TABLE A3.

Risk of bias assessment ^a of the study with a cohort design

	Selection					Outcome
Author, year	Representativeness of the exposed cohort	Selection of the non‐exposed cohort	Ascertainment of exposure	Demonstration that outcome of interest was not present at start of study	Comparability of cohorts on the basis of the design or analysis	Assessment of outcome	Was follow‐up long enough for outcomes to occur	Adequacy of follow‐up of cohorts	Final score
Kubjane et al. (2020)	1	1	1	0	2	1	1	0	7

^a Quality assessment was performed using the Newcastle‐Ottawa scale for cohort studies. For the questions concerning selection and outcome 1 point is assigned when adequate and 0 points if not. For the question on comparability of cohorts a maximum of 2 points can be assigned.