Additional data file 5.

The mean D-index and associated standard errors of prognostic separation for the 10 hybrid prognostic (HPIp; red) indices in the three external cohorts (A1) JRH-1, (B1) UPP and (C1) JRH-2. In all cases, the risk-ordering of samples by the HPIp is determined by the average ranking induced by SPI and MPIp. Also shown is the D-index of the pathological/classical prognostic index (black) in each of the three external cohorts. The corresponding log-rank test p values (in log10-space) of the SPI and HPIp classifiers are shown for the cohorts (A2) JRH-1, (B2) UPP and (C2) JRH-2.

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Teschendorff et al. Genome Biology 2006 7:R101   doi:10.1186/gb-2006-7-10-r101