Table 6 The result of the two-piecewise Cox proportional hazards regression model.

From: Non-linear relationship between pulse pressure and the risk of prediabetes: a 5-year cohort study in Chinese adults

Outcome: prediabetes

HR, 95%CI P

Value

Fitting model by standard Cox regression

1.15 (1.11, 1.18)

< 0.0001

Fitting model by two-piecewise Cox regression

 Inflection points of PP (10 mmHg)

40

40

 < 40 mmHg

1.01 (0.89, 1.15)

0.8916

 ≥ 40 mmHg

1.17 (1.13, 1.22)

< 0.0001

P for log-likelihood ratio test

 

0.047

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