Table 2. Risk of bias assessment tool for non-randomized studies (RoBANS).

LoE: levels of evidence

	Selection of participants	Confounding variables	Blinding of outcome assessment	Incomplete outcome data	Selective outcome reporting	LoE
Lopes et al (2022) [6]	Low	Low	Unclear	Low	Low	I
Fenton et al. (2018) [38]	Low	Low	Low	Low	Low	I
Fillingim et al. (2011) [43]	High	High	Unclear	Low	Low	I
Solis et al. (2017) [36]	Low	Unclear	Unclear	Low	Low	III
Muhvićurek et al. (2015) [18]	Low	Low	Unclear	Low	Low	III
Uhac I et al. (2014) [17]	Unclear	Unclear	Unclear	Low	Low	III
Tay et al (2019) [13]	Low	Low	Unclear	Low	Low
Knibbe et al. (2022) [18]	Low	Unclear	High	Low	Low