Figure 4

Prediction of the follow-up haemoglobin. ROC curves plotting sensitivity against 1 minus specificity for a cut-off of 11.0 g/dL in the prediction of the haemoglobin one month later obtained from the nephrologists (dotted line) and from the best performing ANN (continuous line) (using as input variables the haemoglobin and epoetin dose from the currently and the 2 previous months). The areas under the curves, the 95% confidence intervals and the significance P for the Nephrologists and the ANN were respectively: 0.772 (0.702–0.881), P < 0.001 and 0.822 (0.758–0.887), P < 0.001(the difference between the two curves was not significant).