Table 4.

Quality and Risk of Bias Assessment Using the Modified Downs and Black Checklist

	DyEx studies (n = 6)						DySplit studies (n = 5)
	Badger et al. (2007)	Burgener et al. (2011)	Lowery et al. (2014)	Milbury et al. (2015)	Milbury et al. (2018)	Winters-Stone et al. (2016)	Barnes et al. (2015)	Lamb et al. (2018)	Maci et al. (2012)	Marques et al. (2015)	Yu et al. (2015)
Reporting	10	8	10	0	11	11	9	11	7	9	8
External Validity	0	0	0	0	0	0	0	0	0	0	0
Internal Validity—Bias	5	6	5	3	4	6	5	6	6	4	6
Internal Validity— Confounding	1	1	5	2	2	4	3	4	3	0	2
Power	0	0	1	0	0	1	0	1	0	0	0
Total Score and	16	15	21	15	17	22	17	22	16	13	16
Quality Rating	Fair	Fair	Good	Fair	Fair	Good	Fair	Good	Fair	Poor	Fair

Note: Quality rating: Excellent (26–28), Good (20–25), Fair (15–19), Poor (≤14).