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. 2026 Jan 12;21:554995. doi: 10.2147/COPD.S554995

Table 2.

Assignment of Categorical Variables for Logistic Regression Analysis

Variable Coding
Smoking Cessation Status 0 = Success, 1 = Failure
GOLD Grade 0 = Mild/Moderate, 1 = Severe/Very severe
Marital status 0 = Other, 1 = Married
Post-COVID Sequelae 0 = No, 1 = Yes
Regular Physical Exercise 0 = No, 1 = Yes
Daily Cigarette Consumption 0 = ≤20 cigarettes, 1 = >20 cigarettes