Baseline characteristics and mean bronchoalveolar lavge fluid pepsin values of the two groups
| Cases (n=31) | Controls (n=7) | p Value | |
| Mean (range) age (years) | 10.4 (0.4–17.7) | 8.3 (3.7–15.1) | 0.51 |
| Gender (M/F) | 20/11 | 3/4 | 0.30 |
| Mean±SD pepsin levels (ng/ml) | 24.4±27.4 | 4.3±4 | 0.03 |
Differences in individual means were calculated by Student t test for continuous data and χ2 for categorical data.