Across 16 Middle East and North Africa countries, cardiometabolic risk trajectories in young adults are splitting sharply along sex lines. In men aged 20–29, obesity prevalence rose at +3.49% per year — significantly faster than the rest of the world — while diabetes in men aged 30–39 accelerated at +1.90%/year. Women showed the opposite pattern: hypertension and non-HDL cholesterol declined faster than global peers, with 52 of 64 country-level non-HDL cells showing probable or very probable decreases since 1990. Five of six divergent findings survived multiple-testing correction across 16 nations analyzed using NCD-RisC modeled data.
This finding lands in a region already flagged by INTERHEART-Middle East as having the youngest age at first heart attack globally — a sobering baseline that makes accelerating male obesity trajectories particularly alarming. The sex asymmetry is striking and underexplored: it may reflect differential urbanization, labor-market changes driving sedentary male employment, or evolving female health-seeking behavior, though this analysis cannot disentangle causation. Limitations are significant: NCD-RisC estimates are modeled, not directly measured, and conflict-affected states (Syria, Yemen) introduce data quality uncertainty. The study covers through 2018–2022 depending on the risk factor, missing post-COVID metabolic shifts. As a preprint not yet peer-reviewed, conclusions remain provisional. Still, the scale — 16 nations, robust joinpoint regression, posterior probability confirmation — makes this more than incremental. It signals a potential public health emergency specifically targeting young MENA men.