| Development study | Rating of reviewers | OVERALL RATINGS | QUALITY OF EVIDENCE |  |
---|---|---|---|---|---|
Score: +  = sufficient;—= insufficient; ? = indeterminate; ±  = inconsistent |  ± / ± / ? |  ± / ± / ? |  ± / ± / ? | High, moderate, low, very low |  |
 | consensus | consensus | consensus |  |  |
Relevance | Â | Â | Â | Â | Â |
1 | Are the included items relevant for the construct of interest?1 | ? |  +  |  |  |
2 | Are the included items relevant for the target population of interest?1 | ? |  +  |  |  |
3 | Are the included items relevant for the context of use of interest?1 | ? |  +  |  |  |
4 | Are the response options appropriate? | ? |  +  |  |  |
5 | Is the recall period appropriate? | ? |  +  |  |  |
 | RELEVANCE RATING (± / ± / ?) | ? |  +  |  +  |  |
Comprehensiveness | Â | Â | Â | Â | Â |
6 | Are all key concepts included? | ? |  ±  |  |  |
 | COMPREHENSIVENESS RATING (± / ± / ?) | ? |  ±  |  ±  |  |
Comprehensibility | Â | Â | Â | Â | Â |
7 | Are the PROM instructions understood by the population of interest as intended? | ? | Â | Â | Â |
8 | Are the PROM items and response options understood by the population of interest as intended? | ? | Â | Â | Â |
9 | Are the PROM items appropriately worded? |  |  +  |  |  |
10 | Do the response options match the question? |  |  +  |  |  |
 | COMPREHENSIBILITY RATING (± / ± / ?) | ? |  +  |  +  |  |
 | CONTENT VALIDITY RATING (± / ± / ?) | ? |  ±  |  ±  | Very low |