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Table 5 Hazard ratios for high WC-related incidence of hypertension within each BMI category

From: Increasing trends in central obesity among Chinese adults with normal body mass index, 1993–2009

  BMI categories BMI categories
  BMI < 25 kg/m2 BMI ≥ 25 kg/m2 BMI < 23 kg/m2 BMI ≥ 23 kg/m2
  WC < 90/80 cm WC ≥ 90/80 cm WC < 90/80 cm WC ≥ 90/80 cm WC < 90/80 cm WC ≥ 90/80 cm WC < 90/80 cm WC ≥ 90/80 cm
Unadjusted model (HR, 95% CI) 1 1.8 (1.6-2.0) 1 1.1 (0.9-1.4) 1 1.6 (1.3-2.0) 1 1.5 (1.3-1.8)
Adjusted model 1* (HR, 95% CI) 1 1.4 (1.2-1.6) 1 1.0 (0.7-1.4) 1 1.2 (1.0-1.6) 1 1.3 (1.1-1.6)
Adjusted model 2 (HR, 95% CI) 1 1.3 (1.1-1.5) 1 1.0 (0.7-1.3) 1 1.2 (1.0-1.4) 1 1.2 (1.0-1.5)
  1. *Adjusted model 1 was adjusted for sex, age, degree of urbanization, education, smoking status, alcohol consumption.
  2. Adjusted model 2 was adjusted for all the variables in model 2 plus systolic blood pressure and diastolic blood pressure.
  3. BMI, body mass index; WC, waist circumference, HR, hazard ratio, CI, confidence interval.