Figure 1.

Gene expression changes of a representative predictive gene pair. Shown is the pair PTPRD [205712_at], TNFAIP3 [202643_s_at]. The pair is presented in Table 4 with a prediction accuracy of 90.5% determined using the support vector machine algorithm (signal log ratios for t₁ versus t₀: (○) 12 responders and (●) seven nonresponders, defined due to clinical response; bars denote the confidence intervals of the signal log ratios). Patient 16 was classified as a nonresponder based on gene expression data, but as a responder from clinical status.