PubMed · 9229219
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O Gefeller. 1997. Relative attributable risks.. https://pubmed.ncbi.nlm.nih.gov/9229219/
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OBJECTIVE: To develop a prototype program for surveillance of causes of death of dogs, using resources developed for the World Wide Web, to enable collection of data from veterinarians in small animal practice and dissemination of results in a timely manner at minimal expense. DESIGN: Epidemiologic survey. SAMPLE POPULATION: Small animal veterinarians who were members of NOAH, Veterinary Information Network (VIN), or VetPlus-L. PROCEDURE: Internet electronic communications and Web pages were used for solicitation and collection of data, dissemination of results, and follow-up discussions with participants. Data were stored in a relational database. RESULTS: 25 veterinarians actively submitted case material. On the basis of analysis by region and school of veterinary medicine attended, these veterinarians were representative of all small animal practitioners in the United States. During the 6-month study, 621 case reports were submitted. Analysis of results included determination of number of dogs, with proportions calculated for primary reason for death, primary clinical sign, and breed, as well as creation of a map depicting distribution of the practitioners. Additional data were obtained for analysis to provide information of interest. CLINICAL IMPLICATIONS: A national database representative of dogs examined by small animal practitioners would be a valuable source of information. Rapidly and easily accessible return of information and results is important for any surveillance system. The program described here appears to be a successful method for collecting data from practitioners.
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For both dementia and Alzheimer's disease (AD), data regarding incidence rates in the oldest old and time trends in incidence are limited. The authors reanalyzed previously reported data on the incidence of dementia and AD in Rochester, Minnesota, from 1975 through 1984, using three new strategies. First, incidence rates were corrected by removing age-, sex-, and calendar year-specific prevalent cases from the census-derived denominator figures. Second, incidence figures for persons above age 84 years were disaggregated. Third, time trends were investigated graphically using age-specific curves and birth cohort curves. Dementia diagnosis and AD diagnosis followed defined ad hoc criteria. Analyses were conducted for men, women, and both sexes combined, and for dementia and AD separately. The age-specific incidence rates were similar in men and women, continued to increase after age 84 years, and remained stable over time for both dementia and AD. No birth cohort effect was present for either dementia or AD. The similar risks seen in men and women, the continuing increase in incidence after age 84 years, and the stability of incidence over time have important implications for etiologic research on AD.