Table 4.
Prediction of treatment abstinence rates after 12 months with predictors suggestibility, treatment condition, efficacy of CBT and HT, total sample (n = 256).
| Odds ratio | Std. Err | z | p | 95% CI | |
|---|---|---|---|---|---|
| Continuous abstinence according to Russell standard | |||||
| zt | 0.892 | 0.013 | −7.93 | <0.001 | 0.867–0.918 |
| zt 2 | 1.001 | 0.002 | 3.77 | <0.001 | 1.004–1.013 |
| Suggestibility | 1.018 | 0.045 | 0.42 | 0.677 | 0.935–1.110 |
| Treatment condition | 1.376 | 0.297 | 1.48 | 0.139 | 0.902–2.101 |
| Efficacy expectation CBT | 1.270 | 0.086 | 3.51 | <0.001 | 1.111–1.451 |
| Efficacy expectation HT | 0.872 | 0.051 | −2.34 | 0.019 | 0.779–0.978 |
| Seven day point prevalence abstinence | |||||
| zt | 0.931 | 0.013 | −5.17 | <0.001 | 0.906–0.957 |
| zt 2 | 1.004 | 0.003 | 1.58 | 0.114 | 0.999–1.009 |
| Suggestibility | 1.013 | 0.042 | 0.31 | 0.760 | 0.934–1.098 |
| Treatment condition | 1.471 | 0.307 | 1.85 | 0.064 | 0.977–2.214 |
| Efficacy expectation CBT | 1.263 | 0.079 | 3.73 | <0.001 | 1.117–1.427 |
| Efficacy expectation HT | 0.883 | 0.048 | −2.30 | 0.021 | 0.794–0.982 |
zt, centered time variable; zt2, squared centered time variable; suggestibility (centered); treatment condition (0 = HT, 1 = CBT); HT, hypnotherapy; CBT, cognitive-behavioral therapy; CI, confidence interval; efficacy expectation: “How high would you rate the general efficacy of CBT/HT?”