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Part A The Foundations >
Chapter 5. Why Study Results Mislead: Bias and Random Error
Part F Summarizing the Evidence >
Chapter 20.2. Fixed-Effects and Random-Effects Models
Examples of Differences in Point Estimates and Confidence Intervals From Meta-analyses
Part B Therapy >
Chapter 10.3. What Determines the Width of the Confidence Interval?
Small Sample Sizes Can Give More Precise Results Than Large Sample Sizes
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The Rational Clinical Examination
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> Original Article: Is This Woman Perimenopausal? > Methods > Search Strategy and Quality Review >
We searched the MEDLINE database for English-language articles concerning the diagnosis of...
Users' Guides to the Medical Literature EDUCATION GUIDES
Appraising Evidence About Harms
Appraising Evidence About Therapy
The absolute difference in rates of good or harmful outcomes between experimental groups (experimental group risk, or EGR) and control groups...
The absolute difference in rates of good or harmful outcomes between experimental groups (experimental group risk, or EGR) and control groups (control group risk, or CGR), calculated as the risk in the control group minus the risk in the experimental group (CGR – EGR). For instance, if the rate of adverse events is 20% in the control group and 10% in the treatment group, the absolute difference is 20% – 10% = 10%.
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