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. Author manuscript; available in PMC: 2017 Oct 1.
Published in final edited form as: Arch Suicide Res. 2016 Apr 4;20(4):605–613. doi: 10.1080/13811118.2016.1158677

Table 1.

Case-Control Studies of Toxoplasmosis Titers in Suicide Attempters

Suicide Attempters Controls
Alvarado-Esquivel et al. 201317
 n 156 127
 diagnosis mixed mixed
 mean ± SD IgG N/A N/A
 # (%) positive titer1 7 (4.5) 10 (7.9)
Arling et al. 200912
 n 81 158
 diagnosis mood disorder mood disorder & healthy
 geometric mean (CI) IgG2 0.48 (0.40, 0.57) 0.33 (0.28, 0.39)
 # (%) positive titer 11 (13.6) 17 (10.8)
Okusaga et al. 201118
 n 351 599
 diagnosis schizophrenia schizophrenia
 mean ± SD IgG3 N/A N/A
 # (%) seropositive3 146 (41.6) 226 (37.7)
Yagmur et al. 201019
 n 200 200
 diagnosis mixed healthy
 mean ± SD IgG N/A N/A
 # (%) seropositive4 82 (41.0) 56 (28.0)
Zhang et al. 201220
 n 54 30
 diagnosis mixed healthy
 mean ± SD IgG5 N/A N/A
 # (%) seropositive6 22 (40.7) 6 (20.0)
1

properties with IgG ≥ 150 IU/ml significantly diff., p=0.04

2

p=0.004

3

among subjects < median age of 38, significant differences for titers, p = 0.006 and, seroprevalence, p=0.01

4

p= 0.004

5

p=0.04, adjusted for age

6

p=0.008