Predictive Role of Neutrophil to Lymphocyte Ratio in Adnexal Torsion: A Systematic Review and Meta-Analysis

Table 1

General characteristics of included studies.

First author	Year	Country	Design	Ethnicity	NLR cut-off	SEN	SP	AT group		Control group
									NLR		NLR
Ercan [1]	2015	Turkey	Retrospective	Caucasian	3.0	89%	100%	27		30
Koleli [5]	2015	Turkey	Retrospective	Caucasian	_	_	_	51		50
Yilmaz [15]	2015	Turkey	Retrospective	Caucasian	2.44	71%	71%	44		92
Tayyar [13]	2017	Turkey	Retrospective	Caucasian	2.9	73%	79%	72		77
Wang [14]	2017	China	Retrospective	East Asian	3.56	62%	95%	68		120
Eric [4]	2018	Turkey	Retrospective	Caucasian	2.77	90%	88%	20		40
Lee, JY [7]	2018	South Korea	Retrospective	East Asian	3.35	63%	86%	24		360
Soysal [12]	2018	Turkey	Retrospective	Caucasian	_	_	_	35		25
Lee, S [8]	2019	South Korea	Retrospective	East Asian	_	_	_	29		41
Rottenstreich [11]	2020	Turkey	Retrospective	Caucasian	_	_	_	143		65
Kaplanoglu [3]	2021	Turkey	Retrospective	Caucasian	2.45	82%	82%	28		29
Kinay [2]	2021	Turkey	Retrospective	Caucasian	2.45	72%	78%	67		134
Lee, J [6]	2021	South Korea	Retrospective	East Asian	2.80	89%	65%	37		95
Meller [9]	2021	Israel	Retrospective	Caucasian	_	_	_	445		170
Oksuzoglu [10]	2021	Turkey	Retrospective	Caucasian	2.68	88%	68%	66		132

: number; NLR: neutrophil to lymphocyte ratio; NOS: the Newcastle-Ottawa Quality Assessment Scale; AT: adnexal torsion; SEN: sensitivity; SP: specificity.