Table 1.

The demographic characteristics of healthy controls and people with angina.

	Healthy controls		People with angina
	Mean	S.D.	Mean	S.D.
Age	67.83	8.04	67.84	12.11
Income (monthly)	1233.89	1408.77	1059.56	839.12
	N	%	N	%
Sex
Male	4,883	55.36	603	55.78
Female	3,938	44.64	478	44.22
Education
Below college	7,242	82.10	937	86.68
College	1,579	17.90	144	13.32
Marital status
Single	3,053	34.61	459	42.46
Married	5,768	65.39	622	57.54
Residence
Urban	6,252	70.88	813	75.21
Rural	2,569	29.12	268	24.79