Figure 2.

Effect of the length of stay on discrimination of the Paediatric Index of Mortality (PIM) [4], Paediatric RISk of Mortality (PRISM) and PRISM III scores [1,2] for (a) the time points for which the scores were developed (1 hour [H1] for PIM, 24 hours [H24] for PRISM, and 12 hours [H12] and H24 for PRISM III) and (b) a different time period, namely 4 hours (H4).