The SAS System 11:56 Sunday, July 13, 2008 1 The Mixed Procedure Estimates Standard Label Estimate Error DF t Value Pr > |t| drug a-c at hour 1 -0.1962 0.1945 69 -1.01 0.3166 hour 1-2 drug a 0.07667 0.04698 69 1.63 0.1073