Table 3.
Results of analyses of covariance (ANCOVAs) and Cohen d for the nonbinary coprimary outcomes (intention-to-treat [ITT] and per-protocol [PP] analyses) 8 weeks after baseline assessmenta.
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Baseline assessment (IGb: n=523; CGc: n=522), mean (SD) | Postinterventi on assessment observed (PP; IG: n=253; CG: n=301), mean (SD) | Postintervention assessment estimated, mean (SD) | ANCOVA (ITT, multiple imputation) | ANCOVA (PP) | RFLBd | ||||||||||||||||||||||||||
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F test (df) |
P value |
Cohen d (95% CI) | F test (df) |
P value |
Cohen d (95% CI) | Lower bounde (SD) | Upper bounde (SD) | |||||||||||||||||||||
| Mental health literacy (MHLqf) | 0.57 (99, 1130.75) | .45 | 0.01 (−0.13 to 0.16) | 0 (1, 551) | .95 | 0.02 (−0.14 to 0.19) | −1.23 (0.69) | 0.89 (0.6) | ||||||||||||||||||||||||
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Intervention | 121.53 (9.12) | 121.85 (10.72) | 121.87 (11.64) |
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Control | 121.02 (9.17) | 122.06 (8.48) | 122.03 (8.71) |
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| Mental health–related patient empowerment and self-management skills (AMHPSSg) | 12.84 (99, 774.22) | <.001 | 0.29 (0.15 to 0.43) | 13.29 (1, 155) | <.001 | 0.28 (0.11 to 0.44) | 2.96 (1.86) | 8.44 (1.56) | ||||||||||||||||||||||||
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Intervention | 68.44 (18.44) | 75.72 (19.05) | 75.44 (19.54) |
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Control | 66.37 (18.95) | 70.41 (19.48) | 69.62 (20.46) |
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| Attitudes toward help seeking (IASMHSh) | 2.26 (99, 1012.95) | .13 | 0.12 (−0.02 to 0.26) | 2.58 (1, 551) | .11 | 0.12 (−0.05 to 0.29) | −0.27 (1.05) | 2.40 (0.73) | ||||||||||||||||||||||||
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Intervention | 49.68 (9.19) | 51.93 (9.59) | 51.97 (9.59) |
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Control | 49.18 (9.95) | 50.73 (10.14) | 50.77 (10.42) |
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aThe F test results were pooled using the D2 statistic [65].
bIG: intervention group.
cCG: control group.
dRFLB: Random Forest Lee Bound.
eThese are lower and upper bounds of the Random Forest Lee Bound procedure.
fMHLq: Mental Health Literacy Questionnaire.
gAMHPSS: Assessment of Mental Health Related Patient Empowerment and Self-Management-Skills.
hIASMHS: Inventory of Attitudes Toward Seeking Mental Health Services.