Table 4. Logistic regression model for CBT uptake at 6 and 12 months.
| Comparison | Adjusted odds ratio | 95% CI | p | |
|---|---|---|---|---|
| 6 months | ||||
| Group | cCBT versus WL | 0.42 | (0.24–0.73) | 0.002* |
| GSH versus WL | 0.48 | (0.22–1.03) | 0.06 | |
| cCBT versus GSH | 0.87 | (0.42–1.84) | 0.718 | |
| Baseline outcome measures | Y-BOCS-OR | 1.02 | (0.97–1.06) | 0.514 |
| GAD-7 | 0.99 | (0.94–1.04) | 0.591 | |
| PHQ-9 | 1.02 | (0.98–1.07) | 0.271 | |
| Antidepressant medication | Yes | 0.71 | (0.46–1.09) | 0.117 |
| Duration of OCD | 6–9 years | 1.26 | (0.60–2.64) | 0.552 |
| 10 or more years | 0.89 | (0.55–1.42) | 0.619 | |
| Gender | Male | 1.12 | (0.73–1.73) | 0.606 |
| Exponential Function (Constant) | 2.14 | (0.67–6.82) | 0.201 | |
| 12 months | ||||
| Group | cCBT versus WL | 0.34 | (0.15–0.79) | 0.011* |
| GSH versus WL | 0.27 | (0.12–0.60) | 0.001* | |
| cCBT versus GSH | 1.27 | (0.53–3.00) | 0.59 | |
| Baseline outcome measures | Y-BOCS-OR | 1.03 | (0.97–1.08) | 0.36 |
| GAD-7 | 1.03 | (0.97–1.08) | 0.341 | |
| PHQ-9 | 0.99 | (0.94–1.04) | 0.73 | |
| Antidepressant medication | Yes | 1.02 | (0.63–1.67) | 0.933 |
| Duration of OCD | 6–9 years | 2.66 | (1.03–6.89) | 0.043 |
| 10 or more years | 0.99 | (0.59–1.67) | 0.968 | |
| Gender | Male | 1.25 | (0.76–2.03) | 0.395 |
| Exponential Function (Constant) | 2.86 | (0.76–10.81) | 0.121 |
* Note, the Bonferroni corrected significance level is 1.67%, for 3 pair-wise comparisons.
** Note, results are taken from a logistic regression model and any “effect” should be interpreted as an odds ratio.
Abbreviations: cCBT, computerised cognitive-behaviour therapy; GAD-7, Generalised Anxiety Disorder 7-item; GSH, guided self-help; OCD, obsessive-compulsive disorder; PHQ-9, Patient Health Questionnaire; Y-BOCS-OR, Yale-Brown Obsessive Compulsive Scale–Observer-Rated; WL, waiting list.