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Table 4 The result of two-piecewise linear regression model

From: Elevated gamma-glutamyl transferase has a non-linear association with incident non-alcoholic fatty liver disease in the non-obese Chinese population: a secondary retrospective study

Incident NAFLD HR (95% CI) P
Fitting model by standard linear regression 1.010 (1.007–1.012) <0.001
Fitting model by two-piecewise linear regression
 Inflection point of GGT
  ≤26 U/L 1.104 (1.089–1.120) <0.001
  > 26 U/L 1.001 (0.999–1.004) 0.3640
  P for log likelihood ratio test <0.001
  1. We adjusted age, gender, BMI, SBP, DBP, TC, TG, HDL-C, LDL-C, ALT, AST, ALP, ALB, GLB, TB, DBIL, BUN, Cr, UA, FBG
  2. CI Confidence interval, HR hazard ratio, NAFLD non-alcoholic fatty liver disease, GGT γ-glutamyl transpeptidase