Table 2.

The quality assessment of included studies by the Newcastle-Ottawa quality assessment scale.

Study	Selection				Comparability	Outcome			Scores
	Representativeness of the exposed cohort	Selection of the nonexposed cohort	Ascertainment of exposure	Demonstration that outcome of interest was not present at start of study		Assessment of utcome	Was follow-up long enough for outcomes to occur	Adequacy of follow-up of cohorts
Mohsenizadeh, 2022	✵	✵	✵	✵	✵✵	✵	✵	✵	9
Guler, 2022	✵	✵	✵	✵	✵✵	✵	✵	-	8
De Luca, 2021	✵	✵	✵	✵	✵✵	✵	✵	✵	9
Little, 2020	✵	✵	✵	✵	✵	✵	✵	✵	8
Choudry, 2020	✵	✵	✵	✵	✵✵	✵	✵	-	8