Table 2.
Baseline characteristics of the subjects
| N-Acetylcysteine (n = 25) | Placebo (n = 25) | |
| Gender Male/Female | 11/14 | 19/6 |
| Age Years (SD) | 73.6 (7.8) | 73.0 (8.2) |
| Smoking History Pack Years (SD) | 44.4 (36.2) | 53.7 (36.8) |
| FEV1 % predicted (SD) | 22 (10) | 24 (12) |
| VC % predicted (SD) | 56 (18) | 64 (22) |
| SaO2 % (SD) | 90.2 (4.0) | 90.4 (2.7) |
| Breathlessness Likert Score (IQ range) | 4 (3–6) | 4 (3–5) |
Values are shown as mean and standard deviation except for Likert scores that are shown as median and interquartile range. There were no statistically significant differences between the two groups for any of the measures.