INTRODUCTION
The concept of critical appraisal has made it possible for the realization of the improvement of quality and cost of healthcare. This is made possible through getting the best evidence (research evidence) on the results of health care intercessions by identifying the strengths and weaknesses of research, assessing the usefulness, and validating the findings. In a critical appraisal, assessment of the suitability and the methodological features of the study design are of utmost importance.
