When choosing the most suitable outcome measurement instrument (OMI), investigators and other decision-makers often rely on the results of systematic reviews of OMIs. Improving the quality of reporting in such reviews can lead to better, and perhaps faster, decisions about which OMI is right for the job. Elsman and colleagues [
1] report the results of an impressively systematic consensus process to develop guidance for reporting systematic reviews of OMIs. The resulting guidance—PRISMA–COSMIN for OMIs 2024—will be useful for those conducting systematic reviews of OMIs, journal editors, manuscript reviewers, and consumers of systematic reviews. …