Table 3.

Multivariable Linear and Quadratic Associations Between Sedentary Behavior and Muscle Area and Density

	Sedentary Behavior per 1 SD Increment (18 MET h wk−1)
	Model
	1	2	3	4
Locomotor muscle area
sedentary behavior	0.076	0.071	0.052	0.057
sedentary behaviorquadratic	−0.069	−0.065	−0.047	−0.048
Stability muscle area
sedentary behavior	0.051	0.033	0.046	0.052
sedentary behaviorquadratic	−0.028	−0.021	−0.041	−0.043
Total abdominal muscle area
sedentary behavior	0.061	0.045	0.050	0.056
sedentary behaviorquadratic	−0.041	−0.034	−0.045	−0.047
Locomotor muscle density
sedentary behavior	0.055	0.090	0.196**	0.218**
sedentary behaviorquadratic	−0.112	−0.133*	−0.213**	−0.227**
Stability muscle density
sedentary behavior	0.021	0.065	0.126*	0.142**
sedentary behaviorquadratic	−0.062	−0.095	−0.137*	−0.143**
Total abdominal muscle density
sedentary behavior	0.032	0.077	0.151	0.169**
sedentary behaviorquadratic	−0.080	−0.112*	−0.164**	−0.172**

Abbreviations: MET, metabolic equivalent; MVPA, moderate to vigorous physical activity. Note: Data are presented as standardized betas for linear and quadratic terms from multivariable regression analyses. Model 1: age, sex, race/ethnicity, and MVPA; model 2: model 1 + smoking, diabetes, hypertension, and dyslipidemia; model 3: model 2 + height, subcutaneous and visceral fat; model 4: model 3 + inflammatory markers. Boldface indicates statistical significance

^*P < .05,

^**P < .01.