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Table 2 Spirometric parameters

From: Heterogeneous pattern of differences in respiratory parameters between elderly with either good or poor FEV1

Parameter UED group LED group Mean difference (UED-LED) 95% CI of difference p-value for difference
Number Mean ± SD Median (25%; 75%) Number Mean ± SD Median (25%; 75%) Lower Upper  
FEV1%pred 72 124.9 ± 10.3 124.6 (116.9; 131.4) 51 85.5 ± 10.9 85.1 (77.1; 91.4) 39.4 35.5 43.3 < 0.001
FVC %pred 72 127.2 ± 10.9 129.8 (119.3; 134.4) 51 101.8 ± 13.0 102.0 (95.6; 108.8) 25.4 21.0 29.8 < 0.001
FEV1/FVC %pred 72 97.5 ± 6.2 97.7 (92.7; 102.3) 51 83.9 ± 10.4 84.4 (78.3; 91.0) 13.6 10.4 16.9 < 0.001
FEF25–75%pred 72 124.7 ± 34.8 120.4 (99.3; 148.8) 49 56.1 ± 23.6 49.2 (39.5; 65.0) 69.8 59.3 80.2 < 0.001
FEF75%pred 72 168.0 ± 66.3 159.7 (118.3; 204.9) 49 74.1 ± 39.5 65.5 (49.2; 86.8) 93.9 74.8 113.0 < 0.001
FEV1 z-score 72 1.465 ± 0.587 1.433 (0.991; 1.862) 51 −0.819 ± 0.610 −0.847 (−1.288; −0.527) 2.284 2.068 2.500 < 0.001
FVC z-score 72 1.514 ± 0.579 1.629 (1.124; 1.889) 51 0.101 ± 0.728 0.112 (− 0.270; 0.524) 1.413 1.180 1.647 < 0.001
FEV1/FVC z-score 72 −0.221 ± 0.579 −0.200 (− 0.654; 0.230) 51 −1.389 ± 0.857 −1.349 (− 1.953; − 0.798) 1.168 0.911 1.424 < 0.001
FEF25–75 z-score 72 0.479 ± 0.702 0.451 (− 0.014; 0.990) 49 − 1.229 ± 0.721 −1.343 (− 1.721; − 0.955) 1.709 1.448 1.969 < 0.001
FEF75 z-score 72 0.697 ± 0.614 0.752 (0.274; 1.108) 49 − 0.658 ± 0.750 −0.659 (− 1.147; − 0.241) 1.355 1.109 1.602 < 0.001
FEV1/FVC 72 0.749 ± 0.048 0.752 (0.713; 0.785) 51 0.642 ± 0.079 0.652 (0.595; 0.697) 0.107 0.082 0.132 < 0.001
  1. Reference values were calculated according to Quanjer et al. [1]
  2. p-values below 0.05 are shown in bold