4.1 EES-Q score and domain scores
To obtain an easily interpretable score, the sum of scores in one domain were recalculated into a domain score ranging from 0 (not at all) to 100 (very severe inconvenience). Domain scores were calculated by summing the 10-item score of each domain, subtracting 10 points from this total and multiply this by 2.5. Domain scores were corrected for the missing answers by adjusting the subtracted value and the multiplication factor accordingly.11 The maximum number of missing answers was three per subject per domain, otherwise it was filed as missing data. The EES-Q score, ranging from 0 (not at all) to 100 (very severe inconvenience), was calculated by summing the three domain scores and dividing the total score by three.