London (BBC): Poor sleep in teenage years could be an early warning sign for illicit drug use and regretful behaviour, research suggests. US scientists found adolescents with bad sleep habits were more likely to engage in risky behaviour in the years to come than those who slept soundly.  They say parents should pay closer attention to teens’ sleep schedules. Other research suggests a good night’s sleep is key to making good judgements. Writing in the journal Alcoholism: Clinical and Experimental Research, scientists analysed data from more than 6,500 adolescents in the United States.

They tracked sleep patterns and drug use through a large nationwide survey conducted in three waves between 1994 and 2002.