CFTR neonatal screening results, serum creatinine levels closest in time to newborn screening and sweat test chloride levels
| Patient | IRT (μg/l) | PAP (μg/l) | CFTR DNA | Creatinine (μmol/l) | Chloride (mmol/kg) |
| 1 | 79 | 6.4 | Negative | 115 | 25 |
| 2 | 71 | 2.0 | Negative | 426 | 7 |
| 3 | 113 | 1.3 | Negative | 94 | 10 |
| 4 | 65 | 2.6 | Negative | 195 | NA |
CFTR DNA, cystic fibrosis transmembrane conductance regulator DNA mutation analysis; IRT, immunoreactive trypsinogen; NA, not available; PAP, pancreatitis-associated protein.