In statistics, controlling for a variable is the attempt to reduce the effect of confounding variables on an observational study. It means that when looking at the effect of one variable, all other variable predictors are held constant.n statistics, controlling for a variable is the attempt to reduce the effect of confounding variables on an observational study. It means that when looking at the effect of one variable, all other variable predictors are held constant.
100,000 people a year die from alcohol abuse in the U.S. each year, 1,000,000 in ten years. 14 million, or one in 13 adults in the U.S. suffer from alcoholism at any given time. 25% of urban hospital beds are taken up by severe damage from the use of alcohol.
Every day, 28 people in the United States die in motor vehicle crashes that involve an alcohol-impaired driver. This is one death every 51 minutes.1 The annual cost of alcohol-related crashes totals more than $44 billion.2. Thankfully, there are effective measures that can help prevent injuries and deaths from alcohol-impaired driving.