Over 90 million Americans have basic or below basic literacy skills, which are independently associated with poor understanding of health information, poor health behaviors and poor clinical outcomes. Prior work from our study team has demonstrated that lower health literacy or numeracy is associated with lower rates of breastfeeding, problems mixing infant formula, difficulty understanding food labels and portion sizes, difficulty understanding growth charts, higher Body Mass Index (BMI) in adults and children, and difficulties with medication dosing and other safety issues. However, to date, there has been limited study of the evolving role of parent literacy in the long-term health of young children, and most studies have only been cross-sectional. In 2009, we were awarded a 5-year NIH R01 to perform a cluster randomized trial to evaluate the impact of a health literacy/health communication intervention on early childhood obesity prevention (known as the "Greenlight Intervention Study") in four academic primary care clinics. Two clinics received a health literacy sensitive intervention for obesity prevention, while two active control sites received education in injury prevention. English- and Spanish-speaking parents and their infants were enrolled at the child's routine 2 month-old preventive care visit and are followed until the child is 2 years old. Throughout the study, multiple measures of child health status are collected, including clinical indicators (e.g., child weight and length, immunization status, health-care utilization), behaviora indicators (e.g., dietary and physical activity, injury prevention behaviors), and health communication-related assessments (e.g., parent health literacy/numeracy, perceived provider communication). Recruitment of 865 families was completed September 1, 2012. Retention rates have been promising to date, with >90 percent of eligible families completing their 2 year visits. Cross-sectional analyses of data from the baseline 2 month well-child visit demonstrated significant associations between low literacy and increased "obesogenic" behaviors and worse injury prevention behaviors. Preliminary results at 4 and 6 months suggest that the intervention improved dietary and physical activity-related infant care behaviors. Through this competing renewal, we propose to continue to follow this unique child cohort, which we call the "Greenlight Cohort Study," with data collection through phone surveys and in-person interviews every six months until children are 5 years old. This will allow us to assess the long-term effects of the original intervention. In addition, this longitudinal cohort will provide us the opportunity to examine the relationship between parent literacy and early childhood health-related outcomes, including family health behaviors, child obesity, injury, and child development. This study will also contribute new information on the validity of parent literacy measures over time in the context of child health. The proposed study will provide the most robust understanding to date of the role and importance of parent health literacy in early childhood obesity prevention and other child health-related issues and shape future interventions to curb obesity and improve child health.

Public Health Relevance

Our original award (the Greenlight Intervention Study) enrolled 865 families with infant children and evaluated the impact of a health literacy/health communication intervention on early childhood obesity prevention at four academic pediatric primary care clinics. For this competing renewal, we propose to follow this unique cohort until the children are 5 years old (through the Greenlight Cohort Study), in order to assess the long term impact of the Greenlight Intervention Study and to more robustly examine the influence of parent literacy on child health-related outcomes over time.

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
Research Project (R01)
Project #
2R01HD059794-06
Application #
8577843
Study Section
Special Emphasis Panel (ZRG1-RPHB-P (50))
Program Officer
Haverkos, Lynne
Project Start
2009-01-05
Project End
2018-11-30
Budget Start
2013-12-01
Budget End
2014-11-30
Support Year
6
Fiscal Year
2014
Total Cost
$713,026
Indirect Cost
$125,316
Name
Vanderbilt University Medical Center
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
004413456
City
Nashville
State
TN
Country
United States
Zip Code
37212
Yin, H Shonna; Sanders, Lee M; Rothman, Russell L et al. (2014) Parent health literacy and "obesogenic" feeding and physical activity-related infant care behaviors. J Pediatr 164:577-83.e1
Heerman, William J; Perrin, Eliana M; Yin, H Shonna et al. (2014) Health literacy and injury prevention behaviors among caregivers of infants. Am J Prev Med 46:449-56
Yin, H Shonna; Sanders, Lee M; Rothman, Russell L et al. (2012) Assessment of health literacy and numeracy among Spanish-Speaking parents of young children: validation of the Spanish Parental Health Literacy Activities Test (PHLAT Spanish). Acad Pediatr 12:68-74
Ciampa, Philip J; Kumar, Disha; Barkin, Shari L et al. (2010) Interventions aimed at decreasing obesity in children younger than 2 years: a systematic review. Arch Pediatr Adolesc Med 164:1098-104
Kumar, Disha; Sanders, Lee; Perrin, Eliana M et al. (2010) Parental understanding of infant health information: health literacy, numeracy, and the Parental Health Literacy Activities Test (PHLAT). Acad Pediatr 10:309-16