Recommended confidence intervals for two independent binomial proportions

@article{Fagerland2015RecommendedCI,
  title={Recommended confidence intervals for two independent binomial proportions},
  author={Morten Wang Fagerland and Stian Lydersen and Petter Laake},
  journal={Statistical Methods in Medical Research},
  year={2015},
  volume={24},
  pages={224 - 254}
}
The relationship between two independent binomial proportions is commonly estimated and presented using the difference between proportions, the number needed to treat, the ratio of proportions or the odds ratio. Several different confidence intervals are available, but they can produce markedly different results. Some of the traditional approaches, such as the Wald interval for the difference between proportions and the Katz log interval for the ratio of proportions, do not perform well unless… 
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