Group | Sensitivity | Specificity | Positive predictive value | Negative predictive value | Diagnostic accuracy |
Observation group (n = 8) | 87.50 (7/8) | 40.00 (2/5) | 77.78 (7/9) | 80.00 (4/5) | 69.23 (9/13) |
Control group (n = 9) | 62.50 (5/8) | 20.00 (1/5) | 55.56 (5/9) | 40.00 (2/5) | 46.15 (6/13) |
χ2 | 9.045 | 9.684 | 10.684 | 19.557 | 11.531 |
P | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 |