Table 3 Meana (95 % CI) post-bronchodilator lung function in subjects with COPD by vehicle density per 24 h within a 200 m buffer
Post-bronchodilator [Mean (95 % CI)] | ||||
|---|---|---|---|---|
FEV1 % predicted | FVC % predicted | FEV1: FVC (%) | FEV1 reversibility (%) | |
All subjects (n = 221) | ||||
low | 81.4 (75.6–87.2) | 99.5 (92.4–106.5) | 64.6 (61.9–67.2) | 8.4 (6.5–10.3) |
medium | 75.7 (70.7–80.7) | 93.7 (87.7–99.8) | 62.1 (59.8–64.3) | 8.9 (7.1–10.7) |
high | 70.9* (66.5–75.3) | 93.8 (88.4–99.1) | 59.8* (57.8–61.8) | 10.9 (8.9–13.0) |
Males (n = 150) | ||||
low | 80.3 (73.6–87.0) | 95.6 (89.6–101.7) | 64.1 (60.6–67.7) | 8.5 (6.3–10.8) |
medium | 78.0 (73.0–83.1) | 94.4 (89.8–99.0) | 62.2 (59.6–64.9) | 8.8 (6.9–10.6) |
high | 71.9* (66.7–77.1) | 93.2 (88.5–98.0) | 58.9* (56.1–61.6) | 10.6 (7.9–13.3) |
Females (n = 71) | ||||
low | 80.5 (69.7–91.2) | 103.8 (86.7–120.9) | 64.6 (60.6–68.6) | 8.2 (4.6–11.7) |
medium | 69.7 (55.8–83.6) | 93.6 (71.5–115.7) | 61.9 (56.7–67.0) | 9.4 (4.5–14.3) |
high | 69.1# (61.4–76.8) | 94.9 (82.7–107.2) | 61.3 (58.5–64.2) | 11.5 (8.3–14.6) |