Hello everyone. I conducted an odds ratio test with a certain software, and I'm not sure about which confidence interval (CI) to use. The 2x2 table consists the distribution of counts as follows, by each cell: a=26, b=21, c=12, d=2. The output of the results included the calculated OR, with the following four types of CIs: Mid-p exact, Fisher's exact, Cornfield, Wald. The question is: based on the distribution of the observations, particularly considering that cell d includes 2 observations (<5), which of the four abovementioned CIs is the most appropriate to use?