Me and my colleagues have conducted a self-matched case series study to assess the adverse event following immunization. We have used “Conditional Poisson Regression” to assess the risk of the vaccine. After obtaining the Incidence Risk Ratio and its confidence intervals, we are willing to calculate the Power of our results. For ex: The calculated IRR is 1.9(95% CI = 1.1 – 2.9) obtained after conducting the regression on 397 cases. Does anyone know how can we calculate the power with these estimates?
Thank You in advance.
I am expecting some reference or help by anyone on this calculation.