TABLE 1.
Basic data statistics of the participants [M ± SD / n (%), N = 40]
| Variables | Group I | Group II | |
| Demographic information | |||
| Gender | Women | 26 (65%) | 14 (35%) |
| Age (year) | 26.35 ± 4.45 | 31.50 ± 4.11 | |
| Body height (m) | 1.55 ± 0.05 | 1.54 ± 0.05 | |
| Body weight (kg) | 57.19 ± 6.92 | 58.49 ± 7.43 | |
| BMI | 23.70 ± 2.50 | 24.39 ± 2.41 | |
| Marital status | Married | 2 (5%) | 3 (7.5%) |
| Unmarried | 15 (37.5%) | 3 (7.5%) | |
| Divorced | 9 (22.5%) | 8 (20%) | |
| Educational degree | Primary school | 2 (5%) | 3 (7.5%) |
| Middle school | 19 (47.5%) | 6 (15%) | |
| High school | 4 (10%) | 5 (12.5%) | |
| College or above | 1 (2.5%) | 0 | |
| Occupation | Unemployed | 11 (27.5%) | 9 (22.5%) |
| Self-employed | 2 (5%) | 0 | |
| Civil servant | 0 | 1 (2.5%) | |
| Office clerks | 8 (20%) | 2 (5%) | |
| Others | 5 (12.5%) | 2 (5%) | |
| Monthly income | >1,000 yuan/person | 14 (35%) | 5 (12.5%) |
| Drug user relevant information | |||
| Methamphetamine use experience (year) | 4.96 ± 1.54 | 12.86 ± 4.33 | |
| Methamphetamine use frequency (time/week) | 3.00 ± 0.89 | 3.64 ± 0.84 | |
| Cigarette smoking | Yes | 17 (42.5%) | 13 (32.5%) |
| Experience (year) | 6.19 ± 1.98 | 11.36 ± 2.98 | |
| Alcohol drinking | Yes | 13 (32.5%) | 10 (25%) |
| Experience (year) | 6.27 ± 1.71 | 9.86 ± 2.28 | |
| Times of compulsory abstinence (times) | 1.38 ± 0.64 | 1.86 ± 0.86 | |
Group I, methamphetamine users with an experience <10 years; Group II, methamphetamine users with an experience ≥10 years; BMI, body mass index [BMI is calculated by dividing the body weight in kilograms by the height in meters squared (kg/m2)].