Logistic regression analysis indicated significant association among elderly population in urban areas ( OR 1.713 ; 95 % CI 1.337-2 .195 ) , smoking ( OR 1.779 ; 95 % CI 1.384-2 .288 ) , and individuals without dental insurance ( OR 2.050 ; 95 % CI 1.120-3 .754 ) with dental caries .