Table 1 Quality assessment of quantitative studies

First author

Reference

Are objectives clearly stated?

Is the design appropriate?

Are eligibility criteria, sources and methods of selection of participants described?

Are outcomes described?

Sources of data and details about methods of measurements described appropriate?

Risk of bias taken into account?

Is the study size adequate?

Are characteristics, numbers of participants and reasons for non-participation described?

Is the statistical method adequate?

Are relevant subgroups described in results?

Are results properly described?

Overall study quality