Ezzet F, Whitehead J
Medical Department, Ciba-Geigy AG, Basel, Switzerland.
Stat Med. 1991 Jun;10(6):901-6; discussion 906-7. doi: 10.1002/sim.4780100611.
Crossover studies have been successfully conducted in the case of continuous responses. Existing procedures of analysis for ordinal responses, on the other hand, are rarely satisfactory unless strict, usually unrealistic, assumptions are made. In this paper we investigate a random effects model and show that the model is simple and general. Interpretation of parameters is easy, though with a complicated fitting procedure.
