Table 3.
Sensitivity, specificity of the method used for ascertaining any of the six types of healthcare-associated infections (HAIs) among 1655 eligible patients enrolled at the University Medical Centre Ljubljana in the Slovenian national HAI prevalence survey in 2011, in comparison to the retrospective medical chart review estimated by extrapolation of the results of the retrospective medical chart review conducted among 1474 patients.
| Retrospective medical chart review | ||||
|---|---|---|---|---|
| HAI | No HAI | Total | ||
| Slovenian national HAI prevalence survey | HAI | 77a | 19 | 96 |
| No HAI | 9 | 1550b | 1559 | |
| Total | 86 | 1569 | 1655 | |
a
77=PPVx96
b
1550=NPVx1559
Sensitivity: 77/86x100=89.5% (95% CI: 81.1%-95.1%)
Specificity: 1550/1569x100=98.8% (95% CI: 98.1%-99.2%)