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Table 2 Statistical results of the 50 cases

From: Preliminary study for non – invasive optical detection of squamous and basal cell carcinomas

Statistic Item Result Notes
True positive (TP) 36 72% of all 50 cases
False positive (FP) 5 10% of all 50 cases
True negative (TN) 9 18% of all 50 cases
False negative (FN) Zero 0.00% of all 50 cases
Specificity (TNR) 64.62% = TN/(TN+FP)
Sensitivity (TPR) 100% = TP/(TP+FN)
The positive prediction value (PPV)
the proportion of true positives out of all positive results
87.8% = TP/(TP+FP)
The Negative prediction value (NPV)
the proportion of true positives out of all positive results
100% = TN/(TN+FN)
Accuracy of our predictive measurements (ACC) 90% ACC= (TP+TN)/(P+N)
Where; P = (TP+FN)
N = (FP+TN)