A variety of factors have been found to be predictive of drug use, including age, gender, socioeconomic status, and peer pressure. However, the strongest predictor of drug use is previous drug use. This is because people who have used drugs in the past are more likely to use them again in the future. In addition, previous drug use is also a risk factor for developing an addiction. Therefore, it is important to be aware of the dangers of drug use and to avoid using drugs if possible.