The likelihood of overall drug experimentation was doubled per SD increase in externalizing problems ( aOR = 2.28 , 95 % CI 1.33-3 .91 , p = .003 ) and , among girls , 2.82 times greater ( aOR = 2.82 , 95 % CI 1.34-5 .94 , p = .006 ) per SD increase in internalizing problems .