| | Variables | Beta | B (95% CI) |
| | (Constant) | … | 2.24 (0.89, 3.59) | | Age of the student | | | | … | 0.03 | 0.01 (−0.04, 0.06) | | Sex | | | | Female | | | | Male | 0.29 | 0.35 (0.19, 0.52) | | Marital status | | | | Single | | | | Ever married | −0.11 | −0.27 (−0.58, 0.04) | | In open relationship | −0.05 | −0.08 (−0.27, 0.11) | | Origin of residence | | | | Rural | | | | Urban | −0.17 | −0.19 (−0.32, −0.06) | | Year of study | | | | … | 0.02 | 0.01 (−0.06, 0.07) | | Current smoking | | | | Yes | −0.19 | −0.27 (−0.46, −0.09) | | No | | | | Current khat chewing | | | | Never | | | | Monthly or less | −0.004 | −0.01 (-0.20, 0.19) | | At least weekly | −0.17 | −0.24 (−0.44, −0.04) | | Having intimate friend who uses substance | | | | No | | | | Yes | −0.15 | −0.17 (−0.31, −0.03) | | Parent substance use | | | | Yes | 0.02 | 0.03 (−0.10, 0.16) | | No | | | | Hostel service user | | | | Yes | 0.08 | 0.09 (−0.06, 0.24) | | No | | | | Happy for using substance | | | | Yes | −0.04 | −0.04 (−0.18, 0.09) | | No | | | | Any illness during the stay in the university | | | | Yes | 0.09 | 0.18 (−0.04, 0.40) | | No | | | | Interest in department (field of study) | | | | No | −0.01 | −0.02 (−0.19, 0.15) | | Yes | | | Problematic substance use
(CAGE-AID score ≥ 2) | | | | Yes | −0.09 | −0.10 (−0.24, 0.04) | | No | | | | Current substance use | | | | Yes | 0.06 | 0.47 (−0.48, 1.43) | | No | | | | Religion | | | | Orthodox | | | | Muslim | −0.03 | −0.06 (−0.31, 0.18) | | Protestant | −0.07 | −0.09 (−0.24, 0.06) | | Substance starting time | | | | Never | | | | Before joining WSU§ | | | | At 1st year | −0.07 | −0.09 (−0.25, 0.07) | | Second year & above | −0.01 | −0.02 (−0.19, 0.16) | | Drinking alcohol | | | | Never | | | | Monthly | −0.08 | −0.11 (−0.27, 0.05) | | Weekly | −0.01 | −0.02 (−0.21, 0.17) | | Daily | −0.22 | −0.51 (−0.79, −0.23) |
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