Table 1.
Main patient characteristics. The table shows the data presented as mean ± SD or median and [interquartile range], as appropriate.
| NRD (n = 15) |
MI (n = 15) |
SI (n = 15) |
p-Value | |
|---|---|---|---|---|
| Sex: male/female | 4/11 | 12/3 | 11/4 | 0.01 |
| Age (years) | 57 ± 9.7 | 68.9 ± 7.1 | 65.2 ± 9.4 | 0.00 |
| Smoking pack-years | 20 [15] | 30 [25] | 25 [20] | 0.743 |
| BMI, kg/m2 | 28 [5.7] | 28 [5] | 28.8 [5.9] | 0.981 |
|
mMRC dyspnea scale | ||||
| 0 (n) | 15 | 0 | 0 | 0.00 |
| 1 (n) | 0 | 13 | 4 | |
| 2 (n) | 0 | 1 | 3 | |
| 3 (n) | 0 | 0 | 6 | |
| 4 (n) | 0 | 0 | 1 | |
BMI: body mass index; MI: mild functional impairment; mMRC: modified Medical Research Council; NRD: non-respiratory disease control group; SI: severe functional impairment. The p-value was calculated with the chi-squared test, Student's t-test, Mann–Whitney U test or Fisher's exact test as appropriate (normal distribution or not).