Table 1 Ten criteria for rating content validity

Relevance

1. Are the included items relevant for the construct of interest?

2. Are the included items relevant for the target population of interest?

3. Are the included items relevant for the context of use of interest?

4. Are the response options appropriate?

5. Is the recall period appropriate?

Comprehensiveness

6. Are no key concepts missing?

Comprehensibility

7. Are the patient-reported outcome measure (PROM) instructions understood by the population of interest as intended?

8. Are the PROM items and response options understood by the population of interest as intended?

9. Are the PROM items appropriately worded?

10. Do the response options match the question?