In addition , the intervention group had a lower incidence of consuming caffeine-containing energy drinks ( adjusted odds ratio : 0.46 [ 95 % CI : 0.22 to 0.99 ] ) and had better behavioral ( mean difference : -0.56 [ 95 % CI : -1.02 to -0.10 ] ; Cohen 's d = 0.13 ) and mental health ( mean difference : -0.30 [ 95 % CI : -0.15 to -0.46 ] ; Cohen 's d = 0.11 ) outcomes .