Analysis of continuous variables
| Continuous variable measured | Cases | Controls | Difference | Paired t test | p value | 95% CI (for difference) |
|---|---|---|---|---|---|---|
| S-K score (mean change) | −8.18 | −4.32 | −3.86 | −1.57 | 0.15 | −9.4 to 1.6 |
| N score (mean change) | 4.08 | 1.88 | 2.21 | 2.06 | 0.06 | −0.2 to 4.6 |
| FEV1 (mean change) | −0.03 | −0.21 | 0.17 | 0.48 | 0.65 | −0.7 to 1.0 |
| FVC (mean change) | 0.22 | 0.18 | 0.04 | 0.09 | 0.93 | −1.1 to 1.2 |
| Nutritional status (mean change) | 1.23 | 0.77 | 0.46 | 0.43 | 0.68 | −2.0 to 2.9 |
| Mean no. intravenous antibiotic courses | 6.64 | 2.86 | 3.79 | 3.86 | 0.002 | 1.7 to 5.9 |
S-K score = Shwachman-Kulczycki score; N score = Northern radiographic score; FEV1 = forced expiratory volume in one second; FVC = forced vital capacity.