Table 2.

Intercept and Slope of Each Class (n = 8267).

Parameter Estimate	Moderate to Low-Risk Class	Low to Moderate-Risk Class	Stable Moderate-Risk Class	Stable Low-Risk Class
	(Class 1, 7.31%)	(Class 2, 5.93%)	(Class 3, 13.25%)	(Class 4, 73.52%)
(Wave 1) Mean ± S.D	15.19 ± 5.82	5.02 ± 4.43	11.01 ± 5.10	2.77 ± 3.43
(Wave 11) Mean ± S.D	6.10 ± 4.48	12.01 ± 5.64	10.27 ± 4.15	2.18 ± 2.89
Intercept	14.808 (<0.001)	3.411 (<0.001)	10.594 (<0.001)	2.352 (<0.001)
Linear term	−0.900 (<0.001)	0.869 (<0.001)	−0.002 (0.974)	−0.030 (<0.001)