Number (%) of control subjects according to clinical category
| Control subjects | ||
|---|---|---|
| Signs and symptoms | n | % |
| Failure to thrive + GI obstruction, diarrhoea, rectal prolapse | 70 | 45 |
| Respiratory | 46 | 30 |
| Failure to thrive + respiratory | 20 | 13 |
| Family history of CF (well) | 9 | 6 |
| Positive screening test (well) | 5 | 3 |
| Prolonged jaundice | 2 | 1.5 |
| Failure to thrive + family history | 2 | 1.5 |