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b
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c
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Risk difference |
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Risk ratio |
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Odds ratio* |
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Odds ratio†
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- Determine the values of b and c first. Second, for all effect measures, and a = n -(d + b + c).
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s
0 or s is estimate of standard error calculated from the p-value.
- *Estimate and both proportions known.
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†Estimate , one proportion , and p-value known.