| Test | Group 1 (n = 199) | Group 2 (n = 41) | Group 3 (n = 240) | ||||||
| Actual | ECCS predicted | New predicted | Actual | New predicted† | New predicted 25 years‡ | Actual | ECCS predicted§ | New predicted | |
| FEV1(L) | 4.56(0.62) | 4.24(0.34)* | 4.56(0.38) | 4.73(0.79) | 4.81(0.42) | 4.79(0.37)** | 4.59(0.65) | 4.29(0.36)* | 4.59(0.42) |
| FVC(L) | 5.62(0.75) | 5.09(0.43)* | 5.62(0.48) | 5.69(1.07) | 5.74(0.55) | 5.80(0.48)** | 5.62(0.84) | 5.14(0.44)* | 5.62(0.55) |
Values presented as mean (SD).
*p<0.01 compared to actual values; **p<0.01 compared to “new predicted” value.
†Obtained using equations from Group 3.
‡Obtained using equations from Group 1 and extrapolating back using an input age of 25 years.
§Input age of 25 years used for subjects 18–25 years.