Table 2.

Risk of bias summary of the included studies using the Quality in Prognosis Studies tool

Study	Study participation	Study attrition	Prognostic Factor Measurement	Outcome measurement	Study confounding	Statistical Analysis and Reporting
Tentori et al. 2010 [20]	Low	Low	High	Low	Low	Low
Lopes et al., 2014 [21]	Low	Unclear	Low	Low	Low	Low
Kutner et al., 2016 [22]	Low	Unclear	Low	Low	Low	Low
Zhang et al., 2017 [23]	Moderate	Low	Low	Low	Moderate	Low
Matsuzawa et al., 2018 [24]	Moderate	Unclear	Low	Low	Low	Low
Johansen et al., 2019 [25]	Low	Unclear	Low	Low	Low	Low
Stack et al., 2005 [26]	Moderate	Low	High	Low	Low	Low
Brar et al., 2019 [27]	Moderate	Low	Low	Low	Low	Low
Zelle et al., 2011 [28]	Low	Unclear	Low	Low	Low	Low
Rosas et al., 2012 [29]	Low	Unclear	Moderate	Low	Low	Low
Byambasukh et al., 2020 [19]	Low	Low	Low	Low	Low	Low