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Editor's Correspondence |

Risk of Heart Failure With Human Immunodeficiency Virus Is Greater Than Hypertension?—Reply

Adeel A. Butt, MD, MS; Amy C. Justice, MD, PhD; Matthew S. Freiberg, MD, MSc
Arch Intern Med. 2011;171(19):1773-1774. doi:10.1001/archinternmed.2011.560.
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We thank de Melo Neto et al for their insightful comments about our article.1 We agree that using ICD-9 codes can potentially introduce a bias in any analysis using such data. We have previously validated hypertension ICD-9 codes against structured medical chart review as the gold standard.2 Among HIV-infected persons enrolled in the 3-site Veterans Aging Cohort Study, the prevalence of hypertension by ICD-9 codes and medical chart reviews was 28% and 32% respectively, with an agreement of 85.2% and a κ value of 0.65. Hence, there may have been a slight underreporting of hypertension in the HIV-infected group. We are currently evaluating whether diagnosis of hypertension differs by HIV status using actual blood pressure measurement. For diabetes, we used a combination of laboratory measurements, use of insulin and oral hypoglycemic medications, and ICD-9 codes, as used in several previous studies.3,4

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October 24, 2011
Alexandre José de Melo Neto; Francisca Mosele; Sandra C. Fuchs, MD, PhD
Arch Intern Med. 2011;171(19):1773-1774. doi:10.1001/archinternmed.2011.490.
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