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Validity of register data on acute myocardial infarction and acute stroke

The Skaraborg Hypertension Project

Ulf Lindblad, From the Department of Community Health Sciences, University of Lund, Malmö

Lennart Råstam

Lennart Råstam, From the Department of Community Health Sciences, University of Lund, Malmö, Address for offprints: Lennart Råstam Dept of Community Health Sciences University of Lund S-214 01 Malmö Sweden

Jonas Ranstam

Jonas Ranstam, From the Department of Community Health Sciences, University of Lund, Malmö

Magnus Peterson

Magnus Peterson, Department of Medicine, Lidköping Hospital, Lidköping, Sweden

In the evaluation of a hypertension treatment program, the end-point surveillance included incidence of acute myocardial infarction and acute stroke identified from hospital in-patient registers and the national mortality register. To ascertain the validity, in-patient records containing the ICD-codes 410–411 and 430–438 were validated. First event of acute myocardial infarction and acute stroke suggested in the in-patient register could be confirmed in 96% and 94%, respectively. In-patient diagnoses of suspected acute myocardial infarction or other acute or subacute ischemic heart diseases, transient ischemic attack and unspecified cerebrovascular disease revealed high proportions of what in fact turned out to be definite events (11%, 24% and 53% respectively). It is concluded that disease ascertainment for this cohort study claims validation of register data with hospital records.

Key Words: Hypertension • primary care • end-point surveillance • in-patient register • validation • acute myocardial infarction • stroke

Scandinavian Journal of Public Health, Vol. 21, No. 1, 3-9 (1993)
DOI: 10.1177/140349489302100102


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