Independent risk factors for vulvar HPV were similar to cervix and included : age ( adjusted odds ratio [ aOR ] 0.5 [ 95 % CI , .3 -.9 ] 28 vs 22-23 ] ) ; marital status ( aOR 2.3 [ 95 % CI , 1.5-3 .5 ] single vs married/living-as-married ) ; and number of sexual partners ( aOR 3.6 [ 95 % CI , 1.9-7 .0 ] 6 vs 1 ) .