Sensitivity and Specificity
Sensitivity = SnNout (high sens = neg Rule out)
proportion of patients with the disease who have a positive test:
Sensitivity = True positive / [True positive + False negative]
Specificity = SpPin (high spec = pos Rule in)
proportion of patients without the disease who have a negative test:
Specificity = True Negative / [False positive + True negative]
- Andersson GB, Deyo RA. History and physical examination in patients with herniated lumbar discs. Spine. 1996;21(suppl 24): 10S-18S.