Fig. 2. Cross-Validation Score Across 100 Bootstrap Iterations of Treelet Cross-Validation.

Treelet transform cross-validation was carried out for 5 component treelet transform, in 100 bootstrap samples of the analytic cohort (80% sampled with replacement). Cross-validation scores within each iteration were standardized, and the mean cross-validation score (across 100 bootstrap iterations) plotted across cut-off levels. The blue line represents the standardized mean score by cut-level and gray shaded area indicates the 95% confidence interval. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)