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Table 5 Threshold effect analysis of HbA1c and obesity in T2DM

From: Visceral fat area and body fat percentage measured by bioelectrical impedance analysis correlate with glycometabolism

Outcome

VFA (cm2)

BFP(%)

WC (cm)

BMI (kg/m2)

Fitting by standard linear model

0.220 (−0.813, 1.253) 0.676

0.062 (−0.103, 0.226) 0.462

− 0.218 (− 0.504, 0.067) 0.134

−0.075 (− 0.173, 0.022) 0.128

Fitting by two-piecewise linear model

Inflection point

7

6.7

7

7

<Inflection point

7.471 (3.565, 11.377) < 0.001

1.799 (0.998, 2.601) < 0.001

2.238 (1.160, 3.316) < 0.001

0.810 (0.443, 1.176) < 0.001

> Inflection point

−1.292 (−2.586, 0.003) 0.051

−0.146 (− 0.335, 0.043) 0.129

−0.730 (− 1.088, − 0.373) < 0.001

−0.260 (− 0.381, − 0.139) < 0.001

Log-likelihood ratio

< 0.001

< 0.001

< 0.001

< 0.001

  1. Age, sex, HBP, TG, TC, LDL-c, HDL-c and SUA were adjusted. SUA Serum uric acid, HbA1c Glycosylated hemoglobin, FBG Fasting blood glucose, HBP High blood pressure, HDL-c High density lipoprotein cholesterol, LDL-c Low density lipoprotein cholesterol, TC Total cholesterol, TG Triglyceride, BMI Body mass index, VFA Visceral fat area, BFP Body fat percentage, WC Waist circumference