Rethinking obesity: comparison of the new clinical obesity framework with traditional body mass index (BMI)-based classifications in midlife UK adults
Authors' conclusion
Findings suggest the clinical framework may offer a more meaningful and risk-relevant population-level classification of obesity. Findings have implications for clinical care, epidemiological research, and public health prevention strategies.
Study context
- Population
- Midlife UK adults at age 46 in the 1970 British Cohort Studyage 46 data from the 1970 British Cohort Study
- Participants
- 6,978 adults
- Exposure
- Lancet clinical obesity framework vs standard BMI categories
- Outcome
- Prevalence by clinical framework
- Follow-up
- Age 46
Main finding
As reported in the abstract
Observational data: associations, not effects.
Further findings
Prevalence by BMI categories · age 46
| Outcome | OR (95% CI) | |
|---|---|---|
| Five-year mortality · five yearsPre-clinical obesityvs No obesityUnadjusted; comparator not explicitly stated · unadjusted models | 2.82 (0.93–12.2) | |
| Five-year mortality · five yearsClinical obesityvs No obesityUnadjusted; comparator not explicitly stated · unadjusted models | 5.17 (1.54–23.3) | |
| 0.050.21520Odds ratio (log scale) |
Classification discordance
- Of those with BMI-defined obesity, met criteria for clinical obesity
- 31.4%
- Of those with BMI-defined obesity, considered pre-clinical
- 68.6%
- The BMI overweight group also included individuals with no obesity and clinical obesity, indicating bidirectional discordance between definitions
Five-year mortality · five years
- BMI categories were not associated with higher five-year mortality
Original publication
Rethinking obesity: comparison of the new clinical obesity framework with traditional BMI-based classifications in midlife UK adults. Int J Obes (Lond). Published 11 November 2026. doi:10.
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