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. 2013 Feb 8;20(e1):e111–e117. doi: 10.1136/amiajnl-2012-001171

Table 3.

Confusion matrix from 10-fold cross-validation

Predicted category
Training data Validation data
Actual category NPE Pneumonia NP Pneumonia
NPE 26 7 27 6
Pneumonia 4 21 7 18

NPE, non-pneumonic exacerbation; PE, pneumonic exacerbation.