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August 30th, 2007

For many years doctors have been assessing the role cholesterol plays in health by referring to the Total Cholesterol level.

A Total Cholesterol (TC) in excess on 5.5mmol/l is itself a risk factor for heart disease. But knowing your Total Cholesterol level is NOT enough.

To fully understand the effect of cholesterol has on your risk profile, you must also know the relationship between the Total Cholesterol and HDL Cholesterol. This is TC: HDL


TC:HDL ratio

Ideal Range

< 3.5

Acceptable Range

3.5 - 5.5

Needing Attention

> 5.5

An individual with a TC of 5.4mmol/l and HDL of 1.80mmol/l will have a TC:HDL ration of 3.0 which requires no attention. However, a person with a TC of 5.4mmol/l and HDL of 0.77mmol/l has a TC:HDL ratio of 7.0 which does require attention.

An HDL cholesterol level less than 1.0 mmo1/l is also considered a risk factor for the heart disease. Your aim is to decrease you ratio by increasing your HDL Cholesterol and decreasing your Total Cholesterol.

What is a good TC: HDL ratio?

Ideal Ratio:
Less than 3.5 - is associated with a less than half the average risk of developing heart disease.

Average Ratio:
3.5 - 5.0 - is associated with an average risk of developing heart disease - a 25% chance by the age of 60.

Marginal Ratio:
Between 4.5 and 9.6 - is associated with twice the average risk of development heart disease by the age of 60 - a 50% chance.

Dangerous Ratio:
Between 7.0 and 15.0 - is associated with tripled average risk for developing heart disease by the age of 60 years.

Anyone who has any cardiovascular disease, such as coronary heart disease, peripheral vascular disease (disease in the blood vessels that supply the limbs) or stroke, should have their cholesterol measured by a doctor.

Anyone, even children, with a family history of familial hypercholesterolaemia should have their cholesterol measured.

Anyone aged 35 or over should consider having their cholesterol measured if they have one or more of the following risk factors: family history of early heart disease, diabetes, high blood pressure, smoking.

A healthy lifestyle - exercising on most days, eating a low fat diet, not smoking and drinking alcohol within the recommended limits - will help reduce your risk of coronary heart disease.

source: bupa

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