Application of capture-recapture methodology to estimate the prevalence of dementia in South Carolina.

Sanderson M, Benjamin JT, Lane MJ, Cornman CB, Davis DR
Ann Epidemiol. 2003 13 (7): 518-24

PMID: 12932627

PURPOSE - The purpose of this study was to estimate the prevalence of dementia in individuals 65 years of age and older in the state of South Carolina using capture-recapture methodology.

METHODS - We linked data from the Department of Mental Health admissions, inpatient admissions, and emergency room visits. Separate log-linear models were used to obtain estimates of the underascertainment-corrected prevalence of dementia in twelve age-gender-race subgroups, which were summed to estimate the prevalence of dementia in the total population.

RESULTS - We found an overall prevalence of dementia of 14% in South Carolina for persons 65 years of age and older using capture-recapture methodology. This estimate of persons with dementia is 25% higher than the identified cases of dementia in the South Carolina Alzheimer's Disease Registry (10.5%).

CONCLUSIONS - Although capture-recapture methods are prone to limitations, they can be used to more accurately estimate the prevalence of dementia in a geographic area.

MeSH Terms (14)

Aged Aged, 80 and over Alzheimer Disease Dementia Epidemiologic Methods Female Humans Male Patient Discharge Prevalence Public Health Informatics Registries Reproducibility of Results South Carolina

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