Table 3. Newcastle-Ottawa quality assessment table for screening cohort studies.

*Star point rating, a star is awarded for fulfilling each question within each subsection of the Newcastle-Ottawa assessment.

Selected study	Study design [11]	Selection [11]	Comparability [11]	Outcome [11]	Total stars
Ng et al. (2022) [23]	Retrospective cohort	***	*	**	6/9=fair