Table 9 Saturation effect analysis of TyG-WHtR on total BMD.

From: Association between triglyceride glucose index and total bone mineral density: a cross-sectional study from NHANES 2011–2018

Total BMD

β (95% CI)

P value

TyG-WHtR

Model I

0.0116 (0.0076, 0.0156)

 < 0.0001

Model II

  

Inflection point (K)

4.065

 

< K point effect 1

0.0408 (0.0291, 0.0524)

 < 0.0001

> K point effect 2

0.0062 (0.0017, 0.0106)

0.0065

Effect 2 minus effect1

− 0.0346 (− 0.0476, − 0.0216)

 < 0.0001

Predicted value of the equation at the folding point

1.1169 (1.1117, 1.1221)

 

Log-likelihood ratio test

 

 < 0.0001

  1. Age, gender, race, education level, family PIR, ALP, BUN, CPK, creatinine, phosphorus, total calcium, uric acid, total bilirubin, glycohemoglobin, total cholesterol, HDL-C, LDL-C and 25OHD2 + 25OHD3 were adjusted.
  2. Model I, univariate linear regression; Model II, two-piecewise regression model.
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