Health literacy and health behaviors in parent-adolescent dyads: an actor-partner interdependence model approach

FirstStep2Health: A cluster randomised trial to promote healthy behaviours and prevent obesity amongst low-income preschoolers

OBJECTIVE

To evaluate the preliminary effects of a theory-based, multi-component intervention on improving healthy lifestyle behaviours and preventing obesity amongst low-income preschoolers.

METHODS

A cluster randomised controlled trial was conducted at 10 daycare centres. The 16-week FirstStep2Health intervention, grounded in the Actor-Partner Interdependence Model and the Social Cognitive Theory, included five components: a Facebook-based parent programme, three virtual parent meetings, three weekly motivational text messages, parent-child learning via weekly child letters and daycare centre-based child programme.

RESULTS

A total of 95 preschoolers (53 intervention and 42 control) participated. Preschoolers' mean age was 49.27 months, with 57.9% being female, 12.6% being Hispanic and 40% being African American. The intervention significantly decreased intervention preschoolers' fat intake (B = -33.76, p = 0.047) and % body fat (B = -1.18, p = 0.036) compared to the control. During year 2, there were significant intervention effects on increasing skin carotenoids (B = 87.06, p = 0.035). Although not statistically significant, the intervention showed positive effects on increasing preschoolers' fruit/vegetable intake; and decreasing screen time, body mass index z-score and proportion of overweight/obesity.

CONCLUSIONS

Even with some potential limitations (small sample size, measurement concerns and confounding with Coronavirus Disease 2019 pandemic), the study's results support the preliminary efficacy of the FirstStep2Health intervention in preventing obesity amongst low-income racially diverse preschoolers.

Sources and perceived credibility of child nutrition information in relation to maternal health literacy

OBJECTIVE

To examine sources and perceived credibility of child nutrition information by maternal health literacy.

METHODS

US mothers of children (0-12 years) who used social media regularly (N = 340) completed an online survey. Health literacy was assessed using the Newest Vital Sign. Child nutrition information sources and perceived credibility of sources were compared by health literacy using logistic and quantile regression models.

RESULTS

Seventeen percent of mothers had limited health literacy. Compared to mothers with adequate health literacy, those with limited health literacy were more likely to get child nutrition information from siblings, extended family, dietitians, doctors, nurse practitioners, or physician assistants, and government agencies, and less likely to get information from Facebook. Mothers with limited health literacy rated information from parents, friends, Facebook, and Instagram as more credible than mothers with adequate health literacy. While perceived credibility of information from doctors, nurse practitioners, or physician assistants was high overall, mothers with limited health literacy perceived information from these health care providers as less credible.

CONCLUSIONS

Sources of child nutrition information and perceived credibility differ by maternal health literacy.

PRACTICE IMPLICATIONS

Pediatric providers are encouraged to refer parents to engaging resources that provide evidence-based child nutrition information.

Health literacy and adolescents' substance use behaviors and correlates: a scoping review

From 2011 to 2023, substance use increased by 23% worldwide. Given that substance use initiation is highest during adolescence, it is crucial to identify amenable correlates of substance use prevention [e.g. health literacy (HL)], which, if embedded in interventions, may improve uptake and outcomes. Hence, this study conducted a scoping review to answer the question: What is known from the existing literature about the relationship between HL and substance use correlates and behaviors in adolescents? Five electronic databases and the bibliography of review articles were searched and a total of 1770 records were identified. After removing duplicates and engaging in three levels of screening to identify studies that included adolescents ≤ 25 years old and assessed the relationship between general HL (vs. behavior/disease-specific health knowledge) and substance use behaviors and correlates, 16 studies were retained. Studies assessed alcohol-related (n = 11), tobacco-related (n = 12), electronic vapor product use-related (n = 4), cannabis-related (n = 1), and amphetamines/methamphetamines-related (n = 1) outcomes. Studies spanned Africa, Asia, Europe, and North and Central America. Most studies included substance use as an outcome and found an inverse relationship between HL and use. Few studies examined substance use correlates (e.g. risk perception). There were no longitudinal or intervention studies. This review highlighted that the topic of adolescent HL and its relationship with substance use remains inadequately researched. Notable gaps for future studies include intervention and longitudinal designs, expansion of outcomes (e.g. more studies on marijuana, prescription drug misuse, vaping, substance use-related correlates), and examining HL as a mediator or moderator of substance use and its correlates.

Validation of the Assessments of Adult Health Literacy: A Rasch Measurement Model Approach

Background

Both the World Health Organization and U.S. Department for Health and Human Services have emphasized the importance of health literacy (HL) to improving population health and reducing health disparities. HL includes three core areas/qualities: functional (i.e., health-related reading, writing, and numeracy), interactive/communicative (i.e., skills for interacting with multiple constituents and sources of information and navigating the health environment), and critical (i.e., personal and community advocacy for health). HL is implicated in medical adherence, preventive health, mental health stigma and help-seeking, and health decision-making. Though HL is critical to health and health decision-making, research on HL is still relatively limited, with most research focusing on functional HL. A major gap in research is related to the lack of measurement of interactive and critical HL. To address this gap, this study modified and assessed the validity of the Assessments of Adolescent Health Literacy (AAHL-Adolescent), test-based assessments of adolescents' functional, interactive, and critical HL, in an adult sample.

Methods

One item from the AAHL-Adolescent item bank was modified to be more appropriate for an adult sample. Adults (n=2346) completed a measurement battery that included the HL item bank (12 functional, 15 interactive, and 9 critical HL questions), Newest Vital Sign (NVS), Single-Item Literacy Scale (SILS), demographics, and questions about HL-related behaviors. The assessments were evaluated and validated using Rasch measurement models. Convergent and criterion validity were assessed.

Results

The final 7-item functional, 10-item interactive, and 7-item critical HL assessments and their composite (24 items) fit their respective Rasch models. Item-level invariance was established for gender, ethnicity, education, and age across all assessments. Differential item functioning for race was noted for two items on the interactive HL assessments. Good convergent validity with the NVS and SILS and good criterion validity with the HL-related behaviors were observed for all assessments.

Conclusions

The AAHL-Adult is the first test-based instrument validated in the U.S. that includes assessments for all three core qualities of HL. These assessments have utility across multiple settings, including public health program planning and evaluation, intervention development and evaluation, and clinical settings.