Table 3. Intention-to-treat analysis of latent growth curve modeling of depressive symptoms in the overall samplea. The Gelman–Rubin statistic (rhat) for all coefficients was 1.0.
| Depressive symptoms | Intervention effect | Baseline (Wave 1), mean (SD) | Wave 2, mean (SD) | Wave 3, mean (SD) | Wave 4, mean (SD) | SMDb | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| B | 95% LLc | 95% ULd | Wald | P value | ||||||
| Experiment | –0.319 | –0.543 | –0.08 | –2.703 | .007e | 8.78 (6.06) | 8.51 (5.78) | 7.93 (5.63) | 7.45 (5.66) | –0.12 |
| Waitlist | —f | — | — | — | — | 8.1 (5.99) | 8.29 (5.81) | 8.11 (6.02) | 7.24 (5.8) | — |
a
Widely Applicable Bayesian Information Criterion (WAIC) -10658.7, leave-one-out (LOO) -10801.2.
b
SMD: Standardized Mean Difference.
c
LL: lower limit.
d
UL: upper limit.
e
P<.01.
f
Not applicable.