Table 3 Threshold effect analysis of skeletal muscle mass to visceral adipose area ratio (kg/cm2) on lumbar bone mineral density (mg/cm2) in premenopausal women using two-piecewise linear regression model.

From: Sex-specific associations between muscle-fat ratio and bone density in middle-aged adults

Lumbar bone mineral density

Adjusted ß (95% CI), p-value

Skeletal muscle mass to visceral adipose area ratio

 

Fitting by standard linear model

44.6 (-11.6, 100.8), 0.120

Fitting by two-piecewise linear model

 

Inflection point

0.31 (kg/cm2)

< 0.31 (kg/cm2)

360.48 (206.18, 514.78) < 0.001

> 0.31 (kg/cm2)

-47.05 (-116.66, 22.55) 0.186

Log likelihood ratio

< 0.001

  1. Age, race, educational level, marital status, sedentary behavior, history of hypertension, history of diabetes, body mass index, total protein, blood urea nitrogen, serum calcium, serum glucose, triglycerides and total cholesterol were adjusted.
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