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Table 6 Results of two-piecewise Cox hazard proportional regression models

From: Sex differences in the relationship between body mass index in Chinese adolescents and future risk of hypertension: a decade-long cohort study

Hypertension:

Male (HR,95%CI, P)

Female (HR,95%CI, P)

All participants (HR,95%CI, P)

Fitting model by two-piecewise Cox hazard proportional regression models

  

Inflection points of BMI (kg/m2)

28.196

24.113

27.257

 ≤ Inflection point

1.238 (1.043, 1.470) 0.015

0.714 (0.314, 1.621) 0.420

1.229 (1.042, 1.450) 0.014

 > Inflection point

1.078 (0.849, 1.368) 0.536

4.491 (1.185, 17.020) 0.027

1.149 (0.944, 1.398) 0.166

P for log-likelihood ratio test

0.269

0.003

0.521

  1. Adjusted sex, age, LDL-c, TG, HDL-c, FPG, WC, and UA. In the gender subgroup, Models1 and II were not adjusted for the variable gender
  2. HR, hazard ratio; Ref: reference; CI: confidence