Would someone assist me in this question Please!!!!!

Question

Under which circumstances can an Odd Ratio estimate a Risk Ratio?

Answer 1

Based on my epidemiology education, odds ratios can only be valid estimates of the relative risk when the prevalence of the disease is low. This is because the odds ratio has a "Built-in" bias factor that, when the prevalence  is low, is virtually zero; as a result, it doesn't change the original relative risk formula.