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Slope of least squares regression line
| N-acetylcysteine (n = 25) | Placebo (n = 25) | |
| Likert Score | 0.16 (0.42) | 0.35 (0.45) |
| FEV1 % predicted | 0.001 (0.015) | 0.019 (0.019) |
| Sa02 | 0.40 (0.89) | 0.88 (1.43) |
Mean and standard deviations for slopes of the least square regression lines for the effects of NAC and placebo on Likert scores for breathlessness, FEV1 % predicted and SaO2. There were no significant differences between NAC and placebo.
