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A '''risk factor''' is a variable associated with an increased risk of [[disease]] or [[infection]] but risk factors are not necessarily causal. 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. |
A '''risk factor''' is a variable associated with an increased risk of [[disease]] or [[infection]] but risk factors are not necessarily causal. 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. |
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And non-chicken eaters' risk = 2/35 = 0.057. |
And non-chicken eaters' risk = 2/35 = 0.057. |
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| − | 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. [[Statistics|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 "causes" the disease (for example in a |
+ | 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. [[Statistics|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 "causes" the disease (for example in a British doctors study of the link between smoking and lung cancer). |
The term "risk factor" was first coined by heart researcher Dr. [[Thomas R. Dawber]] in a landmark scientific paper in 1961, where he attributed specific conditions ([[blood pressure]], [[cholesterol]], [[Tobacco smoking|smoking]]) to [[heart disease]]. |
The term "risk factor" was first coined by heart researcher Dr. [[Thomas R. Dawber]] in a landmark scientific paper in 1961, where he attributed specific conditions ([[blood pressure]], [[cholesterol]], [[Tobacco smoking|smoking]]) to [[heart disease]]. |
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| + | ==See also== |
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| − | * [http://www.google.com/search?hl=en&q=define%3Arisk+factor&btnG=Google+Search Definitions of "risk factor" (web)] |
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| + | *[[At risk populations]] |
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| + | *[[Predisposition]] |
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| + | *[[Psychosocial factors]] |
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| + | *[[Susceptibility (disorders)]] |
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| + | ==References & Bibliography== |
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| + | <References/> |
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| + | ==Key texts== |
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| + | ===Books=== |
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| + | |||
| + | ===Papers=== |
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| + | ==Additional material== |
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| + | ===Books=== |
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| + | |||
| + | ===Papers=== |
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| + | *[http://scholar.google.com/scholar?sourceid=mozclient&num=50&scoring=d&ie=utf-8&oe=utf-8&q=arisk+factor Google Scholar] |
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| + | ==External links== |
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[[Category:Epidemiology]] |
[[Category:Epidemiology]] |
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[[de:Risikofaktor]] |
[[de:Risikofaktor]] |
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[[es:Factor de riesgo]] |
[[es:Factor de riesgo]] |
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[[pt:Fator de risco cardiovascular]] |
[[pt:Fator de risco cardiovascular]] |
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[[zh:危险因素]] |
[[zh:危险因素]] |
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{{enWP|Risk factor}} |
{{enWP|Risk factor}} |
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A risk factor is a variable associated with an increased risk of disease or infection but risk factors are not necessarily causal. 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 "causes" the disease (for example in a British doctors study of the link between smoking and lung cancer).
The term "risk factor" was first coined by heart researcher Dr. Thomas R. Dawber in a landmark scientific paper in 1961, where he attributed specific conditions (blood pressure, cholesterol, smoking) to heart disease.
See also
References & Bibliography
Key texts
Books
Papers
Additional material
Books
Papers
External links
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