Table 1

Age and sex standardised and age-specific prevalence of hypertension: survey 1 and survey 2

	Rural								Urban
	Survey 1			Survey 2					Survey 1			Survey 2
	n	Prevalence (%)	SE	n	Prevalence (%)	SE	p Value difference	Ratio (95% CI)	n	Prevalence (%)	SE	n	Prevalence (%)	SE	p Value difference	Ratio (95% CI)
Total	2469	11.2	0.01	1914	28.9	1	<0.001	2.6 (2.3 to 2.9)	3041	23	0.01	2026	42.2	1.1	<0.001	1.8 (1.6 to 1.9)
Men	1065	12.2	0.01	981	32.6	1.5	<0.001	2.7 (2.2 to 3.3)	1451	22.3	0.01	924	43.3	1.6	<0.001	1.9 (1.8 to 2.3)
Women	1404	10.2	0.01	933	25.2	1.4	<0.001	2.5 (2.4 to 3.6)	1590	23.8	0.01	1102	41.1	1.4	<0.001	1.7 (1.5 to 2.0)
Men
35–44	441	8.1	0.01	459	27.4	0.02	<0.001	3.4 (2.4 to 4.8)	646	13.4	0.01	434	33.9	0.02	<0.001	2.5 (2.0 to 3.3)
45–54	318	12.2	0.02	315	36.1	0.03	<0.001	3.0 (2.1 to 4.1)	432	21.6	0.02	299	47.9	0.03	<0.001	2.2 (1.8 to 2.8)
55–64	306	21.6	0.02	207	38.6	0.03	<0.001	1.8 (1.4 to 2.4)	373	34.5	0.03	191	42.5	0.02	NS	1.2 (1.0 to 1.6)
Women
35–44	667	4.3	0.01	433	18.7	0.02	<0.001	4.4 (3.1 to 6.9)	723	12.8	0.01	521	27.6	0.02	<0.001	2.2 (1.8 to 2.8)
45–54	438	9.4	0.01	277	28.5	0.03	0.001	3.0 (2.2 to 4.4)	450	25.9	0.02	321	46.9	0.03	<0.001	1.8 (1.5 to 2.2)
55–64	299	23.1	0.02	223	33.3	0.03	0.011	1.4 (1.1 to 1.9)	417	57.6	0.04	260	59.8	0.03	NS	1.0 (0.99 to 1.6)

Ratio, survey 2/survey 1.
n, sample size; NS, not statistically significant.