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Fig. 3 | BMC Infectious Diseases

Fig. 3

From: Classification and Regression Tree (CART) analysis to predict influenza in primary care patients

Fig. 3

Receiver operating curve for CART algorithm on developmental sample for the outcome RT-PCR-confirmed Influenza. a Sensitivity = 278/330 = 84.2 %; Specificity = sum of all non-influenza subjects with negative symptoms in the terminal nodes/total non-influenza subjects, i.e. (93 + 160 + 594)/1757 = 48.2 %; Area under the Curve = 0.68. b Sensitivity = 84 %; Specificity = 49 %; Area under the Curve = 0.69

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