Table S1.
Linear multivariate regression analysis: association between SGRQ total-score and age and nicotine consumption adjusted for sex, augmentation therapy and occupational dust exposure
| Variable | Unstandardized coefficient, B | Standardized coefficient, β | 95% CI | P-value |
|---|---|---|---|---|
| Age (years) | 0.50 | 0.30 | 0.39 to 0.61 | <0.001 |
| Sex, female | 2.06 | 0.05 | −0.65 to 4.78 | 0.136 |
| Nicotine consumption (pack-years) | 0.29 | 0.24 | 0.21 to 0.37 | <0.001 |
| Augmentation therapy | 10.59 | 0.26 | 7.95 to 13.22 | <0.001 |
| Occupational dust exposure | 6.94 | 0.17 | 4.17 to 9.71 | <0.001 |
| Dependent variable: SGRQ total-score |
Abbreviations: CI, confidence interval; SGRQ, St George’s Respiratory Questionnaire.