Insulin Resistance and Heart Disease in Older Women
Author Information
Author(s): Debbie A Lawlor, Abigail Fraser, Shah Ebrahim, George Davey Smith
Primary Institution: Department of Social Medicine, University of Bristol
Hypothesis
What are the independent associations of fasting insulin, glucose, and glycated haemoglobin with coronary heart disease and stroke in older women without diabetes?
Conclusion
Insulin resistance is a more important risk factor for coronary heart disease and stroke in older women than fasting glucose or glycated haemoglobin.
Supporting Evidence
- Fasting insulin levels were associated with coronary heart disease and stroke events.
- Fasting glucose and glycated haemoglobin were not associated with these outcomes.
- The study included a large sample of older women, a group often neglected in cardiovascular research.
- Insulin resistance was identified as a key mechanism linking type 2 diabetes to cardiovascular disease.
Takeaway
This study found that older women who have high insulin levels are more likely to have heart problems, while sugar levels in the blood don't seem to matter as much.
Methodology
A prospective cohort study was conducted with 3,246 British women aged 60–79 years, free of coronary heart disease, stroke, and diabetes, to assess the associations of fasting insulin, glucose, and glycated haemoglobin with cardiovascular outcomes.
Potential Biases
The study may have underestimated the true association due to regression dilution bias.
Limitations
The study had only one baseline measurement of each exposure variable and a limited number of incident cases of stroke.
Participant Demographics
Participants were British women aged 60-79 years, predominantly white, with a socioeconomic distribution matching that of the general population.
Statistical Information
P-Value
0.09
Confidence Interval
95% CI 1.02–1.33
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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