Ju-Hao Hsieh, Julie Chi Chow
Development of mobile CAT for patient feedback on pediatric consultations based on Rasch analysis of online techniques
Medicine
community interventions effective realworld conditions participants need sufficient exposure intervention unclear dose intensity intervention differ among study participants lowincome areas aimed understand patterns exposure different components multilevel multicomponent obesity prevention program inform future impact analyses bmore healthy communities kids bhck communityrandomized controlled trial implemented 28 lowincome zones baltimore two rounds waves exposure three different intervention components corner storecarryout restaurants social mediatext messaging youthled nutrition education assessed via postintervention interviews 385 lowincome urban youths caregivers exposure scores generated based selfreported viewing bhck materials posters handouts educational displays social media posts participating activities including taste tests intervention intervention component points assigned exposure study materials activities scaled 01 range yielding overall bhck exposure score youths mean 11 range 076 points caregivers 11 067 possible highest score 13 ordered logit regression analyses used investigate correlates youths caregivers exposure level quartile exposure mean intervention exposure scores significantly higher intervention comparison youths mean 16 vs 05 p 0001 caregivers mean 16 vs 06 p 0001 however exposure scores low groups 10 comparison group moderately exposed intervention 1year increase age 33 lower odds highly exposed intervention odds ratio 077 95 confidence interval 069 088 unadjusted adjusted model controlling youths sex household income treatment effects may attenuated communitybased trials participants may differentially exposed intervention components comparison group may also exposed exposure measured provide context impact evaluations multilevel trials future analyses linking exposure scores outcome control potential confounders treatmentonthetreated approach recognizing confounding selection bias may exist affecting causal inference clinicaltrialsgov nct02181010 retrospectively registered 2 july 2014