Table 5. Parameter estimates from simple linear regression analysis of absolute values of forced expiratory volume in 1 second (FEV1) in relation to the scoring of radiographic abnormalities and other factors.
|
FEV1 (L)
|
|||
|---|---|---|---|
| Variables | Parameter estimates (95% CI) | P value | Adjusted R-squared |
| Scoring of radiographic abnormalities | -0.09 (-0.12 to -0.06) | 0.000 | 0.22 |
| Age | -0.02 (-0.03 to -0.01) | 0.000 | 0.1567 |
| Gender | -0.59 (-0.86 to -0.33) | 0.000 | 0.1291 |
| Height | 0.05 (0.04 to 0.07) | 0.000 | 0.2886 |
| Education (years of study) | 0.07 (0.04 to 0.09) | 0.000 | 0.1503 |
| Smoking status (former vs. never) | 0.48 (0.18 to 0.78) | 0.002 | 0.0656 |
| Pack-years of smoking | 0.00 (-0.09 to 0.09) | 0.963 | -0.0293 |
| Comorbidity | -0.08 (-0.20 to 0.04) | 0.215 | 0.215 |
| Time of the disease (days) | -0.00 (-0.00 to 0.00) | 0.073 | 0.0293 |
| MRC Dyspnea Scale | |||
| MRC 1 | -0.34 (-0.62 to -0.06) | 0.018 | 0.2029 |
| MRC 2 | -0.94 (-1.32 to -0.55) | 0.000 | |
| MRC 3 | -1.17 (-1.84 to -0.51) | 0.001 | |
| MRC 4 | -1.85 (-3.28 to -0.43) | 0.011 | |
| Oxygen pulse saturation | 0.07 (0.04 to 0.11) | 0.000 | 0.1279 |