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. 2009 Mar;11(2):117–130. doi: 10.2353/jmoldx.2009.080070

Figure 4.

Figure 4

ER classification. A: Performance measurements of classifications based on ER IHC status using various ΔΔCT cutoff points of the discovery sample set. B: Classification of the discovery sample set using the ΔΔCT cutoff point of 1.5. C: Distribution of ER ΔΔCT values with IHC status of the discovery and validation sample sets. PPV: positive predictive value; NPV: negative predictive value.