Number and proportion of trial participants in each group who failed to regain their pre-exacerbation FEV1, with relative risk (95% CI) due to hypertonic saline use
| Characteristic | Hypertonic saline (n=67) | Control (n=65) | Relative risk (95% CI) |
|---|---|---|---|
| Failed to regain pre-exacerbation FEV1 by discharge, n (%) | 17 (25) | 28 (43) | 0.59 (0.36 to 0.96) |
Pre-exacerbation FEV1 is defined as the best forced expiratory volume in 1 s recorded as an outpatient in the 6 months before the exacerbation.