Table I.

Characteristics of included studies.

First author	Year	Country	Setting	n	Mean age	Dysmenorrhea (%)	Chronic pelvic pain (%)	Dyspareunia (%)	Bowel symptoms (%)	Urinary symptoms (%)	Infertility (%)	Index test(s)	Observers	Reference standard	Cases with USL/RVS/ vaginal DE
Alborzi	2018	Iran	Multicentre	317	31	–	–	–	–	–		TVS, RES and MRI	Single	Surgery and histolopathology	151/44/–
Bazot	2013	France	Single centre	23	34	–	–	–	–	–	–	MRI and 3D MRI	Two	Surgery and histolopathology	17/–/–
Fiaschetti	2011	Italy	Single centre	58	34	86	60	67	45	–	27	TVS and MRI with/ without gel	Single	Surgery	21/16/11
Holland	2013	England	Multicentre	198	35	72.2	49.5	45.9	9.6	–	–	TVS	Two	Surgery	40/32/–
Hudelist	2011	Austria	Multicentre	129	32.2	86	34.8	55.8	30.2	4.6	15.5	TVS	Single	Surgery and histolopathology	30/9/11
Manganaro	2013	Italy	Single centre	42	28	–	–	–	–	–	–	3D MRI	Single	Surgery and histolopathology	19/–/–
Menakaya	2016	Australia	Multicentre	200	32.1	58.5	61	57.5	41.5	–	38	SVG	Three	Surgery and histopathology	17/9/10
Pascual	2010	Spain	Single centre	38	35.6	–	100	–	–	–	38	3D TVS	Three	Surgery and histolopathology	–/19/–
Tammaa	2015	Austria	Single centre	65	30.2	95	32	63	15	9	32	TVS	Two	Surgery and histolopathology	17/8/11
Zhang	2019	China	Single centre	118	35.2	–	–	–	–	–	–	TVS	Single	Surgery and histolopathology	85/–/–

Only the first author of each study is given. All studies were prospective and included women with clinical suspicion of uterosacral/torus uterinus, rectovaginal septum or vaginal deep endometriosis (DE). Observers refer to the number of observers involved with each imaging modality.

BP, bowel preparation; RES, transrectal endoscopic sonography; RWC, rectal water contrast; SVG, sonovaginography; TVS, transvaginal ultrasound.