| Variables | Substance use | COR, 95% CI | AOR, 95% CI | value | Yes | No |
| Sex | | | | | | Male | 524 | 253 | 2.38 (1.78, 3.19) | 3.11 (2.20, 4.39) | <0.001 | Female | 114 | 131 | 1 | 1 | | Religion | | | | | | Orthodox | 364 | 154 | 1 | | | Muslim | 154 | 91 | 0.72 (0.52, 0.99) | 0.62 (0.44, 0.87) | 0.06 | Protestant | 86 | 128 | 0.28 (0.20, 0.40) | 0.25 (0.17, 0.36) | <0.001 | Others* | 34 | 11 | 1.31 (0.65, 2.65) | 0.93 (0.44, 1.99) | 0.860 | Marital status | | | | | | Never married | 567 | 361 | 1 | | | Ever married | 71 | 23 | 1.97 (1.21, 3.20) | 1.92 (1.12, 3.30) | 0.017 | Year of study | | | | | | 1st year | 213 | 139 | 1 | | | 2nd year | 157 | 108 | 0.95 (0.69, 1.31) | 0.83 (0.58, 1.19) | 0.307 | 3rd year | 175 | 74 | 1.54 (1.09, 2.18) | 1.48 (1.01, 2.16) | 0.045 | 4th year and above | 93 | 63 | 0.96 (0.66, 1.42) | 1.22 (0.79, 1.88) | 0.365 | High school | | | | | | Public high school | 565 | 309 | 1 | | | Nonpublic high school | 73 | 75 | 0.53 (0.38, 0.76) | 0.76 (0.50, 1.14) | 0.178 | Depression | | | | | | Nondepressed | 417 | 331 | 1 | | | Depressed | 221 | 53 | 3.31 (2.37, 4.62) | 3.30 (2.31, 4.72) | <0.001 |
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