From: Risk of uterine, ovarian and breast cancer following pelvic inflammatory disease: a nationwide population-based retrospective cohort study
Breast cancer group
(N = 356)
Control group
(N = 1424)
OR = 1.12
(95% CI 0.84–1.51)
P = 0.44
PID (%)
69 (19.38)
251 (17.63)