Does change in hip circumference predict cardiovascular disease and overall mortality in Danish and Swedish women?
Anne Lanfer1, Kirsten Mehlig, Berit L Heitmann
1Department of Public Health and Community Medicine, University of Gothenburg, 405 30, Gothenburg, Sweden.
Insights
Small hip circumference (HC) is linked to higher mortality risk in women, independent of body mass index (BMI). Changes in hip size over time did not affect these health risks.
Area of Science:
- Cardiovascular epidemiology
- Obesity research
- Public health
Background:
- Small hip circumference (HC) is increasingly recognized as a risk factor for cardiovascular disease (CVD), coronary heart disease, diabetes, and premature death in women.
- Previous studies suggest an inverse association between HC and adverse health outcomes, but its presence in normal- and overweight individuals and the impact of changes in HC over time require further clarification.
Purpose of the Study:
- To investigate the association between hip circumference (HC) and the risk of all-cause mortality and cardiovascular disease (CVD) morbidity and mortality in women.
- To determine if this association differs between normal-weight and overweight women.
- To examine whether changes in HC over a six-year period influence morbidity and mortality risk.
Main Methods:
- A pooled analysis of 2,867 women from the DANISH MONICA study and the Prospective Population Study of Women in Gothenburg was conducted.
- Hip circumference (HC) and its 6-year change were assessed in relation to all-cause mortality and CVD-specific morbidity and mortality.
- Data were analyzed using Cox proportional hazards models, with adjustments for body mass index (BMI), waist circumference (WC), and other relevant covariates.
Main Results:
- A significant inverse association was observed between baseline hip circumference (HC) and both all-cause and CVD-specific mortality, even after adjusting for BMI, waist circumference (WC), and other factors.
- This inverse association between small HC and mortality risk was less pronounced in women with a body mass index (BMI) exceeding 25 kg/m2.
- Changes in hip size over the six-year follow-up period were not found to be significantly associated with mortality or morbidity endpoints.
Conclusions:
- The findings suggest a baseline risk associated with small hip circumference (HC) that is independent of changes in gluteofemoral body mass.
- This implies that the risk conferred by small HC may not be modifiable through changes in body composition in this region.
- The study highlights the importance of considering hip circumference as a distinct risk factor for cardiovascular disease and mortality in women.
Objective:
Accumulating evidence consistently shows that small hip circumference (HC) is related to increased risk of cardiovascular disease (CVD), coronary heart disease, diabetes, and premature death in women. This study aims to clarify whether this inverse association can be found in both normal- and overweight individuals and if change in HC over time relates to morbidity and mortality risk.
Methods:
HC and 6-year change in HC in relation to the risk for all-cause mortality and CVD morbidity and mortality was investigated in a pooled sample of 2,867 women from the DANISH MONICA study and the Prospective Population Study of Women in Gothenburg with a total of 66,627 person-years of follow-up.
Results:
Baseline HC was significantly and inversely associated with all-cause and CVD-specific mortality after adjustment for BMI, waist circumference (WC), and other covariates. In stratified analyses, the inverse association was weaker in women with a BMI of more than 25 kg/m2. Six-year change in hip size was not associated with mortality or morbidity endpoints.
Conclusions:
Our results imply the existence of a basal risk associated with small hip size, which is, however, independent from changes in gluteofemoral body mass and therefore unlikely to be modifiable.
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