Letter
Outcome measures should be relevant.
British Medical Journal 1992; 304 doi: https://doi.org/10.1136/bmj.304.6831.917-c (Published 04 April 1992) Cite this as: British Medical Journal 1992;304:917
Article usage
Article metrics provide readers and authors with an indication of how often a specific article has been accessed month by month. It counts three formats - abstract/extract, full text and pdf. The page is updated each day.