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Aggregating Disparate Epidemiological Evidence: Comparing Two Seminal EMF Reviews

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  • Michael J. O'Carroll
  • Denis L. Henshaw

Abstract

Two seminal reviews (IARC, 2002; CDHS, 2002) of possible health effects from power‐frequency EMFs reached partly different conclusions from similar epidemiological evidence. These differences have an impact on precautionary policy. We examine the statistical aggregation of results from individual disparate studies. Without consistent exposure metrics, the advantage of meta‐analysis to estimate magnitude of effect is lost. However, counting positive and statistically significant results yields important information. This is not a substitute for meta‐analysis, but a fall‐back when meaningful meta‐analysis is not available. Representative results from 33 independent adult leukemia studies tabled by IARC yielded 23.5 positives (p≈ 0.01) and 9 significant‐positives (p

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  • Michael J. O'Carroll & Denis L. Henshaw, 2008. "Aggregating Disparate Epidemiological Evidence: Comparing Two Seminal EMF Reviews," Risk Analysis, John Wiley & Sons, vol. 28(1), pages 225-234, February.
    • Handle: RePEc:wly:riskan:v:28:y:2008:i:1:p:225-234
    DOI: 10.1111/j.1539-6924.2008.01009.x
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