Abstract
Responsiveness has been proposed as a criterion, in addition to reliability and validity, to evaluate instruments that measure quality of life or functional status. The responsiveness index measures the change in a quality of life score due to a treatment relative to the variability of changes in that score within a stable control group. We derive the expected value, variance and distribution of the responsiveness index and give a large sample distribution for comparing the responsiveness of two different instruments. We also give the relationship between the responsiveness index and the power of a test of treatment effect.
Original language | English (US) |
---|---|
Pages (from-to) | 417-421 |
Number of pages | 5 |
Journal | Journal of Clinical Epidemiology |
Volume | 44 |
Issue number | 4-5 |
DOIs | |
State | Published - 1991 |
Keywords
- Evaluative instrument
- Power
- Reliability
- Responsiveness
- Sensitivity to change
- Validity
ASJC Scopus subject areas
- Epidemiology