Table 3.

Results of post hoc analyses of trajectories of change for the slope of outcome variables using latent growth curve modeling from baseline, postintervention, and 6-month follow-up, with a least one session attended as a moderator for all enrolled participants*

Outcome Variable	Model Fit	Group Assignment Effect on Slope	Model Fit Indices
Quality of life: FACT-B	Reasonable model fit	b = 0.024, z = 3.727, P < .01	Model fit: χ2 (2) = 4.009, P = .14, CFI = 0.99, RMSEA = 0.094, SRMR = 0.027
Total mood disturbance: POMS-SV	Poor model fit	b = −.67, z = −1.51, ns	Model fit: χ2 (3) = 1.25, P =.74, CFI = 1.00, RMSEA = 0.000, SRMR = 0.016
Intrusive thoughts: IES-R-Int	Poor model fit	b = .56, z = 1.47, ns	Model fit: χ2 (3) = 3.08, P = .38, CFI = .999, RMSEA = 0.015, SRMR = 0.04
Depressive symptoms: CES-D	Reasonable model fit	b =−1.218, z = −2.30, P = .02	Model fit: χ2 (3) = 5.365, P = .147, CFI = 0.98, RMSEA = 0.083, SRMR = 0.22
Perceived stress: PSS, 4-item	Poor model fit	b = −.35, z = −2.43, P = .02	Model fit: χ2 (3) = 16.82, P = .001, CFI = 0.88, RMSEA = 0.20, SRMR = 0.055

*Model fit is evaluated by a combination of nonsignificant chi-square, CFI > .95, RMSEA < .06, and SRMR < .08. The Z-statistic of the unstandardized coefficients was examined to interpret direct and indirect associations. CFI = comparative fit index; CES-D = Center for Epidemiologic Studies-Depression; FACT-B = Functional Assessment of Cancer Therapy-Breast; IES-R-Int = Impact of Event Scale-Revised—Intrusive Thoughts; ns = not significant; POMS-SV = Profile of Mood States Short Version; PSS = Perceived Stress Scale; RMSEA = root mean square error of approximation; SRMR = standardized root mean square residual; Time 1 = baseline; Time 2 = postintervention; Time 3 = 6-month follow-up.