Table 3.

Quality assessment and selection criteria.

Criteria for quality assessment
Design	(i) Does the abstract provide sufficient information? (ii) Does the study clearly state its objective? (iii) Does it describe its method clearly? (iv) Are the research methods used effectively in attaining the research objectives? (v) Is the study setting and used sample justified and reproductive? (vi) Does the study fully define its evaluation metrics? (vii) Are the utilized evaluation metrics significant for the research?
Data acquisition	(i) Does the research describe its data collection method adequately?
Data analysis	(i) Does the study describe its data analysis adequately? (ii) Does it compare its results with that of other studies?
Conclusion	(i) Does the study clearly state its findings? (ii) Do the results support the findings? (iii) Does it highlight its limitations?