Table 4.

History of a chronic condition among 4454 participants in China's New Cooperative Medical Scheme, interviewed in 2009, by age-group

History of a chronic conditiona	Age (years)						X2 test/ Fisher's exact test	p-value
	18–34	35–44	45–54	55–64	65–74	≥75
Hypertension							171.137	0.000
Yes	5	46	101	109	54	7
No	785	1222	1056	777	240	43
Data missing	0	2	2	4	0	1
Diabetes							25.706	0.000
Yes	2	6	17	16	9	0
No	788	1263	1140	872	284	50
Data missing	0	1	2	2	1	1
Asthma							64.050	0.000
Yes	0	2	6	12	10	3
No	788	1268	1152	878	284	47
Data missing	2	0	1	0	0	1

^a History of chronic condition: ascertained the question ‘Has a doctor ever told you that you have hypertension, diabetes, or asthma?’.