Table 4.

Point scoring system for predicting the risk of being a case

Characteristic	Points assigned*
High A1AT levels (≥167 mg/dl)	4
Low and medium cholesterol levels (< 200 mg/dl)	3
Medium neutrophil levels (≥4007 and < 5955 per μl)	3
High neutrophil levels (≥5955 per μl)	5

A1AT: alpha-1 antitripsin

*A total point score for a given patient is obtained by summing all the points for each applicable characteristic. The points assigned to each predictor variable were based on coefficients obtained from the logistic-regression model adjusted for age, sex, alpha 1-antitripsin, cholesterol and neutrophils exposed in Table 3