Quality Assurance: Quantitative Data	Schmitt et al. [38]	Rusnalasari et al. [39]	Schmitt et al. [43]
Why was the study conducted (is it a clearly focused question that addresses population, intervention and outcomes?)	Yes	Yes	Yes
What type of study (does the study design match the question asked. Intervention questions are best answered with randomised controlled trials. Is it an RCT?)	Yes	Yes	Yes
What are the study characteristics (can this be answered by PICO?) Population, Intervention, Control, Outcome)	Yes	Yes	Yes
Was bias addressed? What was done to address bias?	Yes	No	No
Are the results valid? (i.e., treatment effect, p-value)	Yes	No	Yes
Can clear conclusions be made? (can the results be generalised?)	Within stated limitations	Cannot tell	Within stated limitations