Table 2 Annual Decline in Pulmonary Function calculated from the mean of all 5-year paired observations, and by linear regression over 15 years in the 200 subjects with all four observations
From: The Darlington and Northallerton Long Term Asthma Study: pulmonary function
Annual Decline | n | Actual FEV1 l. | Best FEV1 l. | Best FVC l. | ||
|---|---|---|---|---|---|---|
Males | Over 5 Years | All Subjects | 776 | 41.0 (34.7–47.3) | 42.9 (37.5–48.3) | 63.1 (55.7–71.2) |
Never smokers | 256 | 34.2 (22.2–46.2) | 33.4 (22.7–44.1) | 49.2 (35.6–62.8) | ||
Over 15 Years | 85 | 46.7 (38.7–54.7) | - | 64.7 (54.6–74.8) | ||
Females | Over 5 Years | All Subjects | 848 | 28.9 (23.2–34.6) | 34.4 (29.8–39.0) | 45.8 (40.0–51.6) |
Never smokers | 375 | 28.7 (22.4–38.8) | 30.6 (22.2–35.2) | 45.2 (36.4–54.0) | ||
Over 15 Years | 115 | 24.7 (14.8–31.2) | - | 44.6 (37.9–51.3) | ||