Retention strategies for health disparities preventive trials: findings from the Early Childhood Caries Collaborating Centers

• Published in: Journal of public health dentistry Vol. 77; no. 1; pp. 63 - 77
• Main Authors: Garcia, Raul I., Tiwari, Tamanna, Ramos‐Gomez, Francisco, Heaton, Brenda, Orozco, Mario, Rasmussen, Margaret, Braun, Patricia, Henshaw, Michelle, Borrelli, Belinda, Albino, Judith, Diamond, Courtney, Gebel, Christina, Batliner, Terrence S., Barker, Judith C., Gregorich, Steven, Gansky, Stuart A.
• Format: Journal Article
• Language: English
• Published: United States Wiley Subscription Services, Inc 01.12.2017
• Subjects: attrition; Child; Child, Preschool; Community-Based Participatory Research; dental caries; Dental Caries - epidemiology; Dental Caries - ethnology; Dental Caries - prevention & control; Dental schools; Dentistry; Ethnic Groups; Female; Health disparities; Health Status Disparities; Humans; Infant; Male; minority groups; National Institute of Dental and Craniofacial Research (U.S.); participant retention; Patient Compliance - statistics & numerical data; Patient Selection; randomized controlled trials; Randomized Controlled Trials as Topic; refusal to participate; Retention; Studies; United States - epidemiology; dental caries; attrition; refusal to participate; health status disparities; participant retention; randomized controlled trials; child; minority groups
• ISSN: 0022-4006; 1752-7325
• DOI: 10.1111/jphd.12182

Objectives To identify successful strategies for retention of participants in multiyear, community‐based randomized controlled trials (RCTs) aiming to reduce early childhood caries in health disparities populations from diverse racial/ethnic backgrounds and across diverse geographic settings. Methods Four RCTs conducted by the Early Childhood Caries Collaborating Centers (EC4), an initiative of the National Institute of Dental and Craniofacial Research, systematically collected information on the success of various strategies implemented to promote participant retention in each RCT. The observational findings from this case series of four RCTs were tabulated and the strategies rated by study staff. Results Participant retention at 12 months of follow‐up ranged from 52.8 percent to 91.7 percent, and at 24 months ranged from 53.6 percent to 85.9, across the four RCTs. For the three RCTs that had a 36‐month follow‐up, retention ranged from 53.6 percent to 85.1 percent. Effectiveness of different participant retention strategies varied widely across the RCTs. Conclusions Findings from this case series study may help to guide the design of future RCTs to maximize retention of study participants and yield needed data on effective interventions to reduce oral health disparities.