Table 9.

Covariance parameters for the interactive effect of condition and time (study phase) predicting daily self-reported depression.

Parameter	Estimate (SE)	Z valuea	P value
Intercept	0.422 (0.104)	4.08	<.001
Study phase (3 vs 1)	0.359 (0.035)	10.29	<.001
Residual (VCb)	0.544 (0.028)	19.30	<.001

^aThe Z value represents the test value of the z distribution on which statistical significance is determined for this analysis.

^bVC: variance component (method for structuring the covariance matrix).