Table 4.

Parameter estimates for linear growth model of daily (“yes”) responses per day as a function of hazard and nonhazard AUDIT group membership.

Parameter		Estimate (SE)	t/z a	df	P value	95% CI
Fixed effects (intercept, slopes)
	Intercept (Day 0)	0.32 (0.02)	18.24	982.85	<.001	0.28 to 0.35
	Time	–0.003 (0.001)	–3.63	13418.00	<.001	–0.004 to –0.001
	Hazard	0.15 (0.03)	5.99	982.85	<.001	0.10 to 0.20
	Hazard by time	–0.004 (0.001)	–3.53	13418.00	<.001	–0.006 to –0.002
Random effects ([co-]variances)
	Between-person (level 2) intercept	0.08 (0.01)	16.86	—b	<.001	0.07 to 0.09
	Within-person (level 1) residual	0.14 (0.002)	81.91	—	<.001	0.14 to 0.15

^at test value for fixed effects parameters; Wald z value for random effects parameters.

^bNot applicable.