| | | | | Cohen's kappa |
| | Klement (1) | ECCS (2) | NHANES III (3) | 1-2 | 2-3 | 1-3 |
| Norm: FEV1/FVC≥0.7; FVC>80%Pred; FVC≥LLN |
| FEV1>80%Pred | 2978 (0.38) | 3146 (0.40) | 2383 (0.31) | 0.85 (0.83-0.87) | 0.66 (0.64-0.68) | 0.74 (0.73-0.76) |
| FEV1≥LLN | 3586 (0.46) | 3415 (0.44) | 2301 (0.30) | 0.86 (0.85-0.88) | 0.52 (0.50-0.54) | 0.46 (0.44-0.48) |
| Obstruction: FEV1/FVC<0.7 |
| FEV1≤80%Pred | 2765 (0.36) | 2710 (0.35) | 2855 (0.37) | 0.87 (0.84-0.90) | 0.74 (0.70-0.78) | 0.82 (0.78-0.85) |
| FEV1<LLN | 2506 (0.32) | 2508 (0.32) | 2836 (0.36) | 0.91 (0.90-0.93) | 0.55 (0.51-0.59) | 0.55 (0.51-0.59) |
| Restriction: FEV1/FVC≥0.7 |
| FVC≤80%Pred | 1247 (0.16) | 1089 (0.14) | 2035 (0.26) | 0.85 (0.83-0.87) | 0.56 (0.54-0.58) | 0.64 (0.62-0.66) |
| FVC<LLN | 784 (0.10) | 921 (0.12) | 2160 (0.28) | 0.87 (0.85-0.89) | 0.44 (0.42-0.46) | 0.38 (0.36-0.40) |
| Mixed |
| %Pred | 789 (0.10) | 834 (0.11) | 506 (0.06) | | | |
| LLN | 903 (0.12) | 935 (0.12) | 482 (0.06) | | | |