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Slide Presentation of the 2007 Annual Meeting of AHRQ


Summary Points

Text Description is below the image.
  • Longitudinal data allow for strong quasi-experimental designs
    • Provide more valid results
    • Visible effects almost always significant
  • Creative use of comparison series
    • Unexposed comparison population
    • High risk subgroups
    • Unintended outcomes

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AHRQ Advancing Excellence in Health Care