Figure 4.

Two most important variables versus principal component analysis discriminating between tumor and normal lung. The plot on the left shows ability of the two most predictive variables (cytokeratin+ aneuploid and cytokeratin+ aneuploid CD117 negative CD133+) to distinguish between tumor and normal lung. The plot on the right shows the two principal components of five most important variables (Table 4). Numbers refer to the specimen ID column in Table 6. The case number indicates the frequency with which the case was correctly classified (lower number more frequently classified correctly). [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]