Females ( odds ratio -LSB- OR -RSB- = @ ; @ % confidence interval -LSB- CI -RSB- : @-@ @ ) , college graduates ( OR = @ ; @ % CI : @-@ @ ) and those who considered the quality of their healthcare to be poor ( OR = @ ; @ % CI : @-@ @ ) were more likely to use CAM , whereas blacks ( OR = @ ; @ % CI : @-@ @ ) were less likely to use CAM .