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Diabetes, Cardiovascular Risks, and Lipoproteins · Journal article
Diabetes Obesity and Metabolism · August 17, 2026
Well-designed and adequately powered for the question it asks.
In two prospective East Asian cohorts totalling 125,843 participants, metabolic health did not eliminate BMI-related diabetes risk. Diabetes incidence increased significantly even among metabolically healthy individuals at BMI thresholds (22.2 kg/m² in Chinese, 21.8 kg/m² in Japanese) substantially below conventional overweight classification (≥25 kg/m²), suggesting joint assessment of BMI and metabolic health is necessary for accurate diabetes risk stratification in East Asian populations.
Prospective longitudinal cohort study. East Asian adults from two longitudinal cohorts (Chinese and Japanese participants); metabolic health stringently defined as absence of elevated blood pressure, dyslipidaemia, and impaired fasting glucose.. Intervention: BMI and metabolic health status categories (no intervention; observational analysis).. Compared with: Metabolically healthy normal weight (MHNW) used as reference category in Cox models.. n = 125,843. Two longitudinal cohorts; specific geographic locations not detailed in abstract..
Metabolically healthy overweight was associated with incident diabetes in Chinese (HR: 2.33, 95% CI: 1.63–3.33) and Japanese participants (HR: 3.32, 95% CI: 1.50–7.35). Metabolically healthy obesity showed even higher risk in Chinese (HR: 12.40, 95% CI: 6.77–22.68) and Japanese (HR: 27.89, 95% CI: 8.42–92.41). BMI change points for incident diabetes were 22.2 kg/m² in Chinese and 21.8 kg/m² in Japanese metabolically healthy participants, below the conventional overweight threshold of 25 kg/m².
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Clinicians should not rely on metabolic health status alone to exclude diabetes risk in East Asian populations. Joint assessment of BMI and metabolic health is necessary, with awareness that diabetes risk escalates at BMI thresholds approximately 2–3 kg/m² lower than conventional overweight cutoffs (25 kg/m²) in this population.
Large prospective cohort study with rigorous metabolic health definition and hard clinical endpoint (incident diabetes), demonstrating clear dose-response relationships and population-specific BMI thresholds in East Asian adults.
As stated by the source record.
Quoted from the source exactly as published.
Clinicians should not rely on metabolic health status alone to exclude diabetes risk in East Asian populations. Joint assessment of BMI and metabolic health is necessary, with awareness that diabetes risk escalates at BMI thresholds approximately 2–3 kg/m² lower than conventional overweight cutoffs (25 kg/m²) in this population.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
ABSTRACT Aims To determine whether metabolic health attenuates body mass index (BMI)‐related risk of diabetes in East Asian adults and to identify BMI thresholds at which risk increases among metabolically healthy individuals. Materials and Methods We analysed 125 843 adults from two longitudinal cohorts, including 113 354 Chinese and 12 489 Japanese participants. Metabolic health was stringently defined as the absence of elevated blood pressure, dyslipidaemia and impaired fasting glucose. Participants were categorised by BMI and metabolic health status. Cox proportional hazards models estimated hazard ratios (HRs) and 95% confidence intervals (CIs) for incident diabetes, using metabolically healthy normal weight (MHNW) as the reference. Restricted cubic splines assessed non‐linear BMI–diabetes associations by metabolic health status. Results During 352 036 Chinese and 89 483 Japanese person‐years, 1483 and 312 participants, respectively, developed diabetes. In the primary model adjusted for age, gender, smoking, and drinking, compared with MHNW, metabolically healthy overweight was associated with incident diabetes in Chinese (HR: 2.33, 95% CI: 1.63–3.33) and Japanese participants (HR: 3.32, 95% CI: 1.50–7.35). Metabolically healthy obesity (MHO) was also associated with a higher risk (Chinese: HR: 12.40, 95% CI: 6.77–22.68; Japanese: HR: 27.89, 95% CI: 8.42–92.41). The reported change points were 22.2 kg/m 2 in Chinese and 21.8 kg/m 2 in Japanese metabolically healthy participants. Conclusions Metabolic health did not eliminate BMI‐related diabetes risk in East Asian adults. Diabetes risk increased at BMI levels below conventional overweight thresholds, supporting joint assessment of BMI and metabolic health for diabetes risk stratification.
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