From: Increased oxidative stress in asymptomatic current chronic smokers and GOLD stage 0 COPD
Variable | Never-smokers | Ex-smokers | Healthy smokers | Stage 0 COPD |
---|---|---|---|---|
Number | 11 | 11 | 13 | 9 |
Age (yr) | 59 (50–72) | 56 (51–64) | 53 (42–61) | 64 (57–70) |
Sex (F/M) | 2/9 | 2/9 | 3/10 | 2/7 |
BMI | 27 (23–32) | 26 (21–31) | 27 (17–35) | 29 (26–35) |
Post bronchodilator | ||||
FVC (l) * | 4.6 (3.7–5.7) | 5.0 (4.7–5.5) | 4.7 (2.1–6.7) | 3.4 (2.8–4.0) |
FVC (% predicted) * | 98 (81–110) | 102 (101–103) | 95 (65–122) | 82 (67–104) |
FEV1 (l) * | 3.6 (3.1–4.2) | 4.4 (4.1–4.6) | 3.8 (1.7–5.3) | 2.6(2.1–3.0) |
FEV1 (% predicted) * | 97 (81–113) | 111 (109–113) | 96 (63–122) | 77 (62–100) |
FEV1/FVC | 79 (75–85) | 87 (83–89) | 81 (73–87) | 76(71–83) |
MEF 50 (% predicted) | 87 (67–117) | 131 (107–174) | 85 (38–112) | 57 (35–77) |
MEF 25 (% predicted)* | 98 (33–149) | 151 (124–194) | 87 (45–162) | 53 (16–96) |
Diffusion capacity (%)† | 94 (85–106) | 98 (87–111) | 86 (69–109) | 80 (64–99) |