A screening instrument for drug use that uses only two questions appears to have excellent statistical properties for screening for drug use, according to a study. The screening tool asks patients about days of drug use (other than alcohol) in the past 12 months and drugs that were used more than they were meant to be used. The instrument was 100% sensitive and 94% specific for drug use disorders among primary care patients. It was also 93% sensitive and 96% specific for negative consequences of drug use.

Source: JAMA Internal Medicine, August 2015.