Table 3.
Predictive Values per Fissure Completeness Score
| Right Major Fissure (N=106) | |||||||
|---|---|---|---|---|---|---|---|
| FCS | CVneg | CVpos | Sens | Spec | PPV | NPV | Number of Chartis Needed* |
| >80 | 64.4% | 35.6% | 12.2 | 96.0 | 64.4 | 100.0 | 2.8 |
| >83 | 65.0% | 35.0% | 14.6 | 100.0 | 65.0 | 100.0 | 2.9 |
| >85 | 67.0% | 33.0% | 22.0 | 100.0 | 67.0 | 100.0 | 3.0 |
| >90 | 69.9% | 30.1% | 31.7 | 100.0 | 69.9 | 100.0 | 3.3 |
| >93 | 74.7% | 25.3% | 48.8 | 95.4 | 74.7 | 87.0 | 4.0 |
| >95 | 73.7% | 26.3% | 51.2 | 86.2 | 73.7 | 70.0 | 3.8 |
| >96 | 76.5% | 23.5% | 61.0 | 80.0 | 76.5 | 65.8 | 4.3 |
| >97 | 77.8% | 22.2% | 65.9 | 75.4 | 77.8 | 62.8 | 4.5 |
| >98 | 81.6% | 18.4% | 78.0 | 61.5 | 81.6 | 56.1 | 5.4 |
| >99 | 80.0% | 20.0% | 82.9 | 43.1 | 80.0 | 47.9 | 5.0 |
| 100 | 85.7% | 14.3% | 92.7 | 27.7 | 85.7 | 44.7 | 7.0 |
| Right Upper Lobe Fissure (N=115) | |||||||
| FCS | CVneg | CVpos | Sens | Spec | PPV | NPV | Number of Chartis Needed* |
| >75 | 40.9% | 59.1% | 32.3 | 94.0 | 51.6 | 87.5 | 1.7 |
| >80 | 56.0% | 44.0% | 43.1 | 96.1 | 56.0 | 90.3 | 2.3 |
| >83 | 54.7% | 45.3% | 47.7 | 82.0 | 54.7 | 77.5 | 2.2 |
| >85 | 58.2% | 41.8% | 56.9 | 78.0 | 58.2 | 77.1 | 2.4 |
| >90 | 66.0% | 34.0% | 73.8 | 66.0 | 66.0 | 73.8 | 2.9 |
| >93 | 69.6% | 30.4% | 78.5 | 64.0 | 69.6 | 73.9 | 3.3 |
| >95 | 73.2% | 26.8% | 83.1 | 60.0 | 73.2 | 73.0 | 3.7 |
| >96 | 73.0% | 27.0% | 84.6 | 54.0 | 73.0 | 70.5 | 3.7 |
| >97 | 71.4% | 28.6% | 84.6 | 50.0 | 71.4 | 68.8 | 3.5 |
| >98 | 73.3% | 26.7% | 87.7 | 44.0 | 73.3 | 67.1 | 3.8 |
| >99 | 80.8% | 19.2% | 92.3 | 42.0 | 80.8 | 67.4 | 5.2 |
| 100 | 81.3% | 18.8% | 95.4 | 26.0 | 81.3 | 62.6 | 5.3 |
| Left Major Fissure (N=208) | |||||||
| FCS | CVneg | CVpos | Sens | Spec | PPV | NPV | Number of Chartis Needed* |
| >80 | 85.3% | 14.7% | 27.5 | 98.8 | 85.3 | 100.0 | 6.8 |
| >83 | 86.1% | 13.9% | 32.5 | 99.4 | 86.1 | 92.9 | 7.2 |
| >85 | 86.3% | 13.7% | 35.0 | 97.6 | 86.3 | 77.8 | 7.3 |
| >90 | 88.2% | 11.8% | 45.0 | 97.6 | 88.2 | 81.8 | 8.5 |
| >93 | 89.9% | 10.1% | 55.0 | 95.2 | 89.9 | 73.3 | 9.9 |
| >95 | 91.1% | 8.9% | 62.5 | 91.7 | 91.1 | 64.1 | 11.3 |
| >96 | 92.7% | 7.3% | 70.0 | 90.5 | 92.7 | 63.6 | 13.7 |
| >97 | 93.5% | 6.5% | 75.0 | 85.7 | 93.5 | 55.6 | 15.4 |
| >98 | 93.7% | 6.3% | 77.5 | 79.8 | 93.7 | 47.7 | 15.9 |
| >99 | 93.8% | 6.2% | 80.0 | 72.0 | 93.8 | 40.5 | 16.1 |
| 100 | 92.8% | 7.2% | 82.5 | 53.6 | 92.8 | 29.7 | 13.9 |
Notes: Statistics per fissure and fissure completeness score regarding the sensitivity, specificity, positive and negative predictive value. Number of Chartis needed*: Number of Chartis measurements needed to identify one additional patient with collateral ventilation while applying this FCS.
Abbreviations: FCS, fissure completeness score; CVpos, presence of collateral ventilation; CVneg, absence of collateral ventilation; sens, sensitivity; spec, specificity; PPV, positive predictive value; NPV, negative predictive value.