RESULTS	The number of children experiencing at least 1 AOM episode was significantly smaller in the vaccinated group ( P < 0.001 ) , as was the mean number of AOM episodes ( P = 0.03 ) , the mean number of AOM episodes without perforation ( P < 0.001 ) , and the mean number of antibiotic courses ( P < 0.001 ) ; the mean duration of bilateral OME was significantly shorter ( P = 0.03 ) .\