Group | Sensitivity | Specificity | Positive predictive value | Negative predictive value | Diagnostic accuracy |
Observation group (n = 5) | 66.67 (4/6) | 66.67 (2/3) | 71.43 (5/7) | 60.00 (3/5) | 66.67 (6/9) |
Control group (n = 4) | 33.33 (2/6) | 33.33 (1/3) | 28.57 (2/7) | 40.00 (2/5) | 33.33 (3/9) |
χ2 | 12.012 | 12.012 | 20.091 | 9.842 | 12.012 |
P | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 |