Table 4 Analysis of threshold and saturation effects
Outcomes | B (95% CI)P-value | |
|---|---|---|
FVC%pred | ||
Breakpoint (k) | 4.8 | |
< k-segment effect 1 | 3.44(1.44, 5.43)0.0007 | |
> k-segment effect 2 | -3.46(-10.52, 3.60)0.3370 | |
Log likelihood ratio | 0.076 | |
FEV1%pred | ||
Breakpoint (k) | 4.1 | |
< k-segment effect 1 | 7.73(3.10, 12.36)0.0011 | |
> k-segment effect 2 | 5.28(3.07, 7.49) < 0.0001 | |
Log likelihood ratio | 0.370 | |
FEF25–75%pred | ||
Breakpoint (k) | 4.8 | |
< k-segment effect 1 | 9.81(5.76, 13.85) < 0.0001 | |
> k-segment effect 2 | 20.65(6.33, 34.97)0.0047 | |
Log likelihood ratio | 0. 170 | |
FEV1/FVC%pred | 4.8 | |
Breakpoint (k) | ||
< k-segment effect 1 | 2.43(1.21, 3.65) < 0.0001 | |
> k-segment effect 2 | 7.45 (3.13, 11.78)0.0007 | |
Log likelihood ratio | 0.035 | |