NMR Metabolomics-Based Risk Assessment and Stratified Digital Health Interventions in Middle-Aged Adults (PREMAP)

The study addresses an evidence gap: no published pragmatic, randomized trial has directly compared digital lifestyle intervention platforms in a population prospectively risk-stratified through NMR metabolomics in a real-world public-sector setting. PREMAP combines a prospective, population-based cohort (all enrolled participants, followed regardless of risk group) with an embedded pragmatic, open-label, three-arm randomized controlled trial restricted to participants classified as moderate or high multi-disease risk. The non-randomized low-risk group receives its risk result and general health information and is followed as a naturalistic reference group; withholding a risk result or randomizing this group to an active digital intervention was judged neither scientifically nor ethically justified. At the population cohort level, the study evaluates change from baseline to 6 months in the five NMR-derived disease-specific risk predictions and in the WHO-5 wellbeing score across all enrolled participants. Within the embedded randomised substudy, the three digital health arms are compared head-to-head on the same two outcome domains at 6 months, adjusting for guideline-directed medical therapy status and relevant covariates. Secondary objectives include patient-reported outcomes (health-related quality of life, work productivity, health activation, life satisfaction), clinical and health-register-based outcomes (incident diagnoses, new prescriptions, hospitalization, sickness absence) over at least 12 months, and a health economic evaluation using patient-level Monte Carlo microsimulation to estimate cost per quality-adjusted life year (QALY) gained, from both healthcare payer and societal perspectives.