Inappropriate use of antimalarial drugs after a negative test was reduced from 84 % ( 201/239 ) in the control group to 52 % ( 413/796 ) in the basic-training group ( unadjusted RR 063 , 028-143 ; p = 025 ) and to 31 % ( 232/759 ) in the enhanced-training group ( 029 , 011-077 ; p = 002 ) .