Table 4 Comparison of FEV 1 % and FVC% of the non-Korean equations with Choi's equation by age group
From: Discordance in Spirometric Interpretations Based on Korean and Non-Korean Reference Equations
Age group | Choi | NHANES III | Knudson | Morris | ||||
|---|---|---|---|---|---|---|---|---|
Value | Value | Difference from Choi (95% CI) | Value | Difference from Choi (95% CI) | Value | Difference from Choi (95% CI) | ||
FEV1% | 20-39 | 97.5 ± 10.0 | 94.0 ± 10.0 | -1.8 ± 1.0† | 97.6 ± 10.6 | -5.3 ± 3.7† | 117.5 ± 13.0 | -25.2 ± 4.1† |
(-1.9 - -1.6) | (-5.7 - -4.9) | (-25.7 - -24.8) | ||||||
40-49 | 98.9 ± 11.3 | 97.8 ± 11.2 | -4.3 ± 1.0† | 104.7 ± 13.2 | -11.1 ± 4.6† | 126.9 ± 14.5 | -33.3 ± 4.2† | |
(-4.4 - -4.1) | (-11.7 - -10.5) | (-33.8 - -32.7) | ||||||
≥ 50 | 97.6 ± 11.3 | 97.5 ± 15.5 | -6.6 ± 1.7† | 106.3 ± 17.6 | -15.4 ± 6.1† | 131.4 ± 21.2 | -40.5 ± 7.4† | |
(-6.8 - -6.4) | (-16.1 - -14.7) | (-41.4 - -39.7) | ||||||
Total | 97.6 ± 11.3 | 96.3 ± 12.7 | -4.2 ± 2.5† | 102.7 ± 11.8 | -10.5 ± 6.5† | 125.1 ± 17.8 | -32.9 ± 8.5† | |
(-4.4 - -4.0) | (-11.0 - -10.1) | (-33.5 - -32.4) | ||||||
FVC% | 20-39 | 97.5 ± 10.0 | 95.3 ± 9.6 | 2.1 ± 2.1† | 101.4 ± 10.4 | -3.9 ± 4.3† | 97.1 ± 10.0 | 0.4 ± 2.5* |
(1.9 - 2.3) | (-4.4 - -3.4) | (0.1 - 0.6) | ||||||
40-49 | 98.9 ± 11.3 | 99.6 ± 11.3 | -0.8 ± 1.8† | 111.0 ± 13.5 | -12.1 ± 5.2† | 102.5 ± 11.6 | -3.6 ± 1.9† | |
(-1.0 - -0.5) | (-12.8 - -11.4) | (-3.9 - -3.4) | ||||||
≥ 50 | 97.6 ± 11.3 | 102.3 ± 13.0 | -5.6 ± 3.2† | 118.1 ± 16.2 | -21.4 ± 8.2† | 104.7 ± 13.2 | -8.1 ± 2.6† | |
(-6.0 - -5.3) | (-22.4 - -20.5) | (-8.3 - -7.8) | ||||||
Total | 97.6 ± 11.3 | 99.0 ± 11.7 | -1.5 ± 4.1† | 110.1 ± 15.3 | -12.5 ± 9.7† | 101.4 ± 12.1 | -3.8 ± 4.3† | |
(-1.7 - -1.2) | (-13.1 - -11.8) | (-4.1 - -3.5) | ||||||