Testing Rank Similarity
depression
Since QTE analysis is most richly interpretable when rank similarity can be assumed, we tested whether our data and intended formulation were consistent with rank similarity. Following the method of Frandsen and Lefgren,Since there is not consensus in the literature about whether to define depression response as a percentage change from baseline as we have done vs an absolute change from baseline, we also tested for rank similarity using absolute change from baseline as the response variable. Under this alternative formulation, the interaction term between baseline depression severity and treatment arm in the model becomes significant (