Table 1.

Demographics and social economics of all subjects enrolled in the study

Variables		Hypertension	Stroke	CHD	Total	Statistics
Family member aged 60 years or above	Yes	638	91	117	846	χ2 = 22.97, P < 0.001
	No	361	21	33	415
Family status	General	924	90	139	1153	χ2 = 18.88, P < 0.001
	Others†	76	22	11	109
Occupation	Farming	562	60	102	724	χ2 = 8.15, P = 0.017
	Non-farming	438	52	48	538
Economic status △	Non-poor	591	62	73	726	χ2 = 6.05, P = 0.049
	Poor	409	50	77	536
Nearest medical centre	Village clinic	462	48	97	607	P = 0.001 (Fisher)
	Township health centre	485	60	47	592
	County hospital	5	1	1	7
	Personal clinic	48	3	5	56
Time spent travelling to the nearest medical centre	Less than 30 min.	858	89	122	1069	P = 0.241 (Fisher)
	30 min. to 60 min.	110	18	23	151
	over 60 min.	32	5	5	42
Age	Less than 60 years	485	23	50	558	χ2 = 40.11, P < 0.001
	60 years and above	515	89	100	704
Gender	Male	368	55	49	472	χ2 = 8.15, P = 0.017
	Female	632	57	101	790
Race	Han	909	105	123	1137	χ2 = 13.42, P = 0.001
	Others‖	91	7	27	125
Educational background	Illiterate	350	51	64	465	χ2 = 7.28, P = 0.026
	Others*	650	61	86	797
Marital status	Married	820	85	112	1017	χ2 = 6.21, P = 0.045
	Others※	180	27	38	245
Medical insurance	Yes	990	112	147	1249	P = 0.230 (Fisher)
	No	10	0	3	13

^†Households enjoying five guarantees (i.e. childless and infirm; old persons who are guaranteed food, clothing, medical care, housing and burial expenses by communes; low-income families).

^△The economic status of households was evaluated by comparing the annual per capita income with the poverty line of RMB1300/$208.1 per capita set by the Chinese State Council Poverty Alleviation Leading Group Office; a poor economic status indicates an annual per capita income below the threshold, and a non-poor economic status indicates an annual per capita income equal to or above the threshold.

^‖Nationality of Hui, Uygur, Dongxiang, Tujia, or Kazak etc. except Han.

^*Elementary, middle or senior middle school.

^※Divorced, widowed or unmarried.