Table 2.

Cohort studies.

Article	Years of Follow up	Setting	Population of Reference	Age	Source of Information	Method of Diagnosis	Incidence
Leibson et al., 2004 [16]	1989–1999	USA	726,205 women-year		Nurses’ Health Study II	Review of clinical reports of self-reported cases	237/100,000 women-year
Gao et al., 2019 [17]	1996–2008	Uppsala, Sweden	4429 identified 3476 with obstetric record 3406 included	Born 1933–1972	Uppsala Birth Cohort Multigenerational Study and a national registry of hospital discharges	Diagnostic codes	1.08 per 1000 women-year
Yasui et al., 2015 [18]	2001–2012	Japan	15,019		Japan Nurses’ Health Study	Questionnaire sent to women that have reported endometriosis: confirmed with image or surgery	6.8% 1025 reported, 862 responded to the questionnaire, 638 diagnoses confirmed Image: 38.3% Surgery: 24.4%
Kvaskoff et al., 2014 [19]	1989	USA	A cohort of 116,430 female US nurses (response rate >90%)	25–42	Nurses’ Health Study II	Self-reported laparoscopically confirmed endometriosis	3.9 per 1000 person-years