Technical Appendix.

Group-based trajectory group model for Males and Females

Trajectory Group	Males	Females
	Estimate (SE)
High
Intercept	−17.87 (1.26)**	−16.51 (0.88)**
Linear	1.87 (0.12)**	1.77 (0.09)**
Quadratic	−0.04 (0.002)**	−0.04 (0.002)**
Decrease
Intercept	−26.34 (3.84)**	−19.78 (4.37)**
Linear	2.99 (0.39)**	2.30 (0.45)**
Quadratic	−0.08 (0.01)**	−0.06 (0.01)**
Increase
Intercept	−39.47 (1.94)**	−42.03 (1.55)**
Linear	3.54 (0.18)**	3.89 (0.14)**
Quadratic	−0.07 (0.004)**	−0.09 (0.003)**
Low
Intercept	5.14 (3.45)	−59.00 (11.61)**
Linear	−1.00 (0.33)**	4.74 (1.03)**
Quadratic	0.03 (0.008)**	−0.09 (0.02)**
Sigma	1.28 (0.009)**	1.17 (0.007)**
Group membership
	Observed (Estimated)
High	38.9% (38.0 %)	42.4% (41.4 %)
Decrease	12.0% (13.9 %)	6.1% (7.1 %)
Increase	34.0% (32.8 %)	35.9% (36.1 %)
Low	15.1% (15.3 %)	15.6% (15.4 %)
BIC	−34394.25	−34020.49

^**p < .01