Table 2 Unadjusted odds ratio for factors associated with initiation of injection
From: Risk factors associated with injection initiation among drug users in Northern Thailand
| Â | Unadjusted odds ratio (95% CI) |
|---|---|
Age | Â |
Under 20 years old | Reference |
20~29 years old | 8.3 (6.0~11.4) |
30~39 years old | 6.6 (4.8~9.2) |
40 years old or older | 3.2 (2.3~4.5) |
Male | 2.2 (1.6~3.1) |
Thai ethnicity | 1.4 (1.2~1.7) |
Single | 1.6 (1.3~1.9) |
Rural residence | 0.39 (0.32~0.47) |
Education | Â |
No schooling | Reference |
≤ 6 years | 2.5 (1.9~3.1) |
7~11 years | 1.4 (1.1~1.8) |
12 or more years | 2.5 (1.9~3.2) |
Employed | 0.96 (0.77~1.2) |
Ever smoking | 7.3 (4.2~12.7) |
Ever drinking | 2.1 (1.6~2.6) |
Ever in jail | 7.2 (5.9~8.7) |
No. of lifetime sex partners | Â |
One or no partner | Reference |
2~5 partners | 2.4 (1.9~3.1) |
6~10 partners | 3.9 (2.9~5.2) |
11 or more partners | 6.1 (4.7~7.9) |
Ever selling sex | 2.9 (1.5~5.6) |
Ever sex abused | 2.8 (1.4~6.0) |
Type of initiation drug | Â |
Opium | Reference |
Marijuana | 3.4 (2.7~4.2) |
Heroin | 3.4 (2.6~4.5) |
Amphetamine | 0.13 (0.085~0.20) |
Others | 3.9 (2.6~5.7) |
Age of drug initiation | Â |
Under 16 years old | Reference |
16~18 years old | 1.5 (1.2~1.8) |
19~23 years old | 1.0 (0.80~1.3) |
24 years old or older | 0.39 (0.30~0.50) |