Table 2: Measured and predicted (by ECSC,GLI and current study’s equations) FEV1, FVC values along with the corresponding FEV1/FVC (%) ratios for a) the group of healthy individuals and b) COPD patients.

a)
All subjects
(N=500)
Men
(N = 239)
Women
(N = 261)
p-value
Mean (SD) Mean (SD) Mean (SD)
Measured values
FEV1 3.20 (0.86) 3.75 (0.73) 2.70 (0.63) <0.001
FVC 3.83 (1.08) 4.55 (0.89) 3.17 (0.76) <0.001
FEV1/FVC 84.26 (8.06) 82.75 (6.90) 85.63 (8.79) <0.001
Predicted (ECSC equations)
FEV1 3.14 (0.83) 3.70 (0.63) 2.62 (0.62) <0.001
FVC 3.78 (1.00) 4.56 (0.67) 3.06 (0.66) <0.001
FEV1/FVC 79.34 (3.09) 78.72 (2.84) 79.90 (3.21) <0.001
Predicted (GLI equations)
FEV1 3.33 (0.84) 3.90 (0.67) 2.80 (0.59) <0.001
FVC 4.13 (0.99) 4.88 (0.74) 3.44 (0.64) <0.001
FEV1/FVC 80.85 (2.97) 80.01 (2.77) 81.61 (2.94) <0.001
Predicted (Study equations)
FEV1 3.20 (0.79) 3.75 (0.62) 2.70 (0.56) <0.001
FVC 3.80 (0.97) 4.52 (0.72) 3.14 (0.65) <0.001
FEV1/FVC 84.26 (2.46) 82.75 (1.14) 85.63 (2.53) <0.001
b)
All subjects
(N=124)
Men
(N = 84)
Women
(N = 40)
p-value
Mean (SD) Mean (SD) Mean (SD)
Measured values
FEV1 1.48 (0.74) 1.60 (0.76) 1.22 (0.64) 0.008
FVC 2.52 (1.14) 2.79 (1.15) 1.96 (0.90) <0.001
FEV1/FVC 57.90 (10.63) 56.47 (11.39) 60.89 (8.14) 0.030
Predicted (ECSC equations)
FEV1 2.78 (0.71) 3.10 (0.54) 2.10 (0.51) <0.001
FVC 3.48 (0.88) 3.95 (0.58) 2.51 (0.55) <0.001
FEV1/FVC 76.31 (2.47) 75.93 (2.31) 77.09 (2.65) <0.001
Predicted (GLI equations)
FEV1 2.95 (0.70) 3.26 (0.57) 2.30 (0.48) <0.001
FVC 3.78 (0.86) 4.20 (0.65) 2.91 (0.53) <0.001
FEV1/FVC 78.16 (2.14) 77.59 (1.93) 79.35 (2.08) <0.001
Predicted (Study equations)
FEV1 2.86 (0.68) 3.17 (0.55) 2.23 (0.46) <0.001
FVC 3.50 (0.83) 3.90 (0.60) 2.65 (0.54) <0.001
FEV1/FVC 82.62 (1.88) 81.64 (0.91) 84.69 (1.72) <0.001

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