No COPD (n = 118) | Mild COPD (n = 33) | Moderate COPD (n = 83) | p | |
Baseline | ||||
Absolute FEV1 | 2581(663) | 2492(576) | 1960(419) | 0.001 |
Percentage FEV1 | 99.6(14.1) | 94.3(13.6) | 66.9(8.9) | 0.001 |
Year 1 | ||||
Absolute FEV1 | 2156(608) | 2097(527) | 1754(389) | 0.001 |
Percentage FEV1 | 84.5(18.7) | 79.7(17.8) | 61.0(11.2) | 0.035 |
Δprevious year (%) | -15.3 | -14.6 | -5.9 | 0.035 |
Year 2 | ||||
Absolute FEV1 | 2065(581) | 2142(677) | 1623(444) | 0.009 |
Percentage FEV1 | 83.5(18.7) | 79.5(19.5) | 57.8(12) | 0.014 |
Δprevious year (%) | 1.2 | -0.2 | -3.2 | 0.014 |
Year 3 | ||||
Absolute FEV1 | 2058(609) | 1981(428) | 1533(568) | 0.004 |
Percentage FEV1 | 82.4(16) | 76.6(17.1) | 54.5(13.2) | 0.533 |
Δprevious year (%) | -2.1 | -2.9 | -3.3 | 0.533 |