Regression output from analyses of smoking status.

Number of participants, number of cases, person-years at risk (PYAR), hazard ratio (HR) and 95% confidence interval (CI) for risk of contracting any infection or pneumonia, being admitted to an intensive care unit and dying. Crude model adjusted for age (as time scale) and sex. Adjusted model adjusted for age (as time scale), sex, Charlson’s weighted comorbidity index, education, marital status, exercise, walking and alcohol consumption. (XLSX)