Table 3.

HRs (95% CI) of hypertension according to BMI in study participants (exclusion of high predicted FM)

BMI category	Events, n	Incidence rate, %	HR (95% CI)
			model 1*	model 2#	model 3&	model 4Ψ	model 5ζ
<18.5 kg/m2	6	2.5	0.64 (0.28–1.49)	0.62 (0.27–1.45)	0.63 (0.27–1.47)	0.63 (0.27–1.50)	0.62 (0.27–1.44)
18.5–21.4 kg/m2	56	4.5	1.00 (reference)	1.00 (reference)	1.00 (reference)	1.00 (reference)	1.00 (reference)
21.5–23.9 kg/m2	82	6.3	1.37 (0.97–1.92)	1.22 (0.87–1.72)	1.22 (0.87–1.72)	1.22 (0.87–1.72)	1.20 (0.85–1.69)
24.0–25.9 kg/m2	78	8.9	1.86 (1.32–2.63)	1.73 (1.22–2.44)	1.72 (1.21–2.44)	1.71 (1.20–2.42)	1.72 (1.20–2.46)
26.0–27.9 kg/m2	50	11.0	2.27 (1.55–3.33)	2.23 (1.51–3.28)	2.21 (1.50–3.27)	2.36 (1.59–3.49)	2.46 (1.55–3.92)
≥28 kg/m2	34	13.4	3.11 (2.03–4.76)	2.45 (1.59–3.78)	2.14 (1.28–3.58)	3.07 (1.70–5.56)	0.00 (0.00 to ∞)
p for trend			<0.001	<0.001	<0.001	<0.001	<0.001

BMI, body mass index; FM, fat mass; HR, hazard ratio; CI, confidence interval.

^*Unadjusted.

^#Adjusted for age, ethnicity (Han or non-Han), fasting blood glucose, dietary variety score, smokers (yes or no), drinkers (yes or no), physical activity (insufficient or sufficient), family history of cardiovascular disease (yes or no), family history of cancer (yes or no).

^&Based on model 2, additionally exclude participants with predicted fat mass above 97.5th centiles.

^ΨBased on model 2, additionally exclude participants with predicted fat mass above 95th centiles.

^ζBased on model 2, additionally exclude participants with predicted fat mass above 90th centiles.