Table 1 The characteristics of included studies
Author | Year | Country | Study design | Study population | Mean age | Sample size | Suicidal ideation | Suicide attempt | NOS score |
|---|---|---|---|---|---|---|---|---|---|
Andreas K | 2021 | European countries | Cross-sectional | TS | 30.7 | 5267 | 1827 | 1797 | 7 |
Yossi Levi-B | 2022 | Israel | Cross-sectional | TS | 55 | 195 | 151 | 77 | 6 |
Shira M | 2009 | USA | Cross-sectional | FTM | 47 | 153 | NR | 9 | 6 |
MTF | 47 | 153 | NR | 12 | |||||
Brandon D. L. M | 2015 | Argentina | Cross-sectional | FTM | 30 | 482 | NR | 18 | 6 |
MTF | 30 | 482 | NR | 141 | |||||
Robin M. M | 2002 | USA | Cross-sectional | TS | 36.88 | 73 | 27 | 17 | 7 |
Azar N | 2021 | Iran | Cross-sectional | MTF | 27.6 | 127 | 91 | 64 | 7 |
Arianne R | 2021 | Brazil | Cross-sectional | MTF | 30 | 763 | 191 | 238 | 7 |
Sari L. R | 2014 | USA | Cross-sectional | TS | 37.3 | 31 | 18 | 9 | 7 |
Katharine A.R | 2019 | UK | Cross-sectional | FTM | 19.7 | 210 | 108 | 46 | 7 |
MTF | 20.2 | 105 | 58 | 24 | |||||
Ankur S | 2021 | California | Cross-sectional | TS | NR | 120 | NR | 17 | 6 |
VTS | NR | 120 | NR | 51 | |||||
Gareth J. T | 2020 | Australia | Cross-sectional | TS | 26 | 392 | 157 | 66 | 6 |
VTS | 26 | 392 | 367 | 209 | |||||
Raymond P.T | 2017 | USA | Cross-sectional | TS | NR | 170 | 62 | NR | 6 |
NR | 170 | 99 | NR | ||||||
41.14 | 36 | 14 | NR | ||||||
41.14 | 36 | 19 | NR | ||||||
Jack L. T | 2020 | USA | Cross-sectional | TS | 23.4 | 3494 | 3129 | 1775 | 8 |
Sahika Y | 2015 | Turkey | Cross-sectional | MTF | NR | 42 | 23 | 13 | 7 |
FTM | NR | 99 | 55 | 29 | |||||
Galit Z | 2018 | Sweden | Cross-sectional | MTF | NR | 149 | 60 | 54 | 8 |
FTM | NR | 187 | 75 | 79 | |||||
TS | NR | 796 | 283 | 251 | |||||
Sav Z | 2021 | Australia | Cross-sectional | TS | 28 | 928 | NR | 394 | 8 |
Ashley A | 2020 | USA | Cross-sectional | TS | NR | 372 | 320 | 208 | 7 |
Greta R. B | 2015 | Canada | Cross-sectional | TS | 32.7 | 380 | 133 | 43 | 7 |
Runsen C | 2019 | China | Cross-sectional | MTF | 23.3 | 687 | 413 | 141 | 7 |
FTM | 23.3 | 622 | 319 | 68 | |||||
Itala Raymundo C | 2021 | Brazil | Cross-sectional | TS | 26.8 | 378 | 256 | 163 | 7 |
Ricardo de M. R. R | 2021 | Brazil | Cross-sectional | MTF | NR | 345 | 163 | 64 | 6 |
Anthony F | 2020 | USA | Cross-sectional | TS | NR | 572 | 85 | 184 | 6 |
VTS | NR | 572 | 40 | 184 | |||||
Peter G | 2012 | USA | Cross-sectional | TS | 37.1 | 290 | NR | 83 | 6 |
Arnold H. G | 2016 | USA | Cross-sectional | TS | 18 | 129 | 52 | 29 | 6 |
Shelley H | 2021 | USA | Cross-sectional | TS | 22.5 | 3471 | 977 | 179 | 6 |
Canada | Cross-sectional | TS | 22.5 | 717 | 196 | 54 | |||
Adam G. H | 2020 | USA | Cross-sectional | MTF | NR | 33 | 10 | 8 | 7 |
FTM | NR | 98 | 45 | 30 | |||||
Sanna S | 2021 | Nepal | Cross-sectional | MTF | NR | 139 | 58 | 26 | 7 |
Yiu T. S | 2017 | Hong Kong | Cross-sectional | TS | NR | 106 | 71 | 22 | 6 |
Seishi T | 2011 | Japan | Cross-sectional | MTF | 32.2 | 188 | 141 | NR | 6 |
FTM | 26.4 | 312 | 219 | NR | |||||
Brian C. T | 2019 | USA | Cross-sectional | TS | NR | 1148 | 974 | 577 | 7 |
Galit Z | 2018 | Sweden | Cross-sectional | MTF | NR | 149 | 60 | 54 | 7 |
FTM | NR | 187 | 75 | 79 | |||||
Sav Z | 2021 | Australia | Cross-sectional | TS | NR | 928 | NR | 399 | 7 |
Rao A | 2019 | Pakistan | Cross-sectional | TS | 39 | 156 | 67 | NR | 6 |
Itala R. C | 2019 | Brazil | Cross-sectional | TS | 26.8 | 378 | 256 | 163 | 6 |
Collier M. C | 1997 | USA | Cross-sectional | MTF | 32 | 318 | 38 | NR | 7 |
FTM | 30 | 117 | 25 | NR | |||||
Rachel L | 2016 | Lebanon | Cross-sectional | TS | 27 | 54 | NR | 25 | 7 |
Aboussouan A | 2019 | USA | Cross-sectional | TS | 49.01 | 154 | NR | 110 | 7 |
TS | 49.01 | 159 | NR | 56 | |||||
TS | 31.11 | 2841 | NR | 1540 | |||||
TS | 31.11 | 1131 | NR | 226 | |||||
TS | 49.01 | 154 | 98 | 21 | |||||
TS | 49.01 | 159 | 43 | 6 | |||||
TS | 31.11 | 2841 | 1936 | 392 | |||||
TS | 31.11 | 1131 | 432 | 40 | |||||
Yockey A | 2020 | USA | Cross-sectional | TS | NR | 790 | 272 | 287 | 7 |
Azeem R | 2019 | Pakistan | Cross-sectional | TS | 39.26 | 156 | 67 | NR | 6 |
Bauer G | 2015 | Canada | Cross-sectional | TS | 32.7 | 380 | NR | 43 | 7 |
Boyer L | 2021 | USA | Cross-sectional | TS | NR | 8112 | NR | 66 | 7 |
Chang R | 2022 | China | Cross-sectional | MTF | 34 | 198 | 73 | NR | 7 |
Chen R | 2019 | China | Cross-sectional | MTF | 22.89 | 687 | 413 | 141 | 7 |
FTM | 23.78 | 622 | 319 | 68 | |||||
TS | 23.31 | 1309 | 732 | 209 | |||||
Chen Y | 2020 | China | Cross-sectional | MTF | 27.9 | 250 | 55 | 64 | 7 |
Chinazzo I | 2021 | Brazil | Cross-sectional | TS | NR | 378 | 256 | 163 | 7 |
Clements-N. K | 2006 | USA | Cross-sectional | MTF | NR | 392 | NR | 127 | 7 |
FTM | NR | 123 | NR | 39 | |||||
Drakeford L | 2018 | USA | Cross-sectional | TS | NR | 6450 | NR | 3394 | 8 |
Duffy M | 2018 | USA | Cross-sectional | TS | NR | 122 | 92 | 91 | 7 |
TS | NR | 436 | 102 | 33 | |||||
Green A | 2021 | USA | Cross-sectional | TS | 19.95 | 1216 | NR | 173 | 7 |
TS | 16.91 | 4537 | NR | 956 | |||||
Grossman A | 2007 | USA | Cross-sectional | MTF | 17.5 | 31 | 12 | 6 | 7 |
FTM | 19.5 | 24 | 13 | 8 | |||||
Jin H | 2020 | USA | Cross-sectional | MTF | 23.2 | 297 | 56 | NR | 7 |
Kittiteerasack P | 2020 | Thailand | Cross-sectional | TS | NR | 96 | 22 | NR | 8 |
TS | NR | 96 | 39 | 12 | |||||
Kota K | 2020 | USA | Cross-sectional | MTF | 35 | 92 | 30 | NR | 7 |
Kuper L | 2018 | USA | Cross-sectional | TS | 21.07 | 1896 | 1587 | 207 | 7 |
Lehavot K | 2016 | USA | Cross-sectional | TS | 49.28 | 212 | 120 | 68 | 7 |
Maksut J | 2020 | USA | Cross-sectional | MTF | NR | 381 | 226 | 50 | 8 |
Marshall B | 2015 | Argentina | Cross-sectional | TS | 30 | 482 | NR | 159 | 7 |
Perez-Brumer A | 2017 | USA | Cross-sectional | TS | 15.23 | 7653 | 2467 | NR | 7 |
Perez-Brumer A | 2015 | USA | Cross-sectional | TS | 32.74 | 1229 | NR | 355 | 8 |
TS | 32.74 | 1229 | NR | 51 | |||||
Peterson C | 2016 | USA | Cross-sectional | TS | 17.1 | 96 | NR | 27 | 6 |
Rabasco A | 2020 | USA | Cross-sectional | TS | 26.44 | 133 | NR | 62 | 6 |
Rabasco A | 2021 | USA | Cross-sectional | TS | 26.01 | 180 | NR | 75 | 6 |
Schweizer V | 2020 | USA | Cross-sectional | MTF | NR | 229 | 131 | NR | 7 |
FTM | NR | 121 | 94 | NR | |||||
Seelman L | 2016 | USA | Cross-sectional | TS | 31.02 | 2325 | NR | 1081 | 6 |
Mustanski B | 2010 | USA | Cross-sectional | TS | NR | 20 | 2 | 2 | 6 |