Demographic characteristics of the included participants from the Longitudinal Aging Study in India (N = 31,103) overall and by region. Characteristics are weighted to account for differential sampling probabilities and selection into the spirometry sample. Means and standard deviations are shown for continuous variables (age); proportions and numbers are shown for binary and categorical variables (all other variables). Square brackets show the number of missing records for binary or continuous variables. BMI refers to body mass index.

Demographic characteristics of the included participants from the Longitudinal Aging Study in India (N = 31,103) overall and by region. Characteristics are weighted to account for differential sampling probabilities and selection into the spirometry sample. Means and standard deviations are shown for continuous variables (age); proportions and numbers are shown for binary and categorical variables (all other variables). Square brackets show the number of missing records for binary or continuous variables. BMI refers to body mass index.