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Table 1 Naïve and cross-validated comparison of the predictive performance of the five approaches, with 95% confidence intervals

From: Validating and updating a risk model for pneumonia – a case study

Comparison Statistic Approach 1 Approach 2 Approach 3 Approach 4 Approach 5
Naïve AUC* 0.633 (0.567-0.695) 0.633 (0.567-0.695) 0.759 (0.701-0.809) 0.757 (0.699-0.807) 0.765 (0.707-0.815)
  BS** 0.246 (0.219-0.272) 0.163 (0.142-0.183) 0.135 (0.116-0.154) 0.136 (0.116-0.155) 0.134 (0.114-0.154)
Cross validated AUC 0.633 (0.567-0.695) 0.616 (0.550-0.679) 0.707 (0.644-0.763) 0.707 (0.644-0.763) 0.695 (0.632-0.752)
  BS 0.246 (0.219-0.272) 0.164 (0.143-0.185) 0.146 (0.126-0.167) 0.146 (0.126-0.166) 0.149 (0.128-0.171)
  1. * AUC = Area under the receiver operating characteristic curve, ** BS = Brier score.