Background Collecting complete and accurate family health history is critical to preventing type 2 diabetes. Purpose We seek to identify the optimal risk feedback approach that facilitates risk communication between parents and their adult children and helps them develop shared appraisals of family history of type 2 diabetes. Methods In a sample of parent-adult child dyads from 125 Mexican-heritage families residing in Houston, Texas, we examine change in parent-child dyadic (dis) agreement with respect to their shared family health history from baseline to 10 months after receipt of risk feedback generated by Family Healthware. A 2 × 2 factorial design is applied to test how the recipient (one parent or all family members) and the content (risk assessment with or without behavioral recommendations) of the feedback affect (dis)agreement through interpersonal ties, particularly dyadic risk communication. Results Providing risk assessment without behavioral recommendations to the parent, but not the adult child, shifts the dyads toward agreement (relative risk ratio [RRR]= 1.78, 95% confidence interval [CI] [1.18-2.67]), by activating reciprocal risk communication between parents and children (RRR =2.70, 95% CI [1.81-4.03]). Dyads with close interpersonal ties are more likely to shift toward agreement (RRR = 3.09, 95% CI [1.89-5.07]). Conclusion Programs aimed at improving family health history knowledge and accuracy of reports should tailor risk feedback strategically for better intervention effect and leverage a network approach in disease prevention among at-risk minority and/or immigrant populations. © Society of Behavioral Medicine 2018. All rights reserved.

Risk communication Family health history type 2 diabetes Mexican-Heritage families

adult child non insulin dependent diabetes mellitus risk Diabetes Mellitus, Type 2 Disease Susceptibility human Feedback, Psychological middle aged psychological feedback Adult Children Young Adult Humans male female Parent-Child Relations adult disease predisposition Medical History Taking anamnesis Mexican Americans child parent relation Mexican American