Formulae for calculating the sensitivity, specificity, precision and accuracy of medline searches
| Hand search of the literature | |||
| Meets criteria | Does not meet criteria | ||
| Search terms | Detected | a | b |
| Not detected | c | d | |
| a+c | b+d | ||
Sensitivity=a/(a+c). Specificity=d/(b+d). Precision=a/(a+b). Accuracy=(a+d)/(a+b+c+d).