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[A prospective study on body mass index and mortality]
Liancheng Zhao1, Beifan Zhou, Yangfeng Wu
1Department of Epidemiology, Fu Wai Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100037, China.
Summary
Maintaining a normal body mass index (BMI) is linked to lower mortality risks from all causes, cardiovascular disease, and cancer. This finding highlights the public health importance of healthy weight management.
Area of Science:
- Public Health
- Epidemiology
- Biostatistics
Context:
- The study investigated the association between Body Mass Index (BMI) and mortality rates in a large Chinese cohort.
- Over 30,000 participants aged 35-59 were followed for an average of 15.2 years to document mortality causes.
Purpose:
- To assess the relationship between Body Mass Index (BMI) and all-causes mortality, as well as cause-specific mortality.
- To identify optimal BMI ranges for reduced mortality risk in the Chinese population.
Summary:
- A "U" shaped relationship was observed between BMI and all-causes mortality, with the lowest risk in the normal BMI range (18.5-23.9).
- Low BMI (<18.5) showed a non-significant increased risk, while obesity (BMI ≥28) was associated with a significantly increased risk of all-cause mortality.
- Cardiovascular disease mortality risk increased with higher BMI, whereas cancer mortality risk decreased with increasing BMI.
Impact:
- The findings underscore the public health significance of maintaining a normal BMI for reducing overall mortality.
- Normal BMI is associated with lower risks of cardiovascular disease, cancer, and other causes of death.
- These results provide crucial data for public health interventions and guidelines in China and potentially other Asian populations.