Table 5: The cut off values of NT-proBNP wean and its qualification as tools.
| NT-proBNP (pg/ml) | Test (%) | DIFFICULT | PROLONG | REINTUBATION | Suspicious Cardiac compensation | Suspicious Pulmonary compensation |
| 7000 | Sensitivity | 24.2 (11.1-42.3) | 37.5 (8.5-75.5) | 16.7 (0.4-64.1) | 29.0 (18.2-41.9) | 36.0 (22.9-50.8) |
| Specificity | 83.2 (74.4-89.9) | 82.5 (74.7-88.7) | 81.6 (73.7-87.9) | 91.4 (82.3-96.8) | 92.7 (84.8-97.3) | |
| Accuracy | 68.7 (60.1-76.4) | 79.9 (72.1-86.3) | 78.6 (70.6-85.3) | 62.1 (53.3-70.4) | 71.2 (62.7-78.8) | |
| 5000 | Sensitivity | 27.3 (13.3-45.2) | 62.5 (24.5-91.5) | 16.7 (0.4-64.1) | 35.5 (23.7-48.7) | 38.0 (24.7-52.8) |
| Specificity | 75.3 (65.7-83.3) | 75.4 (66.9-82.6) | 74.4 (65.8-81.8) | 84.3 (73.6-91.9) | 82.9 (73.0-90.3) | |
| Accuracy | 63.4 (54.7-71.6) | 73.1 (64.8-80.4) | 71.8 (63.2-79.3) | 61.4 (52.5-69.7) | 65.9 (57.2-72.9) | |
| 3000 | Sensitivity | 51.5 (33.5-69.2) | 62.5 (24.5-91.5) | 66.7 (22.8-95.7) | 54.8 (41.5-67.5) | 56.0 (41.2-70.0) |
| Specificity | 60.4 (50.1-69.9) | 58.7 (49.6-67.4) | 59.2 (50.1-67.9) | 70.0 (57.9-80.4) | 67.1 (55.8-77.1) | |
| Accuracy | 58.2 (49.4-66.7) | 58.9 (50.1-67.4) | 59.54 (50.6-68.1) | 62.9 (54.1-71.1) | 62.9 (54.1-71.1) |
Note: Values are in mean (95% CI), %.