Table 1.

General characteristics of the study population

Variables	n	%
Sex
Male	4480	51.13
Female	4283	48.87
Age
Younger	3603	55.77
Older	2858	44.23
Education
College or higher	592	6.75
Secondary	1129	12.88
Primary	1634	18.64
No education, preschool	5409	61.72
Occupation
Manual	2142	24.89
Non-manual	6464	75.11
Wealth index
Poorest	1696	19.36
Poorer	1671	19.06
Middle	1692	19.31
Richer	1784	20.35
Richest	1921	21.92
Place of residence
Rural	6623	75.58
Urban	2140	24.42