Prevalence of Primary Hypertension and Risk Factors in Grade XII Learners in KwaZulu-Natal, South Africa

Table 2

Stratification of hypertension by body mass index, sex, and race.

		Normotensive	Prehypertensive				Hypertensive
		n (%)	n (%)	OR	95% CI	p value	n (%)	OR	95% CI	p value
Black African^1	BMI	275 (57.8)	144 (30.3)				57 (12.0)
	Normal	224 (64.7)	90 (26.0)				32 (9.3)
	Overweight	35 (52.2)	24 (35.8)	1.7	1.0-3.0	0.07	8 (11.9)	1.6	0.7-3.7	0.3
	Obese	16 (25.4)	30 (47.6)	4.7	2.4-9.0	<0.001	17 (27.0)	7.4	3.4-16.2	<0.001
Males	BMI	97 (47.6)	73 (35.8)				34 (16.7)
	Normal	81 (51.9)	56 (35.9)				19 (12.2)
	Overweight	10 (35.7)	11 (39.3)	1.6	0.6-4.0	0.3	7 (25.0)	3.0	1.0-8.9	0.049
	Obese	6 (30.0)	6 (60.0)	1.4	0.4-4.7	0.5	8 (40.0)	5.7	1.8-18.3	0.004
Females	BMI	222 (61.7)	95 (26.4)				43 (11.9)
	Normal	175 (72.0)	49 (20.2)				19 (7.8)
	Overweight	33 (53.2)	21 (33.9)	2.3	1.2-4.3	0	8 (12.9)	2.2	0.9-5.5	0.02
	Obese	14 (25.5)	25 (45.5)	6.4	3.1-13.2	<0.001	16 (29.1)	10.5	4.5-24.9	<0.001

OR: odds ratio.
CI: confidence interval.
¹Other racial groups not included because of the small sample size.