Multiple regression analysis of HRCT parameters using age and pulmonary function tests in asthmatic subjects (n=45)
| MLD (HU) (R2 = 0.0524) | RA950 (%) (R2 = 0.611) | ||||||
| Predictor variable | Regression coefficient | 95% CI | p value | Regression coefficient | 95% CI | p value | |
| Age (years) | –0.410 | –0.773 to –0.047 | 0.0279 | 0.159 | 0.007 to 0.310 | 0.0411 | |
| FVC (% pred) | – | – | – | – | – | – | |
| FEV1 (% pred) | 0.503 | 0.289 to 0.717 | <0.0001 | –0.272 | –0.361 to –0.183 | <0.0001 | |
| FEV1/FVC (%) | – | – | – | – | – | – | |
| FEF25–75(% pred) | – | – | – | – | – | – | |
| TLC (% pred) | –0.366 | –0.673 to –0.059 | 0.0207 | – | – | – | |
| FRC (% pred) | – | – | – | 0.126 | 0.030 to 0.221 | 0.0112 | |
| RV (% pred) | – | – | – | – | – | – | |
| RV/TLC (%) | – | – | – | – | – | – | |
| Tlco (% pred) | – | – | – | – | – | – | |
| Tlco/VA (% pred) | – | – | – | – | – | – | |
R 2 = coefficient of determination.
Missing values indicate that independent variables were not statistically significant.
Abbreviations as in footnote to tables 1 and 2.