Table 2.

Latent growth model fit statistics and chi-square difference test for Dementia Rating Scale

Model	${\chi }_M^2$(dfM)	CFI	RMSEA (90% CI)	SRMR	${\chi }_D^2$ (dfD)
Fixed intercept	587.826(5)**	0.000	0.409 (0.381–0.437)	0.801	–
Random intercept	264.295(4)**	0.535	0.306 (0.275–0.337)	0.577	323.531(1)**
Random intercept, fixed slope	76.559(3)**	0.869	0.188 (0.153–0.225)	0.402	187.736(1)**
Random intercept, random slope	0.967(1)	1.000	0.000 (0.000–0.099)	0.033	75.592(2)**
Random intercept, random slope, fixed quadratic	0.000(0)**	1.000	0.000 (0.000–0.000)	0.000	0.967(1)
Random intercept, random slope, random quadratic	No convergence

${\chi }_M^2$ Chi-square test of model fit, df_M Degrees of freedom for model fit, RMSEA Root mean square error of approximation, CFI Comparative fix index, SRMR Standardized root mean square residual, ${\chi }_D^2$ Chi-square test of difference, df_D Degrees of freedom for chi-square difference test

**p < 0.001