Emergency Department Visits as Opportunities for Lifestyle Changes: A Groundbreaking Clinical Trial

Can the ED Serve as a Teachable Moment?

The Emergency Department as a 'Teachable Moment': Protocol for a Randomized Controlled Trial on Healthy Lifestyle Promotion

A novel randomized controlled trial (RCT) aims to determine if emergency department (ED) visits can serve as effective "teachable moments" to help patients adopt healthier lifestyles and reduce their risk of noncommunicable diseases (NCDs). The multicentre study, currently underway in Hong Kong, leverages self-determination theory and digital communication to promote multiple behavioral changes among ED attendees with health-risk behaviors. This innovative approach could provide valuable evidence for integrating preventive health strategies into emergency care settings, potentially addressing a significant gap in NCD prevention efforts.

Why Focus on Noncommunicable Diseases?

Noncommunicable diseases represent the leading cause of global mortality, accounting for 74% of all deaths worldwide. Cardiovascular diseases, cancers, respiratory diseases, and diabetes are responsible for over 80% of premature NCD deaths, with modifiable risk factors like tobacco use, harmful alcohol consumption, physical inactivity, and unhealthy diets significantly contributing to this burden. In Hong Kong specifically, a 2021 population survey revealed that 80.3% of Chinese adults had at least one health-risk behavior, while 47% exhibited two or more such behaviors. Despite the growing prevalence of NCDs, interventional studies have typically focused on single risk behaviors rather than addressing multiple lifestyle factors simultaneously, and most research has been conducted in Western populations with limited evidence from Chinese ethnic groups. The emergency department setting presents a unique opportunity for intervention, as patients experiencing physical discomfort may be more receptive to health behavior change recommendations.

How Is the RCT Designed for Impact?

The single-blinded, multicentre RCT is recruiting 1,172 participants across five major acute care hospitals in Hong Kong. Eligible participants include Chinese adults aged 18 or older who are triaged as semi-urgent or non-urgent, have at least one health-risk behavior (tobacco use, harmful alcohol consumption, unhealthy diet, or physical inactivity), own a smartphone, and can use instant messaging applications. The study employs stratified block randomization with varying block sizes of 4-10 to achieve balanced allocation between intervention and control groups. To account for an expected 30% attrition rate, the sample size was calculated to achieve 80% power at a 5% significance level, based on conservative effect estimates from previous pilot studies.

The intervention group receives a comprehensive, theory-driven approach consisting of several components. First, participants receive a brief telephone intervention using the AWARD model (Ask, Warn, Advise, Refer, and Do-it-again), which was originally developed for primary-care tobacco cessation. During this 10-minute call, research assistants help participants identify priority health behaviors and set achievable goals. For the following six months, participants receive weekly WhatsApp or WeChat messages to support adherence to their chosen health-related lifestyle changes. Additionally, participants receive 1-minute educational videos specific to their selected health behaviors, which highlight health hazards of continuing risk behaviors and benefits of adopting healthier alternatives. Follow-up assessments occur at 3, 6, and 12 months, with successful participants encouraged to adopt additional healthy behaviors sequentially or simultaneously, depending on their confidence levels.

The control group receives a similar brief telephone intervention based on the AWARD model but with only general health advice rather than personalized guidance. They also receive regular SMS messages containing generic health tips at a frequency matching the intervention group, and undergo identical follow-up assessments. This design allows researchers to isolate the effects of the personalized, theory-based components of the intervention while controlling for attention and contact time. The primary outcome measure is the composite event rate of adopting at least one of four healthy lifestyles (smoking cessation, eliminating binge drinking, consuming adequate fruits and vegetables, or meeting physical activity guidelines) at 6 months post-intervention. Secondary outcomes include the same composite measure at 12 months and improvements in health-related quality of life assessed using the EuroQoL 5-Dimension 5-level questionnaire at both time points.

How Are Outcomes and Data Analyzed?

To enhance validity, the study incorporates objective assessment tools to supplement self-reported outcomes. For smoking cessation, biochemical validation using saliva cotinine levels below 30 ng/ml and exhaled carbon monoxide measurements less than 4 ppm will verify abstinence claims. Participants using medicinal nicotine or e-cigarettes will not be considered successful quitters, and those on nicotine replacement therapy will undergo validation 7 days after completing treatment. The study also employs a mixed-methods approach, with qualitative interviews of 20 purposely selected intervention participants to explore their experiences with the program. These interviews will follow Braun and Clarke's thematic analysis framework using NVivo software for data organization and analysis. Cost-effectiveness analysis will be conducted to evaluate the economic impact of the intervention, providing valuable information for potential scaling and implementation in other healthcare settings.

Statistical analysis will follow intention-to-treat principles, with imputation of all non-responses at follow-up by baseline values to yield conservative effect estimates. Logistic regression will compare event rates between groups, and generalized estimating equations models will assess differential changes in health-related quality of life. Sensitivity analyses will be conducted with adjustment for any baseline demographic and clinical characteristics showing significant differences between groups, and multiple imputation will be used to handle missing data and evaluate the robustness of primary analysis results. The Holm's multiplicity adjustment procedure will control family-wise type I error rates for outcomes repeatedly assessed at different time points.

What Are the Broader Clinical Implications?

This study addresses several critical gaps in current prevention efforts for noncommunicable diseases. By targeting multiple health-risk behaviors simultaneously or sequentially, it acknowledges the interconnected nature of lifestyle factors contributing to NCDs. The use of mobile technology and brief video interventions represents a scalable approach that could be implemented in busy clinical settings with minimal disruption to workflow. The theoretical framework combining planned behavior theory, foot-in-the-door technique, and self-determination theory provides a solid foundation for promoting sustainable behavior change. Furthermore, the focus on Chinese adults helps address the lack of evidence-based interventions for this population, which represents a significant portion of the global population affected by NCDs.

Are There Safety and Ethical Considerations?

Safety considerations have been integrated into the study design, with participants carefully monitored for any potential complications due to lifestyle changes during follow-up calls. Those experiencing complications will be proactively referred to medical physicians in EDs, with the research team assessing their suitability to continue in the study. The trial has received ethical approval from the Chinese University of Hong Kong-New Territories East Cluster Clinical Research Ethics Committee, with all procedures conducted according to the ethical principles of the Declaration of Helsinki.

What Could This Mean for Future Preventive Care?

Could this ED-based intervention model fundamentally change how we approach preventive health in acute care settings? The study's findings may have significant implications for healthcare policy and clinical practice, potentially demonstrating that brief, theory-driven interventions delivered at "teachable moments" can effectively promote multiple healthy lifestyle changes. If proven cost-effective, this approach could be integrated into standard ED protocols, creating new opportunities for NCD prevention at a critical point of healthcare contact. What implementation challenges might arise when attempting to scale such interventions across diverse healthcare systems with varying resources and cultural contexts? How might the cost-effectiveness findings influence decisions about resource allocation for preventive services in emergency care settings?

As the trial progresses toward its expected completion in January 2028, healthcare professionals and policy makers should monitor results closely for insights into how emergency departments might serve not only as centers for acute care but also as gateways to lifestyle modification and chronic disease prevention. The study's comprehensive approach to addressing multiple risk factors, rigorous methodology, and focus on a previously understudied population makes it a potentially significant contribution to global efforts to reduce the burden of noncommunicable diseases.

Summary

This comprehensive clinical trial examines the potential of emergency department visits as opportunities for health behavior intervention. The study involves 1,172 Chinese adults across five Hong Kong hospitals, targeting multiple health-risk behaviors including smoking, alcohol consumption, diet, and physical activity. The intervention group receives personalized guidance through the AWARD model, supplemented with digital communications and educational videos over six months. The control group receives general health advice and SMS messages. The trial employs objective assessment tools and includes cost-effectiveness analysis, with primary outcomes measured at 6 months and follow-up continuing to 12 months. The study aims to provide evidence for integrating preventive health strategies into emergency care settings, potentially transforming how healthcare systems approach noncommunicable disease prevention.