Table 1.
Clinician predictions
| Provider Predictions | Blood Culture Result | Sensitivity (95% CI) | Specificity (95% CI) | Positive Predictive Value (95% CI) | Negative Predictive Value (95% CI) | ||
|---|---|---|---|---|---|---|---|
| Positive (n) | Negative (n) | ||||||
| Overall Prediction of Culture Result | Positive (n) | 41 | 107 | 82% (0.68,0.91) | 69% (0.64, 0.74) | 28% (0.21, 0.36) | 96% (0.93, 0.98) |
| Negative (n) | 9 | 241 | |||||
| RN Prediction of Culture Result | Positive (n) | 9 | 29 | 90% (0.54,0.99) | 61% (0.49, 0.72) | 24% (0.12, 0.41) | 98% (0.87, 0.99) |
| Negative (n) | 1 | 45 | |||||
| FLP Prediction of Culture Result | Positive (n) | 6 | 26 | 86% (0.42, 0.99) | 67% (0.55, 0.77) | 19% (0.08, 0.37) | 98% (0.89, 0.99) |
| Negative (n) | 1 | 52 | |||||
| Fellow Prediction of Culture Result | Positive (n) | 17 | 30 | 81% (0.57, 0.94) | 75% (0.66, 0.82) | 36% (0.23, 0.52) | 96% (0.89, 0.99) |
| Negative (n) | 4 | 90 | |||||
| Attending Prediction of Culture Result | Positive (n) | 9 | 22 | 75% (0.43, 0.93) | 71% (0.59, 0.81) | 29% (0.15, 0.48) | 95% (0.84, 0.99) |
| Negative (n) | 3 | 54 | |||||
Blood culture results compared to clinician prediction and characteristics of clinician prediction, separated by provider type. This table illustrates a series of classic “2 × 2” tables to calculate test characteristics sensitivity, specificity, positive and negative predictive values. For example, among RNs, the sensitivity was 90% or 9 of 10 positive cultures were correctly predicted to be positive. Abbreviations: RN registered nurse, FLP front line provider (in our unit, a resident or nurse practitioner), n number of observations, CI confidence interval