Table 4.

Model Fit and Parameter Estimates for Latent Growth of SIP-SD and Indirect Effect from Group Condition to Outcome Variables via ABS-POS

	Model Fit
Chi-square	χ2(30) = 26.56, p = .65
RMSEA	.00
CFI	1.00
SRMR	.04
Statistic	Estimate (SE)	95% CI
Intercept α	64.18 (5.05)***	[54.29, 74.07]
Slope β	−.71 (.42)	[−1.53, .11]
ABS-POS T1	3.63 (.09)***	[3.46, 3.80]
Δ ABS-POS	1.90 (.23)***	[1.45, 2.36]
CBT vs. HE → α	3.76 (1.97)	[−.10, 7.63]
CBT vs. HE → β	.06 (.16)	[−.26, .38]
RT vs. HE → α	3.75 (1.88)	[.06, 7.44]
RT vs. HE → β	−.32 (.16)*	[−.63, −.01]
CBT vs. HE → ABS-POS T1	−.37 (.12)**	[−.61, −.13]
RT vs. HE → ABS-POS T1	−.29 (.12)*	[−.52, −.06]
CBT vs. HE → Δ ABS-POS	−.06 (.09)	[−.25, .12]
RT vs. HE → Δ ABS-POS	−.15 (.09)	[−.33, .03]
ABS-POS T1 → Δ ABS-POS	−.50 (.06)***	[−.62, −.38]
Δ ABS-POS → β	−.65 (.33)*	[−1.29, −.01]
CBT vs. HE Indirect Effect	.04 (.06)	[−.08, .16]
RT vs. HE Indirect Effect	.10 (.09)	[−.05, .25]

Note. SIP-SD = social disruption subscale of Sickness Impact Profile; ABS-POS = total positive affect subscale of Affect Balance Scale; CI = confidence interval; RMSEA = root-mean-square error of approximation; CFI = comparative fit index; SRMR = standardized root-mean-square residual; CBT = cognitive behavioral therapy; RT = relaxation therapy; HE = health education; α = intercept factor; β = slope factor; Unstandardized estimates (standard error) shown;

^*p < .05;

^**p < .01;

^***p < .001.