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Metaanalysen epidemiologischer Studien

Metaanalysis from epidemiological data

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Zusammenfassung

□ Hintergrund

In den letzten Jahren wurden häufig Metaanalysen durchgeführt, wenn anhand mehrerer epidemiologischer Studien eine einheitliche Bewertung von Risikofaktoren nicht möglich war. Die Ergebnisse werden dann insbesondere zur Beurteilung von schwachen Risikofaktoren herangezogen.

□ Material und Methode

In unserer Arbeit beschreiben wir methodische Aspekte bei der Durchführung solcher Analysen, und der Unterschied zwischen Metaanalysen aus publizierten Daten und Metaanalysen aus Originaldaten, auch gepoolte Analysen genannt, wird verdeutlicht. Die methodischen Aspekte werden anhand eines Beispiels zum Risiko der oralen Kontrazeption für Brustkrebs demonstriert. Grenzen von Metaanalysen aus publizierten Daten werden aufgezeigt.

□ Schlußfolgerung

Gepoolte Neuauswertungen sind zwar wesentlich zeitaufwendiger und kostenintensiver, sie können aber zu zuverlässigeren und glaubwürdigeren Ergebnissen führen.

Abstract

□ Background

A metaanalysis is often performed if risk assessment with available epidemiological data is not sensible. The results of these analyses serve mainly to quantify the risk of weak associations.

□ Material and Method

In this paper we describe methodologic issues of this approach with emphasis on the difference between metaanalysis from published data and from individual patient records. As an example we discuss studies on oral contraceptives and breast cancer. Limits of metaanalysis from published data are given.

□ Conclusion

Although metaanalysis with individual data may be cost- and time-consuming their results are more reliable.

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Blettner, M., Sauerbrei, W. Metaanalysen epidemiologischer Studien. Med Klin 93, 442–445 (1998). https://doi.org/10.1007/BF03042643

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  • DOI: https://doi.org/10.1007/BF03042643

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