Table 8 Saturation effect analysis of TyG-BMI 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-BMI

Model I

0.0004 (0.0003, 0.0004)

 < 0.0001

Model II

  

Inflection point (K 1)

193.9265

 

< K point effect 1

0.0013 (0.0011, 0.0015)

 < 0.0001

> K point effect 2

0.0002 (0.0002, 0.0003)

 < 0.0001

Effect 2 minus effect1

− 0.0011 (− 0.0013, − 0.0009)

 < 0.0001

Predicted value of the equation at the folding point

1.1222 (1.1174, 1.1270)

 

Log-likelihood ratio test

 

 < 0.0001

Inflection point (K 2)

314.177

 

< K point effect 1

0.0004 (0.0003, 0.0006)

 < 0.0001

> K point effect 2

0.0000 (− 0.0001, 0.0002)

0.6523

Effect 2 minus effect1

− 0.0004 (− 0.0007, − 0.0001)

0.0025

Predicted value of the equation at the folding point

1.1386 (1.1294, 1.1479)

 

Log-likelihood ratio test

 

0.0020

  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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