Table 2.

Estimated Trajectory Groups and Group-Specific Growth Parameters, Before Adjusting for Time-Varying Covariates (M_1.0)

	Excellent functional health	Good functional health with small increasing disability	High but stable disability	Accelerated increase in disability	Persistent severe disability
Growth parameter
Intercept	−4.711***	−0.432***	3.436***	3.247***	8.634***
Linear slope	0.100**	0.459***	−0.019	1.351***	0.230**
Quadratic slope	0.009	0.005	−0.045***	0.012	−0.055***
Cubic slope	0.006**	−0.004*	0.005	−0.018***	0.002
Group proportion (%)	61.29	24.65	7.27	4.00	2.79
Sigma			2.534***
Model fit statistics
BIC (N = 71,124)			−61,656.46
BIC (N = 18,486)			−61,639.62
AIC fit index			−61,541.81
Log likelihood			−61,516.81

Notes: Level 1, N = 71,124; Level 2, N = 18,486. Data reflect aggregate results from multiple imputation. BIC = Bayesian information criterion; AIC = Akaike's information criterion.

*p < .05; **p < .01; ***p < .001.