Table 2. Description of data extracted of the included studies in the systematic review and meta-analysis of the association between toxoplasmosis and obsessive compulsive disorder.

No	Reference	N	Case: OCD+ (n)	Control: OCD- (n)	OCD+ & T+ (n, %)	OCD- & T+ (n, %)	OR (95% CI)	P-value
1	Alvarado-Esquivel C [28]	181	1	180	0 (0%)	16 (8.9%)	3.32 (0.13–84.89)	0.91
2	Miman O [14]	142	42	100	20(47.62%)	19 (19%)	3.88 (1.77–8.50)	<0.01
3	Xiao Y [27]	2646	12	2634	3 (25%)	329 (12.5%)	2.34 (0.63–8.67)
4	Cong W [29]	474	29	445	7 (24.14)	55 (12.36%)	2.26 (0.92–5.53)	0·068
5	Memik NÇ [16]	87	42	45	2 (4.8%)	4 (8.9%)	0.51 (0.09–2.96)	0.677
6	Zaki WM [24]	170	8	162	2 (25%)	24 (14.8%)	1.92 (0.37–10.06)	0.582
7	Flegr J [19]	1256	23	1233	3 (13.04%)	290 (23.52%)	0.49 (0.14–1.65)	0·126
8	Coccaro EF [20]	115	5	110	1 (20%)	10 (9.1%)	2.50 (0.25–24.58)	0.778
9	Flegr and Horáček a [15]	1332	26	1306	11 (42.31%)	355 (27.18%)	1.96 (0.89–4.32)	0.047
10	Flegr and Horáček b [21]	3350	141	3209	31 (22%)	516 (16.07%)	1.47 (0.98–2.22)	0.014
11	Afsharpaiman Sh [26]			48	1(2.08)	1(2.08)
12	Akaltun I [25]	120	60	60	21 (35%)	6 (10%)	4.85 (1.79–13.13)	0.001

N and n: Number, CI: Confidence interval; OCD⁺: Individuals with obsessive compulsive disorder; OCD^-: Individuals without obsessive compulsive disorder; OCD⁺ & T⁺: Individuals with obsessive compulsive disorder and Toxoplasma positive; OCD^- & T⁺: Individuals without obsessive compulsive disorder and Toxoplasma positive; OR: Odds ratio