Deterministic Record Linkage with Indirect Identifiers: Data of the Berlin Myocardial Infarction Registry and the AOK Nordost for Patients with Myocardial Infarction

作者：Maier B^*; Wagner K; Behrens S; Bruch L; Busse R; Schmidt D; Schuehlen H; Thieme R; Theres H

来源：Gesundheitswesen, 2015, 77(2): E15-E19.

DOI：10.1055/s-0034-1395642

• deterministic record linkage
• indirect identifiers
• myocardial infarction
• clinical registry
• health care quality assurance

Aim of the Study: How can 2 pseudonymised data sets be linked? Using the example of data from the Berlin Myocardial Infarction Registry and from a German sickness fund (AOK Nordost) we will demonstrate how record linkage can be achieved without personal identifiers.
Methods: In different steps the method of deterministic record linkage with indirect identifiers: age, sex, hospital admission date and time, will be explained.
Results: We were able to show that 80.6 % of the expected maximum number of patients were matched with our approach. As a result we had no duplicate matches in the linkage process, where one AOK patient was linked to 2 or more BMIR patients or vice versa. The matching variables produced enough uniqueness to be used as indirect patient identifiers.
Conclusion: Deterministic record linkage with the following indirect indicators: age, sex, hospital admission date and time was possible in our study of patients with myocardial infarction in a circumscribed geographical region, which limited the number of cases and avoided mismatches.

• 出版日期2015-2