Table 2.

Demographics of the study participants

Variable	n	%
Age
>50 years	2,577	42.11
41-50 years	1,358	22.19
31-40 years	1,003	16.39
21-30 years	833	13.60
<20 years	348	5.69
Sex
Male	3,424	55.96
Female	2,695	44.04
Education
Illiterate	951	15.54
School level	3,038	49.65
Graduate level	2,130	34.81
Centre
RZC1 (Chennai)	928	15.17
OZS2 (Salem)	1,168	19.09
OZC3 (Coimbatore)	942	15.39
GZP4 (Pondicherry)	1,519	24.82
GZT5 (Tirunelveli)	1,562	25.53