6 32.4 0.759
Sleep duration (%)
  <7 hour 53.7 54.4 53.3 37.3 < 0.001
  7-8 hour 32.2 33.3 33.7 44.3 0.005
  ≥8 hour 14.1 12.2 13.0 18.5 0.089
Metabolic syndrome (%)
  Yes 30.9 32.3 30.2 27.2 0.247
Calorie intake (%)
  1st (≤1519.0kcal) 31.5 28.9 23.7 18.5 0.001
  2nd (1519.0-1877.0kcal) 26.8 28.2 21.3 23.0 0.146
  3rd (1877.0-2296.9kcal) 22.8 23.1 21.9 29.6 0.078
  4th (>2296.9kcal) 18.8 19.7 33.1 28.9 0.001
Vitamin C intake (%)
  1st (≤56.0mg/d) 24.2 22.1 24.3 28.6 0.139
  2nd (56.0-82.0mg/d) 24.2 23.5 24.3 27.5 0.313
  3rd (82.0-121.5mg/d) 31.5 25.2 26.0 20.9 0.026
  4th (>121.5mg/d) 20.1 29.3 25.4 23.0 0.796
Zinc intake (%)
  1st (≤5.8mg/d) 24.8 22.8 23.1 28.2 0.259
  2nd (5.8-7.3mg/d) 22.8 28.2 23.7 23.3 0.572
  3rd (7.3-9.2mg/d) 24.2 24.8 24.9 26.1 0.639
  4th (>9.2mg/d) 28.2 24.1 28.4 22.3 0.302

a Analysis of variance for continuous variables or logistic regression for categorical variable.

b Medians and interquartile range in parentheses.

Ouchi et al.

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

Open Data