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Coffee Intake and Obesity: A Meta-Analysis.
Ariel Lee1, Woobin Lim2, Seoyeon Kim3
1Dartmouth College, Hanover, NH 03755, USA. ariel.lee.21@dartmouth.edu.
Nutrients
|June 15, 2019
Summary
Higher coffee consumption may be linked to slightly lower body fat, especially in men. This meta-analysis reviewed 12 studies on coffee intake and obesity measures like body mass index and waist circumference.
Area of Science:
- Nutrition Science
- Epidemiology
- Public Health
Background:
- Coffee is a widely consumed beverage with a debated association with obesity.
- Previous studies show inconsistent results regarding coffee intake and obesity.
- A systematic summary of existing evidence is needed.
Purpose of the Study:
- To systematically evaluate the relationship between coffee consumption and obesity indicators.
- To synthesize findings from multiple epidemiological studies using meta-analysis.
Main Methods:
- A meta-analysis was conducted on 12 epidemiological studies identified from PubMed and Embase.
- Obesity was assessed using body mass index (BMI) and waist circumference (WC).
- Data were analyzed using random effects models to calculate weighted mean differences and relative risks.
Main Results:
- Higher coffee intake showed a modest inverse association with BMI (WMD -0.08) and WC (WMD -0.27).
- The association was more pronounced in men, with significant inverse associations for both BMI and WC.
- For binary outcomes, the relative risk for highest vs. lowest coffee intake categories was 1.49 for BMI and 1.07 for WC, indicating a potential but not statistically significant increase.
Conclusions:
- Higher coffee intake may be associated with reduced adiposity, particularly central adiposity (WC).
- This association appears stronger in men.
- Further research may clarify the mechanisms behind coffee's potential role in weight management.
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