TY - JOUR
T1 - Comparison of case ascertainment by medical record linkage and cohort follow-up to determine incidence rates for transient ischemic attacks and stroke
AU - Whisnant, Jack P.
AU - Joseph Melton, L.
AU - Davis, Patricia H.
AU - Michael O'Fallon, W.
AU - Nishimaru, Katsuya
AU - Schoenberg, Bruce S.
N1 - Funding Information:
Acknowledgement-This study was supported in part by Research Grants NS-06663 and AR-30582 from the National Institutes of Health.
PY - 1990
Y1 - 1990
N2 - During the period 1960-1972, the medical record linkage index method provided an estimated average annual age- and sex-adjusted rate for first transient ischemic attack (TIA) of 134 per 100,000 population for those age 50 years and older. The cohort method estimate was 237 per 100,000 population (95% confidence limits (CL), 165-310). The discrepancy was due to 18 cases of TIA noted at the time of patient visits in the cohort analysis that were not identified from the medical record analysis. The cohort analysis for all strokes at age 50 years and older was not significantly different from the medical record linkage analysis. Although the cohort follow-up method provided better case ascertainment in this study, current indexing procedures provide case ascertainment equal to that of the cohort method and at less cost. No trend was found to suggest that incidence rates for TIA were decreasing in the period 1955-1979, in contrast to stroke in Rochester, Minn.
AB - During the period 1960-1972, the medical record linkage index method provided an estimated average annual age- and sex-adjusted rate for first transient ischemic attack (TIA) of 134 per 100,000 population for those age 50 years and older. The cohort method estimate was 237 per 100,000 population (95% confidence limits (CL), 165-310). The discrepancy was due to 18 cases of TIA noted at the time of patient visits in the cohort analysis that were not identified from the medical record analysis. The cohort analysis for all strokes at age 50 years and older was not significantly different from the medical record linkage analysis. Although the cohort follow-up method provided better case ascertainment in this study, current indexing procedures provide case ascertainment equal to that of the cohort method and at less cost. No trend was found to suggest that incidence rates for TIA were decreasing in the period 1955-1979, in contrast to stroke in Rochester, Minn.
KW - Cohort analysis
KW - Incidence rate
KW - Medical record linkage analysis
KW - Stroke
KW - Transient ischemic attack (TIA)
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U2 - 10.1016/0895-4356(90)90239-L
DO - 10.1016/0895-4356(90)90239-L
M3 - Article
C2 - 2384767
AN - SCOPUS:0025172871
SN - 0895-4356
VL - 43
SP - 791
EP - 797
JO - Journal of Clinical Epidemiology
JF - Journal of Clinical Epidemiology
IS - 8
ER -