Table 4 Odds ratios of hypertension by categories of BMI at 25 years of age (N=14 635)

From: Relations of body weight status in early adulthood and weight changes until middle age with hypertension in the Chinese population

  

OR (95% CI)

BMI category

No. of cases (%)

Model 1 a

Model 2 b

Model 3 c

Chinese criterion

 <18.5

250 (18.0)

0.80 (0.69–0.93)

0.76 (0.66–0.89)

0.53 (0.46–0.63)

 18.5–23.9

2558 (23.4)

1.00 (reference)

1.00 (reference)

1.00 (reference)

 24–27.9

653 (30.3)

1.38 (1.24–1.54)

1.42 (1.27–1.58)

2.06 (1.83–2.31)

 ⩾28

64 (46.0)

2.63 (1.86–3.74)

2.5 (1.75–3.57)

4.97 (3.43–7.21)

 P for trendd

 

<0.001

<0.001

<0.001

WHO criterion

 <18.5

250 (18.0)

0.79 (0.69–0.92)

0.75 (0.65–0.88)

0.52 (0.44–0.61)

 18.5–24.9

2838 (23.6)

1.00 (reference)

1.00 (reference)

1.00 (reference)

 25–29.9

424 (35.3)

1.71 (1.50–1.94)

1.73 (1.51–1.98)

2.66 (2.31–3.07)

 ⩾30

13 (44.8)

2.72 (1.27–5.84)

2.62 (1.21–5.66)

5.75 (2.61–12.66)

 P for trendd

 

<0.001

<0.001

<0.001

  1. Abbreviations: BMI, body mass index; CI, confidence interval; OR, odds ratio; WHO, World Health Organization.
  2. aModel 1 adjusted for age and sex.
  3. bModel 2 additionally adjusted for urbanization (urban or rural), education level (primary school or below, junior high school, high school or equivalent or at least some college), smoking status (current smoker or not), drinking status (current drinker or not) and family history of hypertension.
  4. cModel 3 additionally adjusted for weight change between the age of 25 and the study baseline (1998) as a continuous variable.
  5. dTrend of linearity over BMI categories was tested by modeling the median values of BMI of each category as a continuous variable in logistic regression model.
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