Table 2.

The prevalence of hypertension of the ethnic groups according to blood pressure category (n = 675).

BP category (mmHg)	Kinh		Tay		Dao		Others		Total
	n	%	n	%	n	%	n	%	n	%
Optimal	31	31.6	107	22.4	16	28.1	11	25.6	165	24.4
Normal	8	8.2	73	15.3	5	8.8	4	9.3	90	13.3
High normal	14	14.3	70	14.7	10	17.5	7	16.3	101	15.0
HTN	45	45.9	227	47.6	26	45.6	21	48.8	319	47.3
Total	98	100	477	100	57	100	43	100	675	100
ISH (n=319)	6	13.3	86	37.9	5	19.2	4	19.0	101	31.7