Figure 1.

Survival plots for all-cause mortality in subjects aged 40 y or older with obstructive lung disease by race/ethnicity group. A, An unadjusted Cox proportional hazard model shows an advantage in mortality for Mexican Americans (black line) compared with non-Hispanic whites. B, This advantage is no longer apparent in the adjusted model. Adjustment for age, sex, BMI, lifetime smoking status, pack-y of smoking, education level, asthma history, age at asthma diagnosis, dyspnea, and FEV₁ % predicted was performed. HR = hazard ratio.