Fig. 1From: Comorbidities and mortality risk in adults younger than 50 years of age with chronic obstructive pulmonary diseaseThe proportion of individuals carrying 0, 1, 2, 3, or ≥ 4 concurrent comorbidities within each group. The Right panel (pink) represent the estimates for females and the left panel (blue) for males. We adjusted the proportions estimates for age and cumulative smoking (see text for details)Back to article page