Table 3.

Newcastle–Ottawa Scale assessment of quality and bias

Newcastle–Ottawa Scale
Study ID	Selection				Comparability	Outcome			Total score (max = 10)	Power
	Representativeness of the exposed cohort (max = *)	Selection of the non-exposed cohort (max = *)	Ascertainment of exposure (max = *)	Demonstration that outcome of interest was not present at start of study (max = *)	Comparability of cohorts on the basis of the design or analysis (max = **)	Assessment of outcome (max = *)	Was follow-up long enough for outcomes to occur (max = *)	Adequacy of follow-up of cohorts (max = *)
Moore, 2016	*	*	*	-	-	*	*	*	6	Good quality
Pedersen, 2020	*	*	*	-	-	*	-	*	5	Good quality
Giger, 2009	*	*	*	-	-	*	-	*	5	Good quality
Bjurstorm, 2016	*	*	*	-	-	*	*	*	6	Good quality
Muto, 2005	*	*	*	-	-	*	*	*	6	Good quality