Table 3.

General recommendation on how to perform a systematic review on the content validity of PROMs

Authors of a systematic review of PROMs should clearly define the scopea of their review. This scope should be the reference point for evaluating content validity of the included PROMs

Content validity should be evaluated by at least two reviewers, independently

We recommend that the review team includes reviewers with at least some knowledge of the construct of interest; experience with the target population of interest; and some knowledge or experience with PROM development and evaluation, including qualitative research

The review team should also consider the content of the PROMs themselves

See Prinsen et al. for further details [13]

^aBy scope we mean the construct, target population, and measurement aim (e.g., evaluation) of interest in the review