Table 3 Risk of relapse after the index substance use for related variables estimated by Cox proportional hazards model
Variables | Cox regression model | |
|---|---|---|
aHR (95% CI) | P-value | |
Age (years) | 0.86 (0.60–1.21) | 0.383 |
Sex | ||
 Male | 1 |  |
 Female | 0.43 (0.14–1.34) | 0.145 |
Substance use | ||
 Ketamine | 1 |  |
 MDMA or methamphetamine | 2.27 (1.02–5.06) | 0.046* |
Previous conviction record | ||
 Without | 1 |  |
 With | 1.37 (0.55–3.42) | 0.501 |
Academic or social status | ||
 Attending school | 1 |  |
 Employed | 0.48 (0.18–1.27) | 0.138 |
 Dropout and unemployed | 0.96 (0.39–2.37) | 0.925 |
Family status | ||
 Double-parent families | 1 |  |
 Single-parent families | 2.77 (1.24–6.21) | 0.013* |
 Grandparent(s) | 0.58 (0.12–2.74) | 0.489 |
Change of behavior-problem | 10.51 (1.70–65.01) | 0.011* |
Change of family APGAR-caregivers | 0.75 (0.38–1.49) | 0.414 |