Body mass index and coronary heart disease risk score: the Tromsø study, 1979 to 2001
1Institute of Community Medicine, University of Tromsø, N-9037 Tromsø, Norway. tom.wilsgaard@ism.uit.no
Insights
Weight gain increases coronary heart disease (CHD) risk. Longitudinal studies show rising body mass index (BMI) is linked to higher CHD risk scores in adults, particularly in older women.
Area of Science:
- Cardiology
- Public Health
- Epidemiology
Background:
- Rising obesity rates present a significant public health challenge.
- Understanding the long-term impact of weight changes on cardiovascular health is crucial.
Purpose of the Study:
- To investigate the relationship between changes in body mass index (BMI) over time and alterations in coronary heart disease (CHD) risk.
- To utilize the Framingham risk score equation to quantify CHD risk.
Main Methods:
- Longitudinal study involving 10,214 adults in Tromsø, Norway, with data collected over four examination periods (1979-2001).
- Participants aged 20-61 years at baseline attended at least three examinations.
- Fixed-effects regression models were employed to analyze longitudinal data.
Main Results:
- A significant association was found between BMI change and CHD risk score change across all baseline age groups.
- This association was more pronounced with increasing age in women compared to men.
- A 3 kg/m² increase in BMI correlated with a 0.45-point increase in CHD risk score for men and 0.66 points for women aged 40-49.
Conclusions:
- Increased body weight over time is demonstrably linked to adverse coronary heart disease risk in both genders.
- The findings underscore the importance of weight management for cardiovascular disease prevention.
Purpose:
The purpose of the study is to examine the association between longitudinal change in body mass index (BMI) and change in coronary heart disease (CHD) risk score by using the Framingham risk score equation.
Methods:
A general adult population in the municipality of Tromsø, Norway, was invited to four consecutive examinations in 1979 to 1980, 1986 to 1987, 1994 to 1995, and 2001. A total of 10,214 men and women aged 20 to 61 years at baseline attended at least three times. Associations were examined by using fixed-effects regression methods for longitudinal data.
Results:
We observed a significant association between BMI change and risk score change in all baseline age groups. The association was significantly strengthened by age in women, but not men. A BMI increase of 3 kg/m(2) in subjects aged 40 to 49 years was associated with risk score increases of 0.45 points (95% confidence interval [CI], 0.29-0.62) in men and 0.66 points (95% CI, 0.52-0.80) in women.
Conclusions:
The well-known increase in body weight is associated with adverse CHD risk in both men and women.
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Obesity
