2.1 Inclusion Criteria
In this evaluation, OG COSs that had developed or applied methodologies
to determine which outcome areas or outcomes should be measured, or
important in clinical trials or other forms of health research, were
eligible for inclusion. We used the latest version whenever the COSs had
been updated. Studies that; only reported the use of a COS, were
systematic reviews of clinical trials, focused on systematic reviews and
surveys of outcomes measured in clinical trials or quantitative
descriptions (e.g. frequency) of outcomes, or protocol of COS, were
excluded. There were no limitations on the year of publication,
language, age of participants, and types of interventions.