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. 2020 Jun 24;3:88. doi: 10.1038/s41746-020-0292-9

Table 3.

WERF survey statistics for participants’ medical history (N = 533).

WERF survey statistics for participants’ medical history
WERF Survey question N (%)
Menstrual and endometriosis history
 Age at menarchy: Mean (s.d.) 12.13 (1.6)
 Were your periods in the last 3 months hormone-induced? 165 (31.0%)
 Were your periods in the the last 3 months regular? 239 (44.8%)
 How many days of bleeding did you usually have for each period in the last 3 months (Not counting discharge/spotting for which you needed a panty liner only)? Mean (s.d.) 6.24 (3.6)
 At what age did you start having pain with your period? Mean (s.d.) 14.63 (4.7)
 How old were you when you first had symptoms? Mean (s.d.) 17.79 (6.9)
 How many doctors did you see before receiving a diagnosis of endometriosis? Mean (s.d.) 5.03 (4.6)
 How many surgical procedures have you had for endometriosis or pelvic pain? Mean (s.d.) 1.70 (1.6)
 Have you ever had surgery to look for endometriosis and none was found? 45 (8.6%)
 Family history of endometriosis 202 (37.9%)
 Mother 92 (17.3%)
 Daughter 1 (0.2%)
 Sister 32 (6.0%)
 Maternal Grandmother, aunt, and/or cousin 86 (16.1%)
 Paternal Grandmother, aunt, and/or cousin 63 (11.8%)
 Family history of chronic pelvic pain 240 (45.0%)
 Mother 136 (25.5%)
 Daughter 4 (0.8%)
 Sister 61 (11.4%)
 Maternal Grandmother, aunt, and/or cousin 107 (20.1%)
 Paternal Grandmother, aunt, and/or cousin 73 (13.7%)
Surgical history
 Appendectomy 89 (16.7%)
 Hysterectomy 22 (4.1%)
 Oophorectomy 22 (4.1%)
 Cervical surgery (LEEP or conization) 21 (3.9%)
 Hysteroscopy 71 (13.3%)
 Gallbladder surgery 35 (6.6%)
 Hernia operation 21 (3.9%)
 Sigmoidoscopy/colonoscopy 118 (22.1%)
 Laparoscopy count 1.41 (1.3)
 Some abdominal surgery 417 (78.2%)

Note that not all Phendo participants completed the WERF survey.