Figure 3.

Prevalence of undiagnosed stage 3 CKD according to the presence of comorbidities at study index, by country and database. Established CVD includes patients with a history of myocardial infarction, unstable angina, stroke, transient ischaemic attack, coronary artery bypass graft and percutaneous coronary intervention. Study index is defined as the date of a patient’s second qualifying eGFR measurement. *Owing to a lack of granularity for ICD-9 diagnostic codes in the database used, type of diabetes could not be determined in patients from Italy. †Owing to a lack of granularity for ICD-9 codes in the database used, established CVD does not include coronary artery bypass graft and percutaneous coronary intervention in patients from Italy. CKD, chronic kidney disease; CVD, cardiovascular disease; eGFR, estimated glomerular filtration rate; ICD-9, International Classification of Diseases 9; LCED, Explorys Linked Claims and Electronic Medical Records Data.