Table 1.

The time frame, study type, and sample size of the included studies.

Variable		Value (N=25), n (%)	References
Study year
	2013-2018	25 (100)	[35-59]
Study type
	RCTa	12 (48)	[36,37,41,42,46,48-51,54,55,59]
	Quasi-RCT	2 (8)	[35,47]
	Non-RCT	1 (4)	[56]
	Before-after study	8 (32)	[38-40,43-45,52,53]
	Observational study	2 (8)	[57,58]
Sample size
	≤30	10 (40)	[35,43-45,50-53,57,58]
	31-50	7 (28)	[39-42,54-56]
	51-80	5 (20)	[36-38,47,59]
	≥81	3 (12)	[46,48,49]

^aRCT: randomized clinical trial.