|
| Authors/year/country | Randomization | Allocation concealment | Blinding | Incomplete outcome data | Selective outcome reporting | Other sources of bias |
|
| Bai et al. 2020 [24] USA | Random number table | Unclear | Unclear | Yes | Yes | Unclear |
| Baumgartner and Schneider 2023 [25] USA | Computer-generated random number table | Mention | Subjects | Yes | Yes | Unclear |
| Cavanagh et al. 2013 [33] USA | Research randomizer website | Computer generated blocked random allocation | Yes (research assistant, participants) | Yes | Yes | Unclear |
| Chen et al. 2013 [34] USA | Computer-generated random number table | Mention | Yes (research assistant, participants) | Yes | Yes | Unclear |
| Danitz and Orsillo 2014 [30] USA | Computer-generated random number table | Unclear | Unclear | Yes | Yes | Unclear |
| Martínez-Rubio et al. 2021 [35] UK | Computer-generated random number table | Mention | Unclear | Yes | Yes | Unclear |
| Delgado et al. 2010 [36] USA | Computer-generated random number table | Unclear | Unclear | Yes | Yes | Unclear |
| Dvořáková et al. 2017 [37] USA | Online randomizer | Mention | Yes (research assistant, participants) | Yes | Yes | Unclear |
| Vibe et al. 2013 [38] NOR | Computer-generated random number table | Unclear | Unclear | Yes | Yes | Unclear |
| Seppälä et al. 2020 [26] UK | Random number table | Mention | Yes (participants) | Yes | Yes | Unclear |
| Galante et al. 2020 [32] USA | Computer-generated random number table | Concealed in opaque, sealed envelopes | Yes (student sample) | Yes | Yes | Unclear |
| Greeson et al. 2014 [31] USA | Research randomizer (www.randomizer.org) | Blocked randomization | Yes (MBSR course instructors) | Yes | Yes | Unclear |
| Gu et al. 2018 [49] CHA | Computer-generated random number table | Concealed in opaque, sealed envelopes | Yes (participants) | Yes | Yes | Unclear |
| Hazlett-Stevens and Oren 2016 [40] USA | Mention | Unclear | Unclear | Yes | Yes | Unclear |
| Huberty et al. 2019 [27] USA | Online randomization tool (randomizer.org) | Mention | Yes (participants) | Yes | Yes | Unclear |
| Kang et al. 2009 [41] KOR | Mention | Mention | Yes (participants) | Yes | Yes | Unclear |
| Kvillemo et al. 2016 [42] SWE | Random number table | Mention | Yes (participants) | Yes | Yes | Unclear |
| Luethcke et al. 2011 [43] USA | Block-randomization procedure | Unclear | No | Yes | Yes | Unclear |
| Lever Taylor et al. 2014 [44] UK | Block randomization | Mention | Yes (participants) | Yes | Yes | Unclear |
| Erogul et al. 2014 [45] USA | Random number table | Mention | Yes (participants) | Yes | Yes | Unclear |
| Simonsson et al. 2013 [29] USA | Random number table | Mention | Unclear | Yes | Yes | Unclear |
| Ritvo et al. 2021 [28] CAN | 1 : 1 block randomization | Concealed in opaque, sealed envelopes | Yes (participants and research assistant) | Yes | Yes | Unclear |
| Phang et al. 2015 [50] CHA | Random number table | Mention | Yes (participants) | Yes | Yes | Unclear |
| Recabarren et al. 2019 [46] CH | Computer-generated random number table | Mention | Yes (participants) | Yes | Yes | Unclear |
| Sun et al. 2021 [47] USA | Random number table | Mention | Yes (participants) | Yes | Yes | Unclear |
| Song and Lindquist 2015 [48] USA | Computer-generated random number table | Mention | Yes (participants) | Yes | Yes | Unclear |
| van Dijk et al. 2017 [51] NL | Research randomizer website | Mention | Yes (participants) | Yes | Yes | Unclear |
| Yang et al. 2018 [53] USA | Research randomizer website | Mention | (participants and research assistant) | Yes | Yes | Unclear |
| Gu et al. 2017 [39] CHA | Computer-generated random number table | Unclear | Yes (subjects) | Yes | Yes | Unclear |
| Warnecke et al. 2011 [52] AUS | Random number table | Mention | Yes (participants) | Yes | Yes | Unclear |
|
