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. 2014 Mar 18;13(4):596–604. doi: 10.1111/acel.12215

Figure 3.

Figure 3

First component value from partial least squares discriminant analysis showing strong separation of males and females. (A) anion exchange column [minimum classification error rate (CER) based on ten-fold validation = 0.017, using four metabolites]. After permuting the class variable (sex), CER = 0.385 ± 0.008 (mean ± standard error, n = 10 permutations). (B) C18 column (minimum CER = 0.021 based on 25 metabolites. After permutation, CER = 0.371 ± 0.015 [mean ± SE, n = 10 permutations]).