On implementation of the Miettinen-Nurminen score method for estimating confidence intervals for risk/rate parameters by using the SAS/STAT® FREQ procedure and ad hoc R programs
https://www.researchgate.net/publication/334139697_On_implem...
This likelihood-based approach has become known in the theoretical biometric and applied medical literature as the Miettinen-Nurminen method. In this commentary, we bring up the computation of the relative risk parameters

Miettinen-Nurminen (Score) Confidence Limits
https://documentation.sas.com/doc/en/statcdc/14.2/statug/sta...
Miettinen-Nurminen (score) confidence limits for the risk difference (Miettinen and Nurminen 1985) are computed by inverting score tests for the risk difference.

http://support.sas.com/documentation/onlinedoc/stat/151/freq...