statsmodels.stats.contingency_tables.Table2x2.log_riskratio_confint¶ Table2x2.log_riskratio_confint(alpha=0.05, method='normal')[source]¶ A confidence interval for the log risk ratio. Parameters: alphafloat1 - alpha is the nominal coverage probability of the confidence interval. methodstrThe method for producing the confidence interval. Currently must be ‘normal’ which uses the normal approximation.