Table 2.

Secondary Analyses of Change in Global Cognition and Purpose

Model Description	N	Cognition → Purpose			Purpose → Cognition			Model Fit
		Estimate	SE	p	Estimate	SE	p	RMSEA	SRMR	TLI	CFI
A. Linearity test	1,049	0.060	0.017	0.001	0.014	0.003	<0.001	0.027	0.039	0.989	0.987
B. Equidistant interval test	1,049	0.091	0.028	0.001	0.020	0.003	<0.001
C. Exclude MCI	759	0.082	0.022	<0.001	0.015	0.002	<0.001	0.025	0.029	0.988	0.989
D. Time varying depression	523	0.095	0.029	<0.001	0.015	0.003	<0.001	0.044	0.083	0.971	0.974
E. Time varying disability	514	0.083	0.029	0.004	0.015	0.003	<0.001	0.040	0.078	0.975	0.978

Note. Data are from separate bivariate latent curve models with cross lagged components adjusted for age, sex, and education. They indicate the result of a 1-unit shift in cognition (or purpose) on purpose (or cognition) one year later. SE, standard error; MCI, mild cognitive impairment; RMSEA, root mean square error of approximation; SRMR, standardized root mean square residual; TLI, Tucker-Lewis index; CFI, comparative fit index.