Table 3. Quality assessment of included studies.

Author, year	Patient selection			Index test			Reference standard				Flow and timing
	Was a consecutive or random sample of patients enrolled	Was a case control design avoided? Did the study avoid inappropriate exclusions?		Were the index test results interpreted without knowledge of the results of the reference standard?	If a threshold was used, was it prespecified?		Reference standard	Is the reference standard likely to correctly classify the target condition?	Were the reference standard results interpreted without knowledge of the results of the index test?		Was there an appropriate interval between the index test and reference standard?	Did all patients receive the same reference standard?	Were all patients included in the analysis?
Baiocchi 2016	Y	Y		N	NR		A systematic pelvic ± para-aortic lymphadenectomy	Y	N		NR	Y	Y
Ehrisman 2017	Y	Y		N	NR		complete pelvic lymphadenectomy, total hysterectomy and bilateral salpingo-oophorectomy	N	N		NR	Y	Y
Naoura 2015	Y	Y		N	NR		Systematic bilateral pelvic lymphadenectomy +/− para-aortic lymphadenectomy	N	N		NR	Y	Y
Paley 2016	Y	Y		N	NR		Bilateral pelvic and periaortic LAN	Y	N		NR	Y	Y
Papadia 2018	Y	Y		N	NR		Full pelvic and para-aortic lymphadenectomy up to the renal vessels	Y	N		NR	Y	Y
Rajanbabu 2018	Y	Y		N	NR		Bilateral pelvic and paraaortic LND where SLN’s were not detected	Y	N		NR	Y	Y
Ruiz 2018	Y	Y		N	NR		Pelvic and para-aortic lymphadenectomy ± omentectomy ± appendectomy	Y	N		NR	Y	Y
Soliman 2017	Y	Y		N	NR		Full pelvic and para-aortic lymphadenectomy up to the renal vessels	Y	N		NR	Y	Y
Togami 2018	Y	Y		N	NR		Pelvic lymphadenectomy with or without para-aortic lymphadenectomy	Y	N		NR	Y	Y
Touhami 2017	Y	Y		N	NR		Complete pelvic lymphadenectomy ± para-aortic lymphadenectomy	Y	N		NR	Y	Y
Wang 2019	Y	Y		N	NR		Pelvic with or without paraaortic PAD or omentum resection	Y	N		NR	Y	Y
Ye 2019	Y	Y		N	NR		Complete bilateral lymphadenectomy ± paraaortic lymphadenectomy to the inferior mesenteric artery ± omentectomy	Y	N		NR	Y	Y