Table 1.

Latent class multivariate mixture model for 12-month post-TKR change in physical function (SF12/PCS)

Predictors		95% Conf. Interval		P > z
		Lower	Upper
Male	0.638	0.050	1.225	0.033
Age (+1 year)	−0.031	−0.065	0.003	0.073
BMI < 30	Ref.
BMI 30–39	−1.068	−1.689	−0.447	0.001
BMI 40–49	−1.632	−2.576	−0.689	0.001
BMI ≥ 50	−1.857	−4.310	0.597	0.138
Baseline MCS	0.038	0.009	0.066	0.010
Baseline PCS	−0.844	−0.903	−0.784	0.000
Osteoarthritis	2.610	1.222	3.998	0.000
Poor quadriceps strength	−1.763	−4.729	1.204	0.244
Constant	25.6	22.5	28.8	0.000
Probability estimates: low functional responders
Predictors	Odds ratio	95% Conf. Interval
		Lower	Upper
Age (+1 year)	1.01	1.00	1.02
BMI ≥ 50 kg/m2	2.33	1.09	4.99
Baseline MCS	0.95	0.94	0.96
Baseline PCS	0.91	0.89	0.92
Fair quadriceps strength	1.34	1.02	1.75
Poor quadriceps strength	2.28	0.79	6.61