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• W2047221799 abstract "Background Published epidemiologic research usually provides a quantitative assessment of random error for effect estimates, but no quantitative assessment of systematic error. Sensitivity analysis can provide such an assessment. Methods We describe a method to reconstruct epidemiologic data, accounting for biases, and to display the results of repeated reconstructions as an assessment of error. We illustrate with a study of the effect of less-than-definitive therapy on breast cancer mortality. Results We developed SAS code to reconstruct the data that would have been observed had a set of systematic errors been absent, and to convey the results. After 4,000 reconstructions of the example data, we obtained a median estimate of relative hazard equal to 1.5 with a 95% simulation interval of 0.8-2.8. The relative hazard obtained by conventional analysis equaled 2.0, with a 95% confidence interval of 1.2-3.4. Conclusions Our method of sensitivity analysis can be used to quantify the systematic error for an estimate of effect and to describe that error in figures, tables, or text. In the example, the sources of error biased the conventional relative hazard away from the null, and that error was not accurately communicated by the conventional confidence interval." @default.
• W2047221799 created "2016-06-24" @default.
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• W2047221799 creator A5042537283 @default.
• W2047221799 date "2003-07-01" @default.
• W2047221799 modified "2023-10-11" @default.
• W2047221799 title "Semi-Automated Sensitivity Analysis to Assess Systematic Errors in Observational Data" @default.
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• W2047221799 doi "https://doi.org/10.1097/01.ede.0000071419.41011.cf" @default.
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