. 2017 Jan-Mar;15(1):105–111. doi: 10.1590/S1679-45082017RW3827

Table 1. Characteristics of the included articles that examined protein tyrosine phosphatase non-receptor 22 (C1858T) associations with endometriosis.

First author	PY	Country	Number of studies	Ethnic group	Study design	Diagnosis of endometriosis	Controls	Matching	NOS
Ammendola et al.⁽¹³⁾	2008	Italy	2	Caucasian	PB	Laparoscopic intervention	163 males and 69 females, both healthy	Not matched	7
Płoski et al.⁽¹⁴⁾	2009	Poland	1	Caucasian	PB	Laparoscopic and histopathological examinations	310 anonymous unrelated adults representative of the population of Central Poland. No information on affliction status regarding endometriosis	Matched by ethnicity	7
Gomes et al.⁽¹⁵⁾	2010	Brazil	1	Multi-ethnic	PB	Laparoscopic and histopathological examinations	180 fertile non-menopausal women without history of endometriosis and/or autoimmune diseases who underwent tubal ligation	Not matched	6
Gloria-Bottini et al.⁽¹⁶⁾	2013	Italy	6	Caucasian	PB	Laparoscopic intervention; histologically confirmed	359 healthy blood donors	Not matched	7

PY: publication year; PB: population-based; NOS: Newcastle-Ottawa Score.