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Table 3 Misclassification error estimates (leave-one-out cross-validation) for response prediction.

From: The effect of the stromal component of breast tumours on prediction of clinical outcome using gene expression microarray analysis

Set of samples Sample size Minimum error rate n of genes used in predictor p value on 'subset' permutation p value on 'label' permutation
All (20%–90%) 43 28% 3 Not determined 0.079
High range (50%–95%) 25 12% 4 0.026 0.021
Low range (20%–50%) 24 13% 7 0.039 0.028
Mid range (35%–60%) 24 8% 7 0.001 0.002
  1. Column 1 shows the division of samples into three groups according to percentage invasive tumour content. Details of minimum error predictors for all samples and subsets. Permutation p values were calculated as described in Materials and methods.