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      Low rates of testing and diagnostic codes usage in a commercial clinical laboratory: evidence for lack of physician awareness of chronic kidney disease.

      Journal of the American Society of Nephrology : JASN

      Adult, Aged, Blood Chemical Analysis, Cardiovascular Diseases, complications, diagnosis, Chemistry, Clinical, methods, Creatinine, blood, Cross-Sectional Studies, Databases as Topic, Female, Glomerular Filtration Rate, Health Personnel, Humans, International Classification of Diseases, Kidney Failure, Chronic, classification, Laboratories, Hospital, Male, Mass Screening, utilization, Middle Aged, Nephrology, Odds Ratio, Physicians, Prevalence, Risk Factors, Sensitivity and Specificity, Treatment Outcome

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          Abstract

          Improving outcomes for chronic kidney disease (CKD) requires early identification and recognition by physicians. There are few data on rates of testing or use of diagnostic codes for CKD. A cross-sectional analysis was performed of patients who were older than 40 yr and had one or more laboratory tests between April 1, 2002, and March 31, 2003, at a Laboratory Corporation of America regional laboratory. Objectives were to determine the frequency of testing for serum creatinine; prevalence of CKD, defined as estimated GFR <60 ml/min per 1.73 m2; and sensitivity of diagnostic codes for CKD for patients with and without risk factors for CKD and with or without cardiovascular disease (CVD). Of the 277,111 patients, 19% had serum creatinine measured, compared with 33 and 71% who had measurements of serum glucose and lipids, respectively. Patients with hypertension, diabetes, and age >60 yr were more likely to be tested for serum creatinine with odds ratio (OR; 95% confidence interval) of 2.09 (2.05 to 2.14), 1.22 (1.19 to 1.25), and 1.24 (1.22 to 1.27) respectively. Among patients tested, 30% had CKD. Sensitivity and specificity of kidney disease diagnostic codes compared with CKD defined by estimated GFR <60 ml/min per 1.73 m2 were 11 and 96%, respectively. In patients with hypertension, diabetes, age >60 years, and CVD, rates of testing and sensitivity of diagnostic codes were 53 and 14%, respectively. Low rates of testing for serum creatinine and insensitivity of diagnostic codes for CKD, even in high-risk patients, suggests inadequate physician awareness of CKD and limited utility of administrative databases for identification of patients with CKD.

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          Journal
          15930090
          10.1681/ASN.2005020192

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