Table 2.
Methodological quality of included studies.
| Study | (a) Are there any clear descriptions of the study settings? | (b) Is sufficient information about the participants presented? | (c) Validated criteria (i.e., assessment tool) for suicidal behavior used? | (d) Is there a description of whether the participants provided informed consent? | (e) Are there any descriptions of consecutive participants? | (f) Can these results be generalized to individuals with chronic pain? |
|---|---|---|---|---|---|---|
| Smith et al. (2004) | Y | Y | N | NA | Y | Y |
| Ratcliffe et al. (2008) | Y | Y | N | NA | NA | Y |
| Poole et al. (2009) | Y | Y | N | N | N | Y |
| Kanzler et al. (2012) | Y | Y | N | NA | N | Y |
| Dutta et al. (2013) | Y | Y | N | Y | N | Y |
| Cheatle et al. (2014) | N | Y | N | NA | N | Y |
| Campbell et al. (2015a) | Y | Y | Y | NA | NA | Y |
| Campbell et al. (2015b) | Y | Y | Y | NA | NA | Y |
| Ciaramella and Poli (2015) | Y | Y | Y | Y | N | Y |
| Im et al. (2015) | Y | Y | NR | NA | NA | N |
| Bertoli and de Leeuw (2016) | Y | Y | N | Y | Y | N |
| Campbell et al. (2016) | Y | Y | Y | NA | N | Y |
| Bromberg et al. (2017) | Y | Y | N | Y | N | N |
| Ciaramella (2017) | Y | Y | Y | NA | Y | Y |
| Wilson et al. (2017) | Y | N | Y | Y | Y | Y |
| Blakey et al. (2018) | Y | Y | Y | Y | N | N |
| Lewcun et al. (2018) | Y | Y | N | Y | N | N |
| Vaegter et al. (2019) | Y | Y | N | N | N | Y |
| Abdelghani et al. (2020) | Y | Y | N | NA | NA | Y |
| Androulakis et al. (2021) | Y | Y | N | NA | N | N |
| Rojas et al. (2021) | Y | Y | N | Y | N | Y |
| Wang et al. (2021) | Y | Y | N | Y | Y | N |
| Song et al. (2022) | Y | Y | N | NA | N | N |
N, no; NA, not applicable; NR, not reported, Y, yes.