Table 3. Conditional Probabilities of Meeting Criteria Within Latent Frailty Classes: ILAS*.

Rho estimate	3-class model			4-class model
	Class 1 (Non-frail)	Class 2	Class 3	Class 1	Class 2 (Non-frail)	Class 3	Class 4
Class prevalence (%)	55.5	25.0	19.5	3.6	55.4	15.8	25.3
Weight loss	0.0257	0.1072	0.0600	0.1030	0.0148	0.0532	0.1284
Exhaustion	0.0190	0.0003	0.1494	0.2007	0.0201	0.1350	0.0004
Low physical activity	0.1633	0.0152	0.5402	0.8851	0.1592	0.4657	0.0250
Slowness	0.0048	0.3499	0.7497	0.2427	0.0078	0.9442	0.2930
Weakness	0.0593	0.2749	0.5898	0.4362	0.0930	0.6130	0.2081

ILAS, The I-Lan Longitudinal Aging Study. *Per class and criterion: Estimated proportion in class exhibiting the criterion.