- Huw Llewelyn, general physician and endocrinologist1
- 1Nevill Hall Hospital, Abergavenny NP7 7EG, UK
- huw.llewelyn{at}orange.net
Clinical prediction rules and other “tests” should be assessed not only in terms of sensitivity and specificity,1 which show only how a test detects a single diagnosis in a defined population. Sensitivity is often set high and specificity low, so that a positive result suggests only a differential diagnosis. A …
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