Before revision: Inference Risk difference can be estimated from a 2x2 contingency table: GroupExperimental (E) Control (C) Events (E) EE CE Non-events (N) EN CN The point estimate of the risk difference is The sampling distribution of RD is approximately normal, with standard error The confidence interval for the RD is then where is the standard score for the chosen level of significance We could assume a disease noted by , and no disease noted by , exposure noted by , and no exposure noted by .
After revision: Bayesian interpretationInference Risk difference can be estimated from a 2x2 contingency table: GroupExperimental (E) Control (C) Events (E) EE CE Non-events (N) EN CN The point estimate of the risk difference is The sampling distribution of RD is approximately normal, with standard error The confidence interval for the RD is then where is the standard score for the chosen level of significance We could assume a disease noted by , and no disease noted by , exposure noted by , and no exposure noted by .