High BMI & Obesity: Mortality Risk Not Always Increased
- this self-check summarizes key findings from research presented at the European Association for the Study of Diabetes (EASD) meeting regarding the relationship between Body Mass Index (BMI) and...
- * "Fat but Fit" is Possible: The study suggests that individuals in the overweight category, and even some with obesity, may not have a higher mortality risk than...
- BMI Categories (as defined in the study): BMI categoryRange (kg/m2)Underweight
Self-Check: “Fat But Fit” & BMI Mortality Risk
this self-check summarizes key findings from research presented at the European Association for the Study of Diabetes (EASD) meeting regarding the relationship between Body Mass Index (BMI) and mortality risk.
Key Takeaways:
* “Fat but Fit” is Possible: The study suggests that individuals in the overweight category, and even some with obesity, may not have a higher mortality risk than those with a BMI in the upper end of the normal weight range.
* U-Shaped curve: The relationship between BMI and mortality isn’t linear. Both underweight and obesity are associated with increased mortality risk. Interestingly, even within the “normal” weight range, lower BMIs showed increased risk.
* Shifting Optimal BMI: The traditionally accepted optimal BMI range (20-25) might potentially be shifting upwards due to advancements in medical care and overall health improvements.
* Study Details: The research analyzed data from 85,761 individuals in Denmark (81.4% female, median age 66.4 years) over a five-year follow-up period.
BMI Categories (as defined in the study):
| BMI category | Range (kg/m2) |
|---|---|
| Underweight | < 18.5 |
| Normal Weight | 18.5 – < 25.0 |
| Overweight | 25.0 – < 30.0 |
| obesity | ≥ 30.0 |
Mortality Risk Compared to Reference Population (BMI 22.5 – <25.0):
| BMI Category | Mortality risk |
|---|---|
| Underweight (<18.5) | 2.73x higher |
| 18.5 – <20.0 | 2x higher |
| 20.0 – <22.5 | 27% higher |
| Overweight (25 – <30) | No higher risk |
| Obesity (30 – <35) | No higher risk |
| Severe Obesity (≥40) | 2.1x higher |
Meaningful Considerations:
* The study focused on a specific population (Denmark) and may not be generalizable to all populations.
* BMI is not a perfect measure of health. It doesn’t account for factors like muscle mass, body composition, or overall fitness.
* The research highlights the complexities of the relationship between weight and health,suggesting that focusing solely on BMI may be an oversimplification.
* Underweight and severe obesity still carry significant health risks.