Comparing patient global impression of severity and patient global impression of change to evaluate test-retest reliability of depression, non-small cell lung cancer, and asthma measures.
Sonya EremencoWen-Hung ChenSteven I BlumElizabeth Nicole BushDonald M BushnellKendra DeBuskAdam GaterLinda NelsenStephen Joel Coonsnull nullPublished in: Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation (2022)
When considering anchor measures to identify a stable subgroup for test-retest reliability analyses, current state anchors perform better than retrospective anchors. Researchers should carefully consider the type of anchor selected, the time period covered, and should ensure anchor content is consistent with the target measure concept, as well as inclusion of both current and retrospective anchor measures.