Table 3.

Association between CT-measured skeletal muscle index (SMI_CT) and lung function.

Variable	FVC			FEV1			FEV1/FVC (%)
	β	SE	p Value	β	SE	p Value	β	SE	p Value
Male
SMICT, cm2/(kg/m2) 1	0.132	0.013	<0.001	0.094	0.011	<0.001	−0.252	0.140	0.071
SMICT, cm2/(kg/m2) 2	0.128	0.013	<0.001	0.093	0.011	<0.001	−0.196	0.139	0.159
SMICT, cm2/(kg/m2) 3	0.062	0.012	<0.001	0.045	0.010	<0.001	−0.108	0.146	0.457
Female
SMICT, cm2/(kg/m2) 1	0.067	0.016	<0.001	0.059	0.013	<0.001	0.109	0.231	0.637
SMICT, cm2/(kg/m2) 2	0.066	0.016	<0.001	0.060	0.013	<0.001	0.157	0.232	0.499
SMICT, cm2/(kg/m2) 3	0.028	0.015	0.059	0.032	0.012	0.010	0.272	0.239	0.256

¹ Adjusted for age and body mass index (BMI). ² Adjusted for age, BMI, smoking, and exercise. ³ Adjusted for age, BMI, smoking, exercise, systolic blood pressure (BP), diastolic BP, height, total cholesterol, triglycerides, high-density lipoprotein (HDL) cholesterol and hemoglobin A1c. β linear regression coefficient; SE, standard error of β.