Table 2.
Main characteristics of female and male subjects used to determine reference values of 6MWD (n = 530)
| Females n = 287 |
Males n = 243 |
|
|---|---|---|
| Age, years | ||
| Mean (s.d.) | 46.4 (10.9) | 47.1 (12.8) |
| Range | 21.2–75.8 | 21.2–77.8 |
| Height, cm | ||
| Mean (s.d.) | 163.0 (6.5) | 175.9 (6.7) |
| Range | 146.0–186.0 | 156.0–192.0 |
| Weight, Kg | ||
| Mean (s.d.) | 61.7 (9.5) | 78.6 (9.9) |
| Range | 41.0–106.0 | 57.0–107.0 |
| BMI | ||
| Mean (s.d.) | 23.2 (3.4) | 25.4 (2.8) |
| Range | 16.9–31.2 | 17.6–31.6 |
| Smoking habits, n (%) | ||
| Non smokers | 216 (75.5) | 137 (56.4) |
| Ex-smoker | 70 (24.5) | 106 (43.6) |
| Physically active, n (%) | 119 (41.5) | 112 (46.1) |
| 6MWD, m | ||
| Mean (s.d.) | 581.4 (66.5) | 608.7 (80.1) |
| Range | 383.0–800.0 | 410.0–875.0 |
| FEV1% predicted, % | ||
| Mean (s.d.) | 103.7 (12.4) | 104.5 (11.4) |
| Range | 77.3–166.9 | 80.6–159.9 |
| FEV1/FVC, % | ||
| Mean (s.d.) | 84.2 (6.1) | 82.7 (6.6) |
| Range | 70.1–103.7 | 66.9–103.8 |