Table 1.

Summary of critical appraisal of included studies using the Newcastle-Ottawa quality assessment scale for cohort studies

Study ID	Selection (max 4 stars)	Comparability (max 2 stars)	Outcomes (max 3 stars)
Kumar and Thompson [19]	***	-	**
Patel et al. [20]	***	-	**
Vargas et al. 2017 (This study)	***	-	**

The number of * reflects the number of stars each reference was given as part of their appraisal process with the least amount being none and highest amount attainable found in each column