Table 1. Hypertension prevalence and health care among Chinese adults from 2011 to 2015, by place of residence.

	2011				2013				2015
	N	Unweighted	Weighted	P value	N	Unweighted	Weighted	P value	N	Unweighted	Weighted	P value
Sample size	13,725	—	—		10,893	—	—		11,675	—	—
Prevalence
Urban	1,070	45.6	46.3	0.012	911	48.9	50.1	0.009	828	45.8	45.0	0.053
Rural	3,122	36.1	36.9		2,889	41.0	41.0		3,104	40.5	40.2
Rural-to-urban	1,093	40.0	43.1		866	43.5	40.4		942	42.8	42.5
All	5,285	38.5	40.8		4,666	42.8	43.3		4,874	41.8	41.8
Undiagnosed
Urban	354	33.1	35.3	0.005	306	33.6	35.9	0.216	205	24.8	23.8	<0.001
Rural	1,439	46.1	46.2		1,133	39.2	39.9		1,036	33.4	34.1
Rural-to-urban	516	47.2	50.7		351	40.5	46.5		317	33.7	35.3
All	2,309	43.7	44.1		1,790	38.4	40.0		1,558	32.0	31.7
Untreated
Urban	411	38.4	42.0	0.003	375	41.2	42.4	0.114	264	31.9	29.9	<0.001
Rural	1,685	54.0	53.6		1,382	47.8	48.0		1,239	39.9	40.6
Rural-to-urban	610	55.8	59.2		424	49.0	53.8		391	41.5	41.7
All	2,706	51.2	51.6		2,181	46.7	47.4		1,894	38.9	38.0
Uncontrolled	1				1				1
Urban	773	72.2	75.6	0.003	685	75.2	77.0	0.504	537	64.9	63.6	<0.001
Rural	2,529	81.0	80.6		2,234	77.3	77.0		2,299	74.1	73.8
Rural-to-urban	911	83.4	86.7		683	78.9	81.1		712	75.6	75.1
All	4,213	79.7	80.7		3,602	77.2	77.8		3,548	72.8	71.4