News tagged with risk factors
A new study looking at the genomes of more than 13,000 men identified four new genetic variants associated with an increased risk of testicular cancer, the most commonly diagnosed type in young men today. The findings from ...
Genetics May 12, 2013 | 5 / 5 (1) | 0 |
(Medical Xpress)—UCLA life scientists have identified a gene previously implicated in Parkinson's disease that can delay the onset of aging and extend the healthy life span of fruit flies. The research, ...
Genetics May 06, 2013 | 4.8 / 5 (18) | 1 |
Researchers at Washington University School of Medicine in St. Louis have identified a new set of genetic markers for Alzheimer's that point to a second pathway through which the disease develops.
Alzheimer's disease & dementia Apr 04, 2013 | 5 / 5 (2) | 0 |
Researchers have identified genetic risk factors that may accelerate a teen's progression to becoming a lifelong heavy smoker.
Psychology & Psychiatry Mar 27, 2013 | not rated yet | 0 |
The gene most strongly linked to obesity and overeating may also increase the risk of malignant melanoma – the most deadly skin cancer, reveals research published in Nature Genetics.
Genetics Mar 04, 2013 | 5 / 5 (1) | 0 |
Professor Michael Jennings, Deputy Director of the Institute for Glycomics at Griffith University, was part of an international team that discovered the previously unknown pathway of how the bacterium colonizes people.
Medical research May 23, 2013 | 5 / 5 (2) | 0 |
(Medical Xpress)—The first symptoms of major depression may be behavioral, but the common mental illness is based in biology—and not limited to the brain.
Psychology & Psychiatry May 23, 2013 | 4.9 / 5 (9) | 0 |
Researchers at the University of Wisconsin have identified a potential new risk factor for obstructive sleep apnea: asthma. Using data from the National Institutes of Health (Heart, Lung, and Blood Institute)-funded Wisconsin ...
Sleep apnea May 19, 2013 | 5 / 5 (1) | 0 |
(HealthDay)—Blood levels of free fatty acids are associated with insulin resistance during young adulthood and cardiovascular risk factors in later adulthood, according to a study published online May 13 ...
Cardiology May 17, 2013 | not rated yet | 0 |
People in the military who suffer more than one mild traumatic brain injury face a significantly higher risk of suicide, according to research by the National Center for Veterans Studies at the University of Utah.
Psychology & Psychiatry May 15, 2013 | 5 / 5 (1) | 0 |
Having too much body fat makes arteries become stiff after middle age, a new study has revealed.
Cardiology May 15, 2013 | 5 / 5 (4) | 0 |
(HealthDay)—Women who come down with the flu during pregnancy may be at increased risk of having a child who develops bipolar disorder, a new study suggests.
Psychology & Psychiatry May 08, 2013 | 5 / 5 (1) | 0 |
(Medical Xpress)—A new University of Arizona study, published in the journal Neurology, suggests a possible link between elevated blood sugar levels and risk for developing Alzheimer's disease.
Alzheimer's disease & dementia May 06, 2013 | not rated yet | 0 |
Elderly patients who receive anesthesia are no more likely to develop long-term dementia or Alzheimer's disease than other seniors, according to new Mayo Clinic research. The study analyzed thousands of patients using the ...
Alzheimer's disease & dementia May 01, 2013 | not rated yet | 1 |
The mantra that quality is more important than quantity is true when considering how social relationships influence depression, say U-M researchers in a new study.
Psychology & Psychiatry Apr 30, 2013 | 4.2 / 5 (5) | 0 |
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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