Results revealed significant effects on most of the outcome parameters for MI + PI ( eg , mean SD BMI z score : 2.58 0.61 ) compared with the passive control group ( 2.76 0.70 ; post hoc test , P = .02 ) , as well as an additional superiority of MI + PI compared with MI only ( 2.81 0.76 ; post hoc test , P = .05 ) .