Table 5.
Differences in least-square mean questionnaire scores between time points.
| Measure | Time point contrast | Least-squares mean (SE) | 95% CI (lower–upper) | Least-squares mean (SE) | 95% CI (lower–upper) | Estimated difference (SE) | 95% CI (lower–upper) | t (df) | p |
|---|---|---|---|---|---|---|---|---|---|
| PHQ-9 | Baseline–iCBT exit | 15.408 (0.557) |
14.31–16.51 | 11.837 (0.540) |
10.77–12.91 |
3.570
(0.516) |
2.55–4.59 | 6.921 (220) | <.001 |
| iCBT exit–service exit: completers | 11.529 (0.722) |
10.1–12.96 | 7.456 (0.722) |
6.03–8.89 | 4.074 (0.666) |
2.76–5.39 | 6.116 (217) | <.001 | |
| iCBT exit–service exit: Dropouts | 12.145 (0.803) |
10.56–13.73 | 12.298 (0.853) |
10.61–13.99 | −0.153 (0.795) |
−1.73–1.42 | −0.192 (222) | 0.848 | |
| GAD-7 | Baseline–iCBT exit | 14.600 (0.478) |
13.65–15.55 | 11.374 (0.465) |
10.45–12.29 | 3.226 (0.430) |
2.37–4.08 | 7.497 (221) | <.001 |
| iCBT exit–service exit: completer | 10.912 (0.622) |
9.68–12.14 | 6.926 (0.622) |
5.69–8.16 | 3.985 (0.555) |
2.89–5.08 | 7.177 (219) | <.001 | |
| iCBT exit–service exit: Dropouts | 11.836 (0.691) |
10.47–13.20 | 12.001 (0.732) |
10.55–13.45 | −0.164 (0.663) |
−1.48–1.15 | −0.248 (224) | 0.805 | |
| WSAS | Baseline–iCBT exit | 19.151 (0.825) |
17.52–20.78 | 16.725 (0.805) |
15.13–18.32 | 2.426 (0.685) |
1.07–3.78 | 3.542 (220) | 0.001 |
| iCBT exit–service exit: completers | 16.941 (1.076) |
14.81–19.07 | 12.838 (1.076) |
10.71–14.97 | 4.103 (0.883) |
2.35–5.85 | 4.644 (218) | <.001 | |
| iCBT exit–service exit: Dropouts | 16.509 (1.197) |
14.14–18.88 | 16.341 (1.258) |
13.85–18.83 | 0.168 (1.056) |
−1.92–2.26 | 0.159 (222) | 0.874 |
iCBT, internet-delivered cognitive behavioral therapy; SE, standard error.