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Table 2 Medical history and clinical characteristics of cases and controls

From: Risk factors for the development of tubo-ovarian abscesses in women with ovarian endometriosis: a retrospective matched case–control study

  Cases (n = 44) Controls (n = 132) p value
Previous pelvic inflammatory disease, n (%) 3 (6.8%) 2 (1.5%) 0.100
Ectopic pregnancy, n (%) 2 (4.5%) 1 (0.8%) 0.155
Previous removal of ovarian endometriosis cysts, n (%) 7 (15.9%) 9 (6.8%) 0.130
Previous appendectomy, n (%) 3 (6.8%) 4 (3.0%) 0.504
Caesarean, n (%) 14 (31.8%) 34 (25.8%) 0.434
In vitro fertilization, n (%) 3 (6.8%) 1 (0.8%) 0.049
Uterine cavity surgery within 15 days, n (%) 3 (6.8%) 2 (1.5%) 0.100
Intrauterine device, n (%) 14 (31.8%) 23 (17.4%) 0.042
Lower genital tract infection, n (%) 14 (31.8%) 4 (3.0%) 0.000
Spontaneous rupture of ovarian endometriosis cysts, n (%) 4 (9.1%) 2 (1.5%) 0.016
Dysmenorrhea, n (%) 19 (43.2%) 55 (41.7%) 0.860
Diabetes mellitus, n (%) 5 (11.4%) 3 (2.3%) 0.037
Hypertension, n (%) 3 (6.8%) 9 (6.8%) 1.000
Smoking, n (%) 3 (6.8%) 5 (3.8%) 0.676
Carbohydrate antigen 125, U/ml 60.35 ± 32.29 53.08 ± 38.98 0.224
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