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Table 1 Characteristics of the studies included in final phase

From: Association of T. gondii infection with suicide: a systematic review and meta-analysis

Author Country age Male Female Design Sample size Number of Suicide Case Positive Cases Number of Control group Positive controls Conclusion Quality score (out of 8) Reference
Arling (2009) United states 40±10 90 149 Case-control 234 81 11 153 17 Positive association 8 [18]
Yagmur F (2010) Turkey 24.3±7.6 82 318 Case-control 400 200 82 200 56 Positive association 7 [31]
Okusaga (2014) Germany 38.6±11.1 600 350 Case-control 950 351 146 599 226 No association 8 [19]
Pedersen, M. G (2012) Denmark Pregnancy ages 45,788 prospective cohort study 45,788 N/A N/A N/A N/A Positive association 6 [29]
Alvarado-Esquivel, C (2013) Mexico All ages 88 195 Case-control 283 156 7 127 10 Negative association 7 [22]
Samojlowicz, D (2013) Poland 19 to 86 years 115 12 Case-control 127 41 26 86 42 No association 6 [30]
Coryell W (2016) United states 17.5 ± 1.7 30 78 Case-control 108 17 2 91 2 No association 7 [19]
Gale, S. D (2016) United states 20 to 80 years 2469 3018 Cross-Sectional 5487 NA NA NA NA No association 7 [27]
Okusaga, O (2016) United states 40±11.5 518 307 Case-control 825 308 127 517 200 No association 8 [18]
Sugden, K (2016) United states 3 to 38 years 423 414 prospective cohort study 837 16 8 821 228 No association 8 [20]
Ansari-Lari, M (2017) Iran 40±10 72 27 Case-control 99 29 8 70 34 No association 7 [5]
Dickerson, F (2017) United states 38.6±13 88 74 Case-control 162 N/A N/A N/A N/A Positive association 8 [25]
Bak, J (2018) South Korea 43.75 ± 16.75 141 149 Case-control 290 155 21 135 8 Positive association 7 [23]
Dickerson, F (2018) United states 36±12 647 645 prospective cohort study 1292 N/A NA N/A NA Positive association 8 [24]
Fond, G (2018) France 32±8.6 184 66 prospective cohort study 250 9 7 241 177 No association 8 [26]
Ling, Vinita Eurepe 0–75+ Ecologcal study Positive association 7 [32]
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