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. 2017 Dec 19;13:11–27. doi: 10.2147/COPD.S144136

Table S4.

General linear model for BPIFB1 protein expression

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:

a

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.