Patient versus proxy response on global health scales: no meaningful DIFference.
Brittany R LapinNicolas R ThompsonAndrew SchusterIrene L KatzanPublished in: Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation (2019)
Our findings revealed the overestimation of symptoms by proxies is a real difference and not the result of measurement non-invariance. PROMIS GH items do not perform differently or have spuriously inflated severity estimates when administered to proxies instead of patients.