The Study
Association Between Hepatic Steatosis and Deterioration of Metabolic Health in Obese Individuals: A 12‐Year Follow‐Up of the Tehran Lipid and Glucose Study
This study watched a group of obese people for 12 years and noticed that those with fatty livers were more likely to get other health problems later. But it didn’t make anyone’s liver worse on purpose — it just watched what happened, so we can’t say the fatty liver caused the problems, only that they often happened together.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
Some obese people seem healthy at first, but many become unhealthy later. This study looked at what makes that happen.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 560 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — if you're obese and have fatty liver or high insulin resistance, you're much more likely to develop diabetes or heart disease soon.
- 272% of obese but healthy people became unhealthy in under 5 years.
- 3Those with more liver fat (FLI ≥60) had a 37% higher risk.
- 4Those with high insulin resistance (TyG index) had over 3 times higher risk.
- 5Men and less active people were also at higher risk.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Endocrinology, Diabetes & Metabolism
Year
2026
Authors
B. Abiri, Mohammad Nikoohemmat, M. Mahdavi, Amirhossein Ramezani Ahmadi, M. Valizadeh, F. Azizi, F. Hosseinpanah
Related Content
Claims (5)
The Fatty Liver Index, which uses waist size, triglyceride levels, body mass index, and liver enzyme levels, identifies people transitioning from healthy to unhealthy obesity, but its accuracy decreases when other metabolic markers are considered because it shares features with metabolic syndrome.
Obese adults who are initially metabolically healthy but have low physical activity levels are more likely to develop metabolic dysfunction over nearly five years, compared to those with higher activity levels, regardless of their initial metabolic markers or liver fat content.
Obese adults with a Fatty Liver Index score of 60 or higher have a 37% higher rate of developing metabolic dysfunction over nearly five years, even after accounting for age, sex, physical activity, and insulin resistance.
People with a higher triglyceride-glucose index at the start of the study were more than three times as likely to develop metabolic problems over nearly five years, even if they started with obesity without other metabolic issues.
Metabolically healthy obesity is a temporary condition in which high insulin levels compensate for metabolic dysfunction, eventually leading to worsening metabolic health.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.