There was no significant difference in adherence to AEDs based on detectable drug levels ( odds ratio [ OR ] 1.46 , 95 % confidence interval [ 95 % CI ] 0.74-2 .90 , p = 0.28 ) or by self-reports ( OR 1.00 , 95 % CI 0.71-1 .40 , p = 1.00 ) between the intervention and nonintervention group .