Table 1.

Baseline characteristics of all studies (n=31).

Characteristics		Value, n (%)
Study design
	SRsa & MAsb	21 (67)
	RCTc	8 (25)
	Non-RCT	1 (3)
	Qualitative study	1 (3)
Year
	2008-2011	3 (9)
	2012-2014	12 (38)
	2015-2017	9 (29)
	2018-2020	6 (19)

^aSR: systematic review.

^bMA: meta-analysis.

^cRCT: randomized controlled trial.