MEANING
The overlap in covariate values across comparison groups where comparisons can be made without extrapolation.
Use it for
Name the overlap needed for group comparisons.Helps explain when a comparison is supported by observed cases rather than extrapolated beyond them.
Words that belong together
- region of common support
- assess common support
- trim outside common support
On the page
The analysts restricted the estimate to common support because treated and untreated patients differed sharply at the extremes.
Nearby words
Opposite meanings
Word forms
- Base
- common support
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Usage notes
In matching and propensity-score analysis, inadequate overlap means some cases have no comparable counterparts; results may then rely on extrapolation.
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