Fig 1.
Fig 1 shows the flow diagram of participants in this study. We began with records of all patients who presented to the ER between April 2011 and March 2012. After the random sampling and exclusions indicated in the Figure, we analysed data from 1515 patients for the derivation set, and data from 467 patients for the validation set.
Table 1.
Demographic and clinical characteristics.
Table 2.
Univariate associations between candidate predictors and true bacteremia in the derivation set,
Table 3.
Multivariate analysis (n = 1288) and scoring.
Fig 2.
Percentages of patients with true bacteremia, by ID-BactER score.
Fig 2 shows, for each of five categories defined by ID-BactER score, the percentage of patients in that category who had true bacteremia.
Fig 3.
Fig 3 shows the ROC curves for the ID-BactER score.
ROC curves of ID-BactER score. The ●s indicate results from the derivation set, and the ○s indicate results from the validation set. The areas under the curves are 0.80 (95% CI, 0.77–0.83) for the derivation set and 0.74 (0.68–0.80) for the validation set.
Table 4.
Performance of the ID-BactER score.
Table 5.
Three existing models and our model developed in ER settings.