| NEHI | IESM | |
| Tachypnoea | 6/6 | 10/10 |
| Retractions | 5/6 | 7/10 |
| Crackles | 4/6 | 5/10 |
| Hypoxaemia | 6/6 | 8/10 |
| Poor growth | 2/6 | 7/10 |
| Respiratory failure | 0/6 | 5/10 |
| CT* findings | ||
| Diffuse GGO | 1/6 | 4/6 |
| Patchy GGO | 6/6 | 2/6 |
| Septal thickening | 0/6 | 4/6 |
*Available studies from the first 18 months of life.
GGO, ground-glass opacification; IESM, inborn errors of surfactant metabolism; NEHI, neuroendocrine cell hyperplasia of infancy.