Table 3. Comparisons with other previous reference values derived from Chinese adults.
| Reference | FVC (L) | FEV1 (L) | FEV1/FVC% | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 years | 40 years | 60 years | 20 years | 40 years | 60 years | 20 years | 40 years | 60 years | |||
| Males | |||||||||||
| The present study | 4.64 | 4.48 | 3.98 | 4.09 | 3.71 | 3.16 | 87.4 | 83.0 | 79.5 | ||
| Wu et al. (20) | 4.94 (6.4) | 4.45 (−0.6) | 3.97 (−0.2) | 4.11 (0.5) | 3.63 (−2.0) | 3.15 (0.2) | 84.5 (−3.3) | 81.4 (−1.9) | 78.3 (−1.5) | ||
| Ip et al. (16) | 4.43 (−4.6) | 4.04 (−9.9) | 3.66 (−8.0) | 3.85 (−5.7) | 3.34 (−9.8) | 2.83 (−10.1) | 89.1 (1.9) | 83.2 (0.2) | 77.2 (−2.8) | ||
| Pan et al. (17) | 4.75 (2.4) | 4.26 (−5.0) | 3.77 (−5.2) | 4.21 (3.1) | 3.58 (−3.4) | 2.95 (−6.5) | 89.9 (2.9) | 84.3 (1.6) | 78.7 (−0.9) | ||
| Females | |||||||||||
| The present study | 3.42 | 3.39 | 2.96 | 3.08 | 2.80 | 2.33 | 90.4 | 83.1 | 78.8 | ||
| Wu et al. (20) | 3.84 (11.4) | 3.51 (3.7) | 3.18 (7.7) | 3.34 (8.7) | 2.98 (6.5) | 2.63 (12.9) | 86.6 (−4.2) | 84.2 (1.3) | 81.8 (3.8) | ||
| Ip et al. (16) | 3.24 (−6.1) | 2.94 (−13.2) | 2.64 (−10.7) | 2.85 (−7.4) | 2.45 (−12.5) | 2.05 (−11.7) | 89.8 (−0.7) | 83.5 (0.5) | 77.3 (−1.9) | ||
| Pan et al. (17) | 3.42 (−0.7) | 3.07 (−9.2) | 2.73 (−7.7) | 3.08 (0.0) | 2.62 (−6.4) | 2.17 (−6.6) | 91.2 (0.9) | 85.4 (2.8) | 79.5 (0.9) | ||
Data are presented as predicted values in male adults with 170 cm in height and 65 kg in weight, while in female adults with 160 cm in height and 55 kg in weight (% difference compared with the present study). FVC, forced vital capacity; FEV1, forced expiratory volume in 1 second.