Table 1 Baseline demographics for the total cohort and split by smoking status
From: Rate of progression of CT-quantified emphysema in male current and ex-smokers: a follow-up study
Total n = 3,670 | Current smoker n= 2,056 | Quitted <1 year n=284 | Quitted ≥1 – <5 years n=711 | Quitted ≥5years n=619 | |
|---|---|---|---|---|---|
Age | 59.8 (5.4) | 58.9 (4.9) | 59.8 (5.3) | 60.4 (5.5) | 62.1 (6.2) |
height (cm) | 178 (7) | 178 (7) | 179 (7) | 178 (7) | 177 (7) |
FEV 1 /FVC | 72.2 (9.4) | 72.8 (9) | 72.8 (9.1) | 71.8 (10.2) | 71.9 (9.4) |
FEV 1 [L] | 3.4 (0.73) | 3.4 (0.8) | 3.4 (0.7) | 3.5 (0.8) | 3.4 (0.7) |
FEV 1 [%] | 98.5 (18.5) | 99.9 (20) | 100 (18) | 97.1 (19.4) | 97.6 (17.9) |
Packyears | 40.8 (17.9) | 40.0 (16.4) | 41.0 (17.5) | 43.1 (20.2) | 40.6 (19.5) |
observation time (years)* | 3.0 (2.9 – 3.1) | 3.0 (2.9-3.1) | 3.0 (2.9-3.1) | 3.0 (2.9-3.1) | 3.0 (2.9-3.1) |
GOLD classification | |||||
normal (%) | 65.5 | 63.2 | 65.5 | 68.8 | 69.1 |
stage I (%) | 22.0 | 23.4 | 20.4 | 20.8 | 19.2 |
stage II (%) | 10.9 | 11.6 | 12.0 | 9.1 | 10.3 |
stage III (%) | 1.6 | 1.8 | 2.1 | 1.3 | 1.5 |
stage IV (%) | 0.1 | 0.1 | 0 | 0 | 0 |
Presence of respiratory symptoms | |||||
cough (%) | 32.0 | 46.0 | 24.9 | 14.5 | 10.7 |
wheezing (%) | 23.8 | 33.0 | 20.9 | 13.1 | 7.4 |
dyspnea (%) | 29.5 | 34.4 | 29.5 | 23.3 | 20.8 |
mucus (%) | 30.0 | 39.6 | 26.0 | 17.8 | 15.2 |
lung volume <-950 HU (%)* | 8.8 (5.1 – 14.1) | 6.8 (3.9 – 11.5) | 10.5 (6.7 – 15.2) | 11.3 (7.4 – 17.2) | 11.9 (7.5 – 16.9) |
lung volume <-910 HU (%)* | 35.2 (24.1 – 46.0) | 30.2 (20.1 – 41.9) | 38.4 (28.7 – 47.9) | 40.9 (30.6 – 50.7) | 41.2 (31.6 – 51.4) |
perc15 (HU) | −935 (19) | −930 (21) | −939 (16) | −942 (18) | −942 (17) |