Table 2 Cox regression analysis examining predictors of dropout (N = 147)

Factors

HR (95% CI)^a

p

HR (95% CI)^a

p

Condition (non-intervention as reference)

0.81 (0.39–1.70)

0.575

1.11 (0.51–2.41)

0.787

Age

0.99 (0.96–1.02)

0.451

–

–

Sex

0.75 (0.33–1.71)

0.496

–

–

Living alone or unstable living conditions

1.27 (0.59–2.76)

0.539

–

–

Welfare benefits

1.44 (0.65–3.19)

0.366

–

–

Education

0.84 (0.74–0.96)

0.009

0.85 (0.74–0.98)

0.025

Substance use severity^b

1.32 (0.85–2.07)

0.220

1.33 (0.83–2.12)

0.239

Substance use diagnosis (drug use disorder)

2.37 (1.01–5.58)

0.048

2.13 (0.88–5.11)

0.092

Mental distress^c

0.93 (0.56–1.55)

0.789

0.85 (0.49–1.47)

0.560