Table 1.
Comparison of the baseline and third-month mean scores on the PSS-10, PHQ-9, and GAD-7 and the prevalence rates of moderate or high stress, likely MDD, and likely GAD*+
| Measure | N | Baseline Scores | Third-month Scores | Mean Difference (SD) | 95% Confidence Interval | df | t-value | P−value | Effect size (Cohen’s d) |
|---|---|---|---|---|---|---|---|---|---|
| Mean (SD) | Mean (SD) | ||||||||
| PSS-10 | 335 | 20.21(7.23) | 19.07(7.74) | 1.149 (6.317) −5.7% from baseline |
0.47-1.83 | 334 | 3.33 | <0.001 | |
| PHQ-9 | 302 | 9.32(6.23) | 8.36 (6.62) | 0.96 (5.28) −10.3% from baseline |
0.36-1.56 | 301 | 3.16 | 0.002 | |
| GAD-7 | 292 | 9.07(6.02) | 7.01(5.84) | 2.06 (4.92) −22.7% from baseline |
1.49-2.62 | 292 | 7.16 | <0.001 | |
| * Not all subscribers completed all 3 scales; therefore, the N for each scale is less than the Total N. | |||||||||
+
Moderate or high perceived stress, likely GAD, and likely MDD were assessed using cutoff scores of PSS-10 ≥ 14, PHQ-9 ≥ 10, and GAD-7 ≥ 10, respectively.