Table 1. Description of the studies included looking for an association between toxoplasmosis and obsessive compulsive disorder.

No	First author	Publication year	Place of study	Type of study	Method	Test	Results	Age (years ± SD)	Sex (N)
1	Alvarado-Esquivel C [28]	2006	Mexico	Case control	ELISA	IgG IgM	Not significant	P: ≥16 C: 16–54	P: (-) C: (F:55, M:125)
2	Miman O [14]	2010	Turkey	Case control	ELISA IFA	IgG IgM	Significant	P: 18–70 C: 18–70	P: (F:25, M:17) C: (F:62, M:38)
3	Xiao Y [27]	2010	China	Case control	ELISA	IgG	Not significant	P: 15–65 C: 15–65	P: (-) C: (F:1315,M:1319)
4	Cong W [29]	2015	China	Case control	ELISA	IgG IgM	Not significant	P: 16–91 C: 16–91	P: (-) C: (F:238, M:207)
5	Memik NÇ [16]	2015	Turkey	Case control	ELISA	IgG IgM	Not significant	P: 11.84±3.19 C: 12.97±2.84	P: (F:23, M:19) C: (F:20, M:25)
6	Zaki WM [24]	2016	Saudi Arabia	Case control	ELISA	IgG IgM	Not significant	P: 19–67 C: 17–64	P: (-) C: (F:68, M:94)
7	Flegr J [19]	2016	Czech Republic	Case control	CFT ELISA	IgG IgM	Not significant	P:M: 34.0±10.5 F: 36.5±12.3 C: M: 34.8±12.7 F: 32.4±11.0	P: (F:16, M:7) C: (F:878, M:355)
8	Coccaro EF [20]	2016	USA	Case control	ELISA	IgG	Not significant	P: 31.3±8.7 C: 33.7±8.1	P: (-) C: (F:46, M:64)
9	Flegr and Horáček a [15]	2017	Czech Republic	Cross sectional	CFT ELISA	IgG IgM	Not significant	M: 35.6±12.4 F: 32.9±12.3	P: (F:20, M:6) C: (F:1023, M:283)
10	Flegr and Horáček b [21]	2017	Czech Republic	Cross sectional			Not significant	M: 34.8±12.0 F: 30.5±10.9	P: (F:70, M:71) C: (F:2006, M:1203)
11	Afsharpaiman Sh [26]	2017	Iran	Case control	ELISA EIA	IgG IgM		P: 8.56 ± 2.5 C: 8.42 ± 1.9	P: (F:25, M:23) C: (F:25, M:23)
12	Akaltun I [25]	2018	Turkey	Case control	ELISA	IgG	Significant	P: 15.1 ± 3.9 C: 14.7 ± 2.8	P: (F:35, M:25) C: (F:31, M:29)

ELISA: enzyme-linked immunosorbent assay, IFA: indirect immunofluorescence assay, CFT: complement fixation test, EIA: enzyme immunoassay, IgG: Immunoglobulin G, IgM: Immunoglobulin M, P: Pateint, C: Control, F: Female, M: Male, N: Number