Table 4. Linear analysis of the relationship between the MUC1 EC fragment level in induced sputum from COPD exacerbation and clinical parameters.
| Variables (MUC1) | Unstandardized coefficient (B) | Std. error | Standardized coefficient (Beta) | t | P value |
|---|---|---|---|---|---|
| Constant | 0.346 | 0.812 | – | 0.425 | 0.68 |
| FEV1/FVC | −0.034 | 0.007 | −0.701 | −4.684 | 0.001 |
| Age | 0.021 | 0.009 | 0.341 | 2.276 | 0.046 |
MUC1, mucin 1; EC, extracellular; COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in one second; FVC, forced vital capacity.