| Age | Number examined | Sensitivity (%) | Specificity (%) | Likelihood ratio Positive test | Likelihood ratio Negative test | Diagnostic odds ratio |
| 0 - 10 | 677 | 66.9 | 100 | ∞ | 0.3 | ∞ |
| 11 - 20 | 734 | 73.0 | 96.8 | 22.8 | 0.3 | 76 |
| 21 - 30 | 191 | 40.5 | 94.2 | 7.0 | 0.6 | 11.7 |
| 31 - 40 | 224 | 58.3 | 93.1 | 8.5 | 0.5 | 17 |
| 41≤ | 125 | 53.3 | 90.9 | 5.6 | 0.5 | 11.2 |
| Total | 1951 | 66.7 | 96.5 | 19.1 | 0.4 | 47.6 |