XI-ROR-05m2fqn25-NIHR207031 Chiang Mai University In an effort to tackle the growing burden of cardiovascular disease, Thailand’s policy makers are planning to offer behavioural support to overweight individuals. Our evaluation of their planned intervention suggested low levels of engagement among end-users due to inadequate intensity and quality of support. Digital technology could be used to address these limitations economically but requires careful consideration of the context to ensure equitable participation of digitally underserved groups such as the elderly, rural/remote, and low-income populations. We will work with Thailand’s policy makers and healthcare providers to develop their proposed weight management intervention into state-of-the-art technology-enabled interventions that can deliver clinically important weight loss economically and reduce cardiovascular risk for diverse populations in Thailand. The specific objectives are to: - Undertake context (behavioural, technological, and organisational) analysis to inform intervention development - Co-create technology-enabled interventions for two price points being considered by the Thai policy makers, and assess their acceptability to diverse socio-demographic groups - Evaluate the effectiveness of intervention using a cluster randomised trial - Conduct economic evaluation and develop service standards for the interventions Overweight (defined by Asian cut-off of body mass index greater than 23 kg/m2) adults over the age of 35 years. National Institute for Health and Care Research London School of Hygiene and Tropical Medicine Chiang Mai University University of Leeds National Science and Technology Development Agency Ministry of Public Health, Thailand Walailak University University of Health Sciences, Laos University of Health Sciences, Cambodia Mahidol University, Thailand 303152 401923 657724 541624 328529 101335.59 64910.32