Table 1. Comparison of non-PIUs and PIUs over characteristic of the participants.
| Variables | N of non-addicted (%) | N of addicted (%) | Total (%) |
|
| (n = 10,931) | (n = 1,515) | (N = 12,446) | ||
| Gender | 62.357*** | |||
| Males | 5,181(47.4) | 882(58.2) | 6,063(48.7) | |
| Females | 5,750(52.6) | 633(41.8) | 6,383(51.3) | |
| District | 46.164*** | |||
| Qingyuan | 2,448(22.4) | 389(25.7) | 2,837(22.8) | |
| Zhanjiang | 2,577(23.6) | 261(17.2) | 2,838(22.8) | |
| Huizhou | 2,896(26.5) | 482(31.8) | 3,378(27.1) | |
| Shenzhen | 3,010(27.5) | 383(25.3) | 3,393(27.3) | |
| Type of school | 11.783* | |||
| Key senior high school | 1,761(16.1) | 259(17.1) | 2,020(16.2) | |
| Regular senior high school | 2,082(19.0) | 303(20.0) | 2,385(19.2) | |
| Vocational high school | 1,785(16.3) | 229(15.1) | 2,014(16.2) | |
| Key junior high school | 2,887(26.4) | 351(23.2) | 3,238(26.0) | |
| Regular junior high school | 2,416(22.1) | 373(24.6) | 2,789(22.4) | |
| Smokinga | 161.176*** | |||
| No | 10,312(94.3) | 1,315(86.8) | 11,627(93.4) | |
| Yes | 478(4.4) | 182(12.0) | 663(5.3) | |
| Drinking/M | 58.702*** | |||
| <4 Times | 10,737(98.2) | 1,442(95.2) | 12,179(97.9) | |
| ≥4 Times | 194(1.8) | 73(4.8) | 267(2.1) | |
| Social friendsb | 152.523*** | |||
| No | 5,891(53.9) | 561(37.0) | 6,452(51.8) | |
| Yes | 5,017(45.9) | 952(62.8) | 5,969(48.0) |
*p<0.05,
**p<0.01,
***p<0.001.
Missing date exist in some categories.
a
Smoking≥20 times in a half of a year.
b
Adolescent who have dropped out of school.