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Table 4 Odds ratio of history of pelvic inflammatory disease on breast cancer

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)
  1. OR odds ratio, CI confidence interval, PID pelvic inflammatory disease