. Author manuscript; available in PMC: 2021 May 18.

Published in final edited form as: Psychol Assess. 2020 Jun 15;32(9):872–882. doi: 10.1037/pas0000915

Table 3 -.

Best Fitting Model Parameter Estimates

	Continuous Growth - Quadratic							Piecewise Growth - Linear-Quadratic Knot T3
	Continuous Growth - Quadratic							Piecewise Growth - Linear-Quadratic Knot T3
	Estimate (SE)	95% CI	Standardized	p-value	Variance	95% CI	p-value	Estimate (SE)	95% CI	Standardized	p-value	Variance	95% CI	p-value
Intercept	5.638 (0.21)	[5.22, 6.05]	1.23	<.001	21.16	[18.12, 24.21]	<.001	4.64 (0.18)	[4.29, 4.99]	1.17	<.001	15.79	[13.51, 18.07]	<.001
Linear Slope	−0.432 (0.06)	[−0.54, −0.32]	−0.48	<.001	0.82	[0.62, 1.02]	<.001	−0.637 (0.10)	[−0.83, −0.45]	−0.75	<.001	0.73	[−0.08, 1.54]	0.078
Linear Second Slope	-	-	-	-	-	-	-	−0.222 (−0.21)	[−0.34, −0.11]	−0.21	<.001	1.15	[0.89, 1.4]	<.001
Quadratic Slope	0.025 (0.004)	[0.02, 0.03]	0.39	<.001	0.004	[0.003, 0.005]	<.001	0.015 (0.15)	[0.004, 0.03]	0.15	0.01	0.01	[0.008, 0.01]	<.001