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Sample A: Cover Page of Thesis, Project, or Dissertation Proposal

Sample A: Cover Page of Thesis, Project, or Dissertation Proposal

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was one <strong>of</strong> them: it is counted as present in the adenocarcinoma samples and not detectable in the<br />

n<strong>or</strong>mal samples. The source <strong>of</strong> the discrepancy is the linear range filter: the 7 probes with<br />

reliable values in the diseased sample fall below that threshold in the n<strong>or</strong>mal samples. This<br />

ProbeSet alone can classify the Bhattacharjeedata with a 98.9% AUC, as even if you allow<br />

aggregation <strong>of</strong> probe values below 200 flu<strong>or</strong>escent units, only three <strong>of</strong> the n<strong>or</strong>mal samples have<br />

ProbeSet values greater than 200 f.u. Figure 4.4 presents boxplots <strong>of</strong> the BaFL-based ProbeSet<br />

means <strong>of</strong> the osteopontin log-transf<strong>or</strong>med expression values f<strong>or</strong> each <strong>of</strong> the five tissue classes in<br />

the Bhattacharee experiment. This figure mirr<strong>or</strong>s that <strong>of</strong> Hu’s 2005 plasma protein study on lung<br />

cancer [19]. The aggregated ProbeSet values used only the 7 probes which survived the cleansing<br />

f<strong>or</strong> the adenocarcinoma samples, although it should be noted that in the squamous carcinoma and<br />

small cell cancer samples additional probes were retained.<br />

101

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