Binary logistic regression analysis.

The presence of detectable, secreted CEACAM8 in BALF was categorized as positive or negative and used as the outcome variable and the different categories of granulocyte count in the human BALF: normal, moderately elevated and highly elevated were used as predictor variables. The probability of having detectable secreted CEACAM8 in BALF related to one category or a combination of categories of the granulocyte count was then evaluated.