. 2021 Dec 23;102(3):pzab299. doi: 10.1093/ptj/pzab299

Table 3.

Predictors of Hand Grip Strength and Sit-to-Stand Test Performance^a

	Women				Men
Muscle Strength Test and Candidate Predictor	Estimate	SE	P	R ²	Estimate	SE	P	R ²
Hand grip strength, kg				0.315				0.384
Age, y	−0.028	0.009	.002		−0.064	0.023	.005
Race
Height, m	0.362	0.022	<.001		0.430	0.052	<.001
Weight, kg
BMI, kg/m²
PROMIS PF CAT	0.097	0.020	<.001		0.166	0.049	.001
ASM/height², kg/m²	1.110	0.098	<.001		2.787	0.270	<.001
5×-STS, s^b
30s-STS, no. of stands^b	0.369	0.036	<.001		0.457	0.088	<.001
Constant	−51.052	3.866	<.001		−71.224	9.648	<.001
5×-STS , s				0.305				0.247
Age, y	0.014	0.004	<.001		0.023	0.006	<.001
Race			<.001				.001
Asian vs White	0.296	0.202	.144		−0.182	0.308	.554
Black vs White	1.102	0.209	<.001		1.606	0.392	<.001
Other vs White	−0.418	0.497	.400		0.548	0.730	.453
Height, m	0.059	0.010	<.001		0.047	0.014	.001
Weight, kg	0.038	0.005	<.001
BMI, kg/m²
PROMIS PF CAT	−0.081	0.008	<.001		−0.084	0.012	<.001
ASM/height², kg/m²	−0.203	0.064	.002
Hand grip strength, kg	−0.092	0.010	<.001		−0.051	0.009	<.001
Constant	4.281	1.620	.008		6.425	2.441	.009
30s-STS, no. of stands				0.305				0.247
Age, y	−0.026	0.006	<.001		−0.029	0.010	.005
Race			<.001				.005
Asian vs White	−0.131	0.343	.703		0.390	0.558	.485
Black vs White	−1.828	0.352	<.001		−2.440	0.708	.001
Other vs White	1.535	0.842	.069		−0.792	1.318	.548
Height, m	−0.120	0.016	.001
Weight, kg	−0.071	0.009	<.001		−0.111	0.025	<.001
BMI, kg/m²					0.232	0.083	.006
PROMIS PF CAT	0.136	0.014	<.001		0.124	0.023	<.001
ASM/height², kg/m²	0.457	0.108	<.001
Hand grip strength, kg	0.163	0.016	<.001		0.113	0.017	<.001
Constant	27.394	2.738	<.001		9.676	1.983	<.001

^{^a}Determined using stepwise linear regression with age forced to stay in the model. 30s-STS = 30-s sit-to-stand test; 5×-STS = 5-times sit-to-stand test; ASM = appendicular skeletal muscle mass; BMI = body mass index; IQR = interquartile range; PROMIS PF CAT = physical function domain of the National Institutes of Health Patient-Reported Outcomes Measurement Information System computerized adaptive test.

^{^b}Either the 5×-STS or the 30s-STS was included, depending on which yielded the highest R² value in the stepwise regression.