Table 2.

Individual and Aggregate Quality Assessment of Reviewed Studies

	Aaberg (2016)	Cornelius, Enwaana, Alston, & Baldwin (2017)	Sirota (2013)	Walsh & Hendrickson (2015)	Reports Meeting Criteria
Are there clear research questions? *	Yes	Yes	Yes	Yes	100%
Do the collected data allow to address the research questions? *	Yes	Yes	Yes	Yes	100%
Is the sampling strategy relevant to address the research question?	Yes	Undetermined	Yes	Yes	75%
Was the study population clearly specified and defined, and is the sample representative of the target population?	Undetermined	Undetermined	Yes	No	25%
Was a sample size justification, power description, or variance and effect estimates provided?	Yes	No	Yes	No	50%
Are the measurements appropriate?	No	Yes	Yes	Yes	75%
Is the risk of nonresponse bias low?	No	Undetermined	Undetermined	No	0%
Is the statistical analysis appropriate to answer the research question?	No	Undetermined	Yes	Yes	50%

Note:

^*Initial screening questions included in MMAT