Outcome measures Flashcards
T/F most measurements are directly observable
False
we can measure only a correlate of the actual property
Biomarker
objective, quantifiable characteristics of biological process.
surrogate endpoint
substitute for clinically meaningful endpoint
Match Terms:
Reliability, Validity
Accuracy, Consistency
Reliability = Consistency
Validity = Accuracy
Correlation
the degree of association between 2 sets of data
draw scatter plot to visualize
correlation coefficient (r) to quantify it
Test-Retest reliability
consistency of repeated measurements that are separated in time
stability of a measurement
Intrarater reliability
consistency of repeated measurements by same PT at different times
Interrater reliability
Consistency of repeated measurements by multiple PTs.
Internal consistency
Consistency over multiple items or parts in a test, where each part is supposed to measure one concept
Face validity
does the content of the test appear to be suitable to its aims?
content validity
is the test fully representative of what it aims to measure?
construct validity
does the test measure the concept that it is intended to measure?
Dichotomous scale
categorical
two point scale
yes/no, T/F
5 point Likert scale
ordinal
5 point scale
always/often/sometimes/rarely/never
Visual Analog Scale
- continuous
- line with verbal anchors at either end
- put mark at point corresponding to rating