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Onset of symptoms
Retrospective Study:
Registry of Endometriosis Association (n = 4,000)
38% symptoms before age 20 21% symptoms before age 15
Ballweg ML, J Pediatric Adolesc Gynecol, 2003
Prevalence
75% (237/314) 70% (102/146)
49% (204/420)
in girls with CPP resistant to treatment in girls with dysmenorrhea
in girls with CPP that is not necessarily resistant to treatment.
Overall 62% (543/880; range 25–100%)
Janssen EB et al., HRU, 2013
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