First author (year)	Was an ‘a priori’ design provided?	Was there duplicate study selection and data extraction?	Was a comprehensive literature search performed?	Was the status of publication used as an inclusion criterion?	Was a list of studies (included and excluded) provided?	Were the characteristics of the included studies provided?	Was the scientific quality of the included studies assessed and documented?	Was the scientific quality of the included studies used appropriately in formulating conclusions?	Were the methods used to combine the findings of studies appropriate?	Was the likelihood of publication bias assessed?	Was the conflict of interest stated?	Total score
Clark, B. (2017) [59]	x	Unclear	x	x	Included yes, not excluded	x	x	x	x	x	x	9.5
Hartmann, C. (2017) [55]	x	x	x	x	Included yes, excluded not	x	Unclear	x	x	Unclear	No	7.5
Pitt, E. (2017) [45]	x	One reviewer for titles, abstracts. Full text by three authors	x	x	Included yes, not excluded	x	x	x	x	x	x	10
Román, S. (2017) [42]	x	x	x	x	Included yes, not excluded	x	x	x	x	Unclear	x	9.5
Bryant, C. (2018) [56]	x	Unclear	X	x	Included yes, not excluded	x	x	x	Unclear	x	No	7.5
Samoggia, A. (2018) [53]	x	Unclear	x	x	Included yes, not excluded	x	Unclear	x	x	Unclear	No	6.5
Zorbas, C. (2018) [13]	x	Unclear	x	x	Included yes, not excluded	x	x	x	x	Unclear	x	8.5
Abril, E. P. (2019) [47]	Unclear	Partly	x	No	Included yes, not excluded	x	No	x	x	No	x	6
Graça J. (2019) [43]	x	x	x	x	Included yes, not excluded	x	No	x	x	No	No	7.5
Kushwah, S. (2019) [50]	x	x	x	x	Included yes, not excluded	x	x	x	x	x	No	9.5
Mackenbach, J. D. (2019) [60]	x	x	x	x	Included yes, not excluded	x	x	x	x	Unclear	Unclear	8.5
Oostenbach, L. H. (2019) [41]	x	x	x	Unclear	Included yes, not excluded	Not in table	x	x	x	x	x	8.5
Tobi, R. C. A. (2019) [40]	x	x	x	x	Included yes, not excluded	x	x	x	x	Unclear	x	9.5
Bennett, R. (2020) [44]	x	x	x	x	No	No	x	Unclear	Unclear	No	x	6
Cantillo, J. (2020) [38]	x	x	x	x	No	x	No	Unclear	x	No	x	7
Harbers, M. C. (2020) [63]	x	x	x	No	No	x	x	x	x	No	x	8
Harguess, J. M. (2020) [48]	x	No	x	No	No	x	No	x	Unclear	x	No	5
Karpyn, A. (2020) [62]	x	x	x	No	No	No	No	x	x	No	x	6
Rivaroli, S. (2020) [57]	x	x	x	x	No	x	Unclear	x	x	No	No	7
Stampa, E. (2020) [39]	X	Unclear	x	No	No	x	No	Unclear	Unclear	x	No	3
Young, E. (2020) [58]	X	No	x	No	No	x	No	x	x	No	x	6
Bastounis, A. (2021) [49]	X	x	x	x	x	x	x	x	x	Unclear	x	10
Turner, G. (2021) [61]	X	Unclear	x	x	x	x	x	x	x	Unclear	x	9
Govzman, S. (2021) [46]	X	Unclear	x	x	x	x	Unclear	x	x	Unclear	x	8
Hartmann, T. (2021) [52]	X	No	x	x	Included yes, not excluded	x	No	x	x	No	x	7.5
Biasini, B. (2021) [66]	x	x	x	x	Included yes, not excluded	x	No	Unclear	x	No	No	6.5
Potter, C. (2021) [54]	x	x	x	Unclear	Included yes, not excluded	x	x	x	x	x	x	9.5
Aguirre Sánchez, L. (2021) [51]	x	x	x	Unclear	Included yes, not excluded	x	x	x	x	No	x	8.5