Comparing various cytology grade spectra using multivariate analysis.

<p>(<b>A</b>) Comparison of spectral points for Negative <i>vs.</i> LSIL <i>vs.</i> HSIL (closed symbols) with HPV <i>vs.</i> ASCUS <i>vs.</i> Cancer (open symbols). Scores plots with confidence ellipse showing the relationship of (<b>B</b>) cancer with HSIL; (<b>C</b>) ASCUS with LSIL; and, (<b>D</b>) HPV-like features with Negative cytology; (<b>E</b>) Peak detection plot following linear discriminant analysis (LDA) showing top six wavenumbers responsible for segregation of Negative cytology from ASCUS, HPV and Cancer cytology.