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Table 2 Comparison of FEV 1 % and FVC% by the Korean equations

From: Discordance in Spirometric Interpretations Based on Korean and Non-Korean Reference Equations

  Age group Choi Lee Mean difference (95% CI)
Measured/Calculated 40-49 93.6 ± 10.6 95.7 ± 10.8 -2.1 ± 1.1*
     (-2.3 - -2.0)
FEV1(%) ≥ 50 92.1 ± 11.9 92.8 ± 14.8 -1.9 ± 1.5*
     (-2.1 - -1.7)
  Total 92.1 ± 11.9 94.1 ± 13.3 -2.0 ± 1.3*
     (-2.1 - -1.9)
Measured/Calculated 40-49 98.9 ± 11.3 101.3 ± 11.4 -2.4 ± 1.9*
     (-2.6 - -2.1)
FVC(%) ≥ 50 97.6 ± 11.3 101.2 ± 12.8 -4.5 ± 2.0*
     (-4.7 - -4.2)
  Total 97.6 ± 11.3 101.2 ± 12.2 -3.5 ± 2.2*
     (-3.7 - -3.3)
  1. * p-value < 0.01 by paired t-test.