Table 3 Mean^a (95 % CI) post-bronchodilator lung function in subjects with COPD by vehicle density per 24 h within a 200 m buffer

81.4 (75.6–87.2)

99.5 (92.4–106.5)

64.6 (61.9–67.2)

8.4 (6.5–10.3)

75.7 (70.7–80.7)

93.7 (87.7–99.8)

62.1 (59.8–64.3)

8.9 (7.1–10.7)

70.9* (66.5–75.3)

93.8 (88.4–99.1)

59.8* (57.8–61.8)

10.9 (8.9–13.0)

80.3 (73.6–87.0)

95.6 (89.6–101.7)

64.1 (60.6–67.7)

8.5 (6.3–10.8)

78.0 (73.0–83.1)

94.4 (89.8–99.0)

62.2 (59.6–64.9)

8.8 (6.9–10.6)

71.9* (66.7–77.1)

93.2 (88.5–98.0)

58.9* (56.1–61.6)

10.6 (7.9–13.3)

80.5 (69.7–91.2)

103.8 (86.7–120.9)

64.6 (60.6–68.6)

8.2 (4.6–11.7)

69.7 (55.8–83.6)

93.6 (71.5–115.7)

61.9 (56.7–67.0)

9.4 (4.5–14.3)

69.1# (61.4–76.8)

94.9 (82.7–107.2)

61.3 (58.5–64.2)

11.5 (8.3–14.6)