Table 1 Formulas for calculating the sensitivity, specificity, and Number Needed to Read (NNR)
From: The development of PubMed search strategies for patient preferences for treatment outcomes
Relevant | Not relevant | Total | |
|---|---|---|---|
Identified | A (true positives, correct inclusion) | B (false positives, incorrect inclusion) | Total identified |
Not identified | C (false negatives, incorrect exclusion) | D (true negatives, correct exclusion) | Total not identified |
Total | A + C (total relevant hits) | B + D (total not relevant hits) | A + B + C + D (total database) |