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Table 1 Definitions of Sensitivity, Precision and Specificity

From: Identifying observational studies of surgical interventions in MEDLINE and EMBASE

   Manual review of subject only electronic search
   Non-randomised studies (Reference standard) Other studies (Non-reference standard)
Search filter Retrieved A B
  Not retrieved C D
  1. Sensitivity = A/(A+C) × 100
  2. Precision = A/(A+B) × 100
  3. Specificity = D/(B+D) × 100