In clinical studies, as well as in some other settings, the parameter of greatest interest is often the relative risk rather than the odds ratio The relative risk is best estimated using a population sample, but if the rare disease assumption holds, the odds ratio is a good approximation to the relative risk — the odds is p / (1 − p), so when p moves towards zero, 1 − pBased on this information, the odds ratio estimate 24 45 = = v u ˆOR = 1, indicating that low fruit/veggie "exposure" was associated with an % increase in risk The 95% confidence interval for the odd ratio parameter is calculated The ln(OR^) = and 24 1 45 1 1 1 = = u v SE ln ˆOR = Therefore, the 95% confidence Thus, if the confidence interval includes 1 (eg, 001, 2, 099, 101, or 099, 100 all include one in the confidence interval), then the expected true population odds ratio may be above or below 1, so it is uncertain whether the exposure increases or decreases the odds of the event happening with our specified level of confidence
Relative Risk Or Odds Ratio And 95 Confidence Intervals For Download Scientific Diagram
