Table 1. The quality assessment of the included cohorts according to the NOS.

Each * represents a score. * = 1 point and ** = 2 points

Note: A study can be awarded a maximum of one star for each numbered item within the Selection and Exposure categories. A maximum of two stars can be given for Comparability.

Author and year	Cohort studies
	Selection				Comparability	Outcome			Quality score	Quality level
	Representativeness of the exposed cohort	Selection of the non-exposed cohort	Ascertainment of exposure	Demonstration that outcome of interest was not present at the start of the study	Comparability of cohorts based on the design or analysis	Assessment of outcome	Was follow-up long enough for outcomes to occur	Adequacy of follow-up of cohorts
Dehiol et al. 2022 [17]	*	*	*	*	**	*	*	*	9	good
Chen et al. 2020 [18]	*	*	*	*	**	*	*	*	9	good
Melchior et al. 2022 [19]	*	*	*	*	*	*	*	*	8	fair
Supanitayanon et al. 2020 [20]	*	*	*	*	*	*	*	*	8	fair