'A confidence interval for the pooled odds ratio.
Parameters
alpha : float
`1 - alpha` is the nominal coverage probability of the
interval.
method : string
The method for producing the confidence interval.  Currently
must be \'normal\' which uses the normal approximation.
Returns
lcb : float
The lower confidence limit.
ucb : float
The upper confidence limit.'

def oddsratio_pooled_confint(self, alpha=0.05, method='normal'):

    (lcb, ucb) = self.logodds_pooled_confint(alpha, method=method)
    lcb = np.exp(lcb)
    ucb = np.exp(ucb)
    return (lcb, ucb)
