Skip to main content

Table 1 Demographic, cigarette smoking and alcohol drinking characteristic of participants

From: Sleeping problems in Chinese illicit drug dependent subjects

  2178 Drug users 2236 Nondrug users
Age, M ± SD 30.04 ± 7.134 30.58 ± 11.145
Educational levels, M ± SD* 10.63 ± 2.975 12.10 ± 3.225
Gender (n, %) Male 1875, 86.1% 1910, 85.4%
Female 303, 13.9% 326, 14.6%
Ethnicity (n, %) Han Chinese 2149, 98.8% 2156, 96.5%
Minorities 26, 1.2% 79, 3.5%
Employment status (n, %) Employed 1214, 56.0% 1360,61.1%
Unemployed 953, 44.0% 866, 38.9%
Marital status (n, %) Married 942, 43.3% 1136, 51.5%
Unmarried 1227, 56.6% 1071, 48.5%
Cigarette smoking (n, %) Smokers 2104, 96.7% 895, 40.3%
Nonsmokers 71, 3.3% 1328, 59.7%
Alcohol drinking (n, %) Drinkers 758, 34.9% 686, 30.9%
Nondrinkers 1413, 65.1% 1535, 69.1%
  1. M: mean; SD: standard deviation; n: number; %: the percentage of subjects.
  2. Cigarette smoker was defined as smoked more than 100 cigarettes in the life time.
  3. Alcohol drinking was defined as drunk no less than 30 g alcohol (equal to 900 ml beer) per week.
  4. * Significantly different from control group, p < 0.01.