Table III.
Results of the user-seal-check compared with quantitative fit testing showing sex (N = 204; male: 44; female: 160)
| 3M 1860S |
3M 1862 |
|||||
|---|---|---|---|---|---|---|
| Male | Female | Overall | Male | Female | Overall | |
| Positive user-seal-check (%) | 11.3 | 13.1 | 12.8 | 18.2 | 15.0 | 15.7 |
| Fit-testing failure rate (%) (Prevalence of leakage) | 27.3 | 41.9 | 38.7 | 27.3 | 46.9 | 42.7 |
| True positive (TP) | 2 | 10 | 12 | 3 | 17 | 20 |
| False positive (FP) | 3 | 11 | 14 | 5 | 7 | 12 |
| False negative (FN) | 10 | 57 | 67 | 9 | 58 | 67 |
| True negative (TN) | 29 | 82 | 111 | 27 | 78 | 105 |
| Sensitivity or true positive rate (TPR) (%) | 16.7 | 14.9 | 15.2 | 25.0 | 22.7 | 23.0 |
| Specificity or true negative rate (TNR) (%) | 90.6 | 88.2 | 88.8 | 84.4 | 91.8 | 89.7 |
| False positive rate (FPR) (%) | 9.4 | 11.8 | 11.2 | 15.6 | 8.2 | 10.3 |
| False negative rate (FNR) (%) | 83.3 | 85.1 | 84.8 | 75.0 | 77.3 | 77.0 |
| Accuracy (ACC) (%) | 70.5 | 57.5 | 60.3 | 68.2 | 59.4 | 61.3 |
| Positive predictive value (PPV) (%) | 40.0 | 47.6 | 46.2 | 37.5 | 70.8 | 62.5 |
| Negative predictive value (NPV) (%) | 74.4 | 59.0 | 62.4 | 75.0 | 57.4 | 61.1 |
Sensitivity or TPR = TP/(TP + FN); Specificity or TNR = TN/(FP + TN); FPR = FP/(FP+TN); FNR = FN/(TP + FN); ACC = (TP + TN)/(N); PPV = TP/(TP+ FP); NPV = TN/(TN + FN).