News tagged with risk factors

Related topics: heart disease , patients , women , heart attack , cardiovascular disease

Gout linked to heightened diabetes risk

Gout is linked to a heightened risk of type 2 diabetes, suggests research published online in the Annals of the Rheumatic Diseases. The magnitude of the association seems to be significantly greater in women, among whom t ...

Oct 02, 2014
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More HIV+ patients undergoing spinal fusion

(HealthDay)—More HIV-positive patients are undergoing spinal fusions, and these patients have higher rates of complications resulting from the procedures, according to a study published in the Sept. 15 ...

Sep 25, 2014
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Cryptogenic strokes may find explanation in the heart

More than half of the patients who have suffered a stroke with no well-defined aetiology have an enlarged left atrial appendage of the heart, according to a Finnish study. The results indicate that the enlargement of the ...

Sep 25, 2014
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Risk factor

A risk factor is a variable associated with an increased risk of disease or infection. Risk factors are correlational and not necessarily causal, because correlation does not imply causation. For example, being young cannot be said to cause measles, but young people are more at risk as they are less likely to have developed immunity during a previous epidemic.

Risk factors are evaluated by comparing the risk of those exposed to the potential risk factor to those not exposed. Let's say that at a wedding, 74 people ate the chicken and 22 of them were ill, while of the 35 people who had the fish or vegetarian meal only 2 were ill. Did the chicken make the people ill?

So the chicken eaters' risk = 22/74 = 0.297 And non-chicken eaters' risk = 2/35 = 0.057.

Those who ate the chicken had a risk over five times as high as those who did not, suggesting that eating chicken was the cause of the illness. Note, however, that this is not proof. Statistical methods would be used in a less clear cut case to decide what level of risk the risk factor would have to present to be able to say the risk factor is linked to the disease (for example in a study of the link between smoking and lung cancer). Even then, no amount of statistical analysis could prove that the risk factor causes the disease; this could only be proven using direct methods such as a medical explanation of the disease's roots.

The earliest use of risk factor analysis dates back to Avicenna's The Canon of Medicine (1020s), though the term "risk factor" was first coined by heart researcher Dr. Thomas R. Dawber in a landmark scientific paper in 1961, where he attributed heart disease to specific conditions (blood pressure, cholesterol, smoking).

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