Demographic and Clinical Characteristics of the DHS2 Stratified by Leukocyte Telomere Length Tertile.

Quantitative variables are shown as mean ± SD or median (1st – 3rd quartile). P-values are based on the Jonckheere-Terpstra test for trend or linear regression for continuous variables, and chi-square tests for trend or logistic regression for qualitative variables. †Includes current smokers only. Pack-years are calculated as (packs smoked per day) × (number of years as a smoker).*Gender is adjusted for age only. Analyses of ethnicities are adjusted for age and gender. All other analyses are adjusted for age, gender and ethnicity.