Cervical screening attendance and cervical cancer risk among women who have sex with women

Abstract

Abstract Objectives To describe cervical cancer screening participation among women who have sex exclusively with women (WSEW) and women who have sex with women and men (WSWM) compared with women who have sex exclusively with men (WSEM), and women who have never had sex, and compare this with bowel (colorectal) and breast screening participation. To explore whether there is evidence of differential stage 3 cervical intraepithelial neoplasia (CIN3) or cervical cancer risk. Methods We describe cervical, bowel and breast cancer screening uptake in age groups eligible for the national screening programmes, prevalent CIN3 and cervical cancer at baseline, and incident CIN3 and cervical cancer at 5 years follow-up, among 218674 women in UK Biobank, a cohort of healthy volunteers from the UK. Results In adjusted analysis, compared with WSEM, WSEW OR(95%CI) 0.10(0.08-0.13), WSWM 0.73(0.58-0.91), and women who have never had sex 0.02(0.01-0.02) were less likely to report ever having attended cervical screening. There were no differences when considering bowel cancer screening uptake (p=0.61). For breast cancer screening, attendance was lower among WSWM 0.79(0.68 to 0.91) and women who have never had sex 0.47(0.29-0.58), compared with WSEM. There were incident and prevalent cases of both CIN3 and cervical cancer among WSEW and WSWM. Compared with WSEM with a single male partner, among WSEW there was a twofold increase in CIN3 1.91(1.01 to 3.59); among WSWM with only one male partner this was 2.25(1.19 to 4.24). Conclusions These findings highlight the importance of improving uptake of cervical screening among all women who have sex with women and breast screening among WSWM and women who have never had sex.