Mortality odds ratios and 95% confidence intervals for COPD death, by survival interval, per 10% decrease in each spirometric index (univariate models)
| Case survived <10 years (n=48) | Case survived 10–14 years (n=50) | Case survived 15–19 years (n=45) | All case-control pairs (n=143) | |
| FVC | 2.61 (1.45 to 4.68) | 1.70 (1.23 to 2.34) | 1.95 (1.24 to 3.07) | 1.97 (1.55 to 2.50) |
| FEV1 | 4.65 (1.48 to 14.6) | 2.12 (1.36 to 3.30) | 1.61 (1.21 to 2.15) | 2.06 (1.61 to 2.63) |
| FEV1/FVC | 1.97 (1.35 to 2.88) | 4.77 (1.97 to 11.5) | 2.02 (1.33 to 3.08) | 2.36 (1.79 to 3.11) |
| FEF20–50 | 2.32 (1.28 to 4.20) | 1.83 (1.28 to 2.60) | 1.30 (1.11 to 1.52) | 1.55 (1.35 to 1.79) |
| FEF50–75 | 2.52 (1.34 to 4.72) | 1.96 (1.26 to 3.04) | 1.76 (1.25 to 2.48) | 1.98 (1.54 to 2.54) |
| FEF20–75 | 2.86 (1.36 to 6.03) | 2.66 (1.31 to 5.41) | 1.50 (1.19 to 1.90) | 1.90 (1.52 to 2.38) |
| FEF60–80 | 2.57 (1.39 to 4.78) | 1.63 (1.20 to 2.21) | 1.97 (1.32 to 2.95) | 1.93 (1.53 to 2.46) |
| FEF75–85 | 1.93 (1.27 to 2.92) | 1.50 (1.18 to 1.91) | 1.41 (1.14 to 1.75) | 1.54 (1.32 to 1.79) |
| FEF80–90 | 1.42 (1.12 to 1.79) | 1.47 (1.17 to 1.85) | 1.64 (1.20 to 2.24) | 1.50 (1.29 to 1.74) |
| FEF85–95 | 1.57 (1.18 to 2.10) | 1.23 (1.05 to 1.44) | 1.22 (0.98 to 1.51) | 1.31 (1.16 to 1.47) |
For abbreviations see footnote to table 2.