Table 1.
Baseline characteristics of study population
| Variables | NOUs (n = 4345) | FOUs (n = 176) | COUs (n = 811) | P |
|---|---|---|---|---|
| Sex | ||||
| Male | 1568 (36.1) | 156 (88.6) | 642 (79.2) | < 0.001 |
| Female | 2777 (63.9) | 20 (11.4) | 169 (20.8) | |
| Age categories (year) | ||||
| ≤ 30 | 1013 (23.3) | 26 (14.8) | 44 (5.4) | |
| 31-40 | 809 (18.6) | 57 (32.4) | 112 (13.8) | < 0.001 |
| 41-50 | 853 (19.6) | 37 (21.0) | 185 (22.8) | |
| 51-60 | 863 (19.9) | 38 (21.6) | 230 (28.4) | |
| > 60 | 807 (18.6) | 18 (10.2) | 240 (29.6) | |
| Mean age | 45.08 ± 15.6 | 43.8 ± 12.6 | 52.5 ± 13.1 | < 0.001 |
| BMI | ||||
| < 25 | 1776 (41.2) | 106 (60.2) | 434 (53.8) | |
| 25-29.99 | 1660 (38.5) | 50 (28.4) | 273 (33.8) | < 0.001 |
| 30-34.99 | 683 (15.8) | 16 (9.1) | 79 (9.8) | |
| ≥ 35 | 195 (4.5) | 4 (2.3) | 21 (2.6) | |
| Mean BMI | 26.25 ± 5.06 | 24.03 ± 4.7 | 24.8 ± 5.04 | < 0.001 |
NOUs: Non-opium users; FOUs: Former opium users; COUs: Current opium users; BMI: Body mass index