Figure 1From: Methods for identifying 30 chronic conditions: application to administrative dataDevelopment of the cohort. ICD International Classification for Diseases, CKD chronic kidney disease. Barnett K, Mercer SW, Norbury M, Watt G, Wyke S, Guthrie B. Epidemiology of multimorbidity and implications for health care, research, and medical education: a cross-sectional study. Lancet. 2012;380(9836):37-43.Back to article page