Fig. 1From: C-reactive protein levels, airflow obstruction, and chronic kidney diseaseAge-specific prevalence of airflow obstruction and chronic kidney disease. a Age-specific prevalence of airflow obstruction, b age-specific prevalence of chronic kidney disease (CKD). A linear-by-linear association test showed a significant increase in prevalence of airflow obstruction and CKD with increasing age (p < 0.001)Back to article page