Reporting ever having had a mammogram was inversely associated with lack of health insurance ( OR = 0.37 , 95 % CI : 0.16-0 .84 ) , ages under 50 years ( OR = 0.23 , 95 % CI : 0.12-0 .45 ) , high cost of exams ( OR = 0.48 , 95 % CI : 0.27-0 .87 ) , and lack of mammography knowledge ( OR = 0.16 , 95 % CI : 0.07-0 .37 ) , while increasing education levels were positively associated ( OR = 1.72 , 95 % CI : 1.09-2 .70 ) .
