Table S4.
Parameter | B | Standard error | t | Significance |
---|---|---|---|---|
Intercept | −2.249 | 1.354 | −1.660 | 0.101 |
Age | 0.014 | 0.02 | 0.679 | 0.499 |
Gender | ||||
Male | −0.316 | 0.373 | −0.848 | 0.399 |
Female | 0a | |||
Inhaled corticosteroids | ||||
Inhaled corticosteroid use | 0.233 | 0.459 | 0.507 | 0.614 |
No inhaled corticosteroid use | 0a | |||
Smoking status | ||||
Yes | 0.535 | 0.358 | 1.494 | 0.139 |
No (ex-smoker or never-smoker) | 0a | |||
COPD status | ||||
COPD III–IV | 1.155 | 0.689 | 1.675 | 0.098 |
COPD II | 1.412 | 0.403 | 3.502 | 0.001 |
Without COPD | 0a |
Notes:
Reference parameter is set to 0. Linear regression analysis, where the natural logarithm of the protein expression of BPIFB1 is designated as the dependent variable; gender as a fixed factor; COPD status, smoking status, and inhaled corticosteroids as random factors; and age as a covariate.
Abbreviation: COPD, chronic obstructive pulmonary disease.