In a setting where researchers want to show that they are not “fishing” (Humphreys, Sierra, and Windt 2013), using pre-treatment covariates in the design stage can be helpful (Higgins, Sävje, and Sekhon 2016).
An engem Kader wou Fuerscher ze weisen wëllt, datt se net "Fëscherei" sinn (Humphreys, Sierra, and Windt 2013) , andeems Pre-Behandlung covariates am Design Etapp duerstelle kann (Higgins, Sävje, and Sekhon 2016) .