Table 5. The multiple stepwise linear regression analysis that assumed FEV1 as a dependent variable with being adjusted by age and height.

	Partial regression coefficient	Standard partial regression coefficient	95% confidence interval	VIF
(Constant)	0.453		−2.453 to 3.359
Age	−0.023	−0.413**	−0.032 to −0.014	1.252
Height	0.019	0.195	−0.001 to 0.039	2.101
Percentage of body fat		0.033		3.847
Fat free mass	0.023	0.239*	0.000 to 0.046	2.693
Upper extremity muscle mass		−0.022		11.305
Lower extremity muscle mass		−0.163		12.546
Trunk muscle mass		0.033		13.846
Visceral fat area	−0.004	−0.290**	−0.007 to −0.002	1.542
Smoking index		−0.030		1.214
No MetS risk factors		0.041		1.127

*p<0.05, **p<0.01. ANOVA<0.001. R=0.720, R²=0.518, adjusted R²=0.497. VIF: Variance Inflation Factor, MetS: Metabolic Syndrome