Sensitivity and Specificity of Death Certificates for Diabetes
As good as it gets?
- W. Susan Cheng, MPH1,
- Deborah L. Wingard, PHD2,
- Donna Kritz-Silverstein, PHD2 and
- Elizabeth Barrett-Connor, MD2
- 1Joint Doctoral Program, University of California, San Diego, San Diego State University, San Diego, California
- 2University of California, San Diego, Family and Preventive Medicine
- Address correspondence and reprint requests to Deborah Wingard, PhD, University of California, San Diego, Family & Preventive Medicine, 9500 Gilman Dr., La Jolla, CA 92093-0607. E-mail: dwingard{at}ucsd.edu
Abstract
OBJECTIVE—Diabetes is the sixth leading cause of death in U.S adults, which may be an underestimate because of under-reporting on death certificates. In this study we examined death certificate sensitivity and specificity for diabetes, as well as the factors related to better reporting, in a community-based sample.
RESEARCH DESIGN AND METHODS—Death certificates were obtained for 3,209 decedents who were enrolled in the Rancho Bernardo cohort in 1972–1974 and followed through 2003. Diabetes status was reassessed at periodic clinic visits and annual mailed surveys during an average follow-up of 15.2 ± 7.6 years. Diabetes reported anywhere on death certificates was abstracted. Sensitivity and specificity calculations among diabetic participants were stratified by age, sex, year, place, cause of death, and diabetes medication use.
RESULTS—Among 1,641 men and 1,568 women, 378 decedents had a history of diabetes, 168 of whom had diabetes listed anywhere on their death certificates. The sensitivity and specificity were 34.7 and 98.1%. Diabetes reporting on death certificates did not improve over time or vary significantly by age and sex, but sensitivity for diabetes reporting was better for recent (1992–2003) cardiovascular disease (CVD) deaths compared with any other causes of death (48.9 vs. 28.6%, respectively, P < 0.05).
CONCLUSIONS—Although diabetes reporting on death certificates did not improve over time, sensitivity was better for diabetes in the context of CVD deaths, probably reflecting the increasing recognition that diabetes is a major cardiovascular risk factor.
Footnotes
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Published ahead of print at http://care.diabetesjournals.org on 24 October 2007. DOI: 10.2337/dc07-1327.
The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked “advertisement” in accordance with 18 U.S.C Section 1734 solely to indicate this fact.
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- Accepted October 18, 2007.
- Received July 10, 2007.
- DIABETES CARE
