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Figure 4 | BMC Medical Research Methodology

Figure 4

From: Evaluation of exposure-specific risks from two independent samples: A simulation study

Figure 4

Expected length given coverage for 95% confidence intervals of the ESR S , ESR R using a log-based variance, and ESR R using a binomial variance in Scenario 4. Empirical 95% confidence intervals are also shown. The analysis assumed an exposure probability of .20 and risk of disease in the unexposed of .09. The x-axis is the magnitude of the RR. Results are from simulations where both N1 and N2 are 5,000. Note: The expected length given coverage for the 95% CI around ESRS could not be computed when the RR was 5.0 because the coverage probability was 0.

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