Variables | Cervical Length < 25 mm | PremaQuick | Actim Partus |
Sensitivity = TP/(TP + FN) × 100 | 59/(59 + 49) × 100 = 54.6% | 43/(43 + 65) × 100 = 39.8% | 15/(15 + 93) × 100 = 13.9%% |
Specificity = TN/(TN + FP) × 100 | 63/(63 + 49) × 100 = 56.3% | 107/(107 + 5) × 100 = 95.5% | 101/(101 + 11) × 100 = 90.2% |
PPV = TP/(TP + FP) × 100 | 59/(59 + 49) × 100 = 54.6% | 43/(43 + 5) × 100 = 89.6% | 15/(15 + 11) × 100 = 55.5% |
NPV = TN/(TN + FN) × 100 | 63/(63 + 49) × 100 = 56.3% | 107/(107 + 65) × 100 = 62.2% | 101/(101 + 93) × 100 = 52.1% |
Accuracy = TP + TN/(TP + TN + FP + FN) × 100 | 59 + 63/(59 + 63 + 49 + 49) × 100 = 55.5% | 43 + 107/(43 + 107 + 5 + 65) × 100 = 68.2% | 15 + 101/(15 + 101 + 11 + 93) × 100 = 52.7% |