The mean number of inappropriate drugs ( STOPP criteria ) was higher at the end of the study in the control than in the intervention group ( 1.29 1.56 vs 0.81 1.13 ) , as was the number of residents on 6 or more drugs ( 76.5 % vs. 67.0 % ) , using antipsychotics ( 9.1 % vs 3.2 % ) or duplicate medications ( 32.5 % vs 9.2 % ) .