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. 2025 Aug 22;17:349. doi: 10.1186/s13098-025-01907-1

Table 6.

The result of the two-piecewise Cox regression model

Incident diabetes Overall (HR,95%CI, P) Chinese (HR,95%CI, P ) Japanese (HR,95%CI, P )
Fitting the model by standard Cox regression 2.390 (2.047, 2.792) < 0.0001 1.843 (1.540, 2.206) < 0.001 2.420 (1.665, 3.516) < 0.001
Fitting model by two-piecewise Cox regression model
 Inflection point of AIP 0.432 0.436 -0.449
 ≤Inflection point 2.956 (2.408, 3.627) < 0.001 2.180 (1.717, 2.768) < 0.001 0.292 (0.051, 1.657) 0.165
 >Inflection point 0.966 (0.528, 1.766) 0.910 0.951 (0.493, 1.834) 0.880 2.842 (1.915, 4.218) < 0.001
P for log-likelihood ratio test 0.001 0.034 0.027

We adjusted age, gender, BMI, SBP, DBP, FPG, LDL-c, ALT, AST, smoking, and drinking status

HR, Hazard ratios; CI: confidence, Ref: reference; AIP, atherogenic index of plasma