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. 2018 Nov 3;43(2):149–153. doi: 10.1093/jat/bky075

Figure 1.

Figure 1.

Sample distributions and classification accuracies by concentration. Panels (A) and (C) are the log distributions of the samples selected for use with the COT200 and COT10 test strips, respectively. Panels (B) and (D) are the classification results relative to concentration for COT200 and COT10 samples, respectively. Results labeled “Correct” were properly classified based on the stated cutoffs for the test strips. The results labeled “Error” are incorrect classifications, including both false positive and false negative results. The vertical lines represent the nominal cutoff concentration for the test strip. The classifications found for the samples analyzed with the COT200 strips were: true positive = 199, false positive = 16, true negative = 184, false negative = 1. For the COT10 strips the corresponding values were: true positive = 146, false positive = 25, true negative = 227, false negative = 2.