• Percentage days abstinent of substance use [ Time Frame: 90 days ] [ Designated as safety issue: No ]
  

• Rate of cessations of substance use [ Time Frame: 90 days ] [ Designated as safety issue: No ]
  
• Rate of initiation of substance use [ Time Frame: 90 days ] [ Designated as safety issue: No ]
  
• Driving under the influence or riding with a driver under the influence [ Time Frame: 90 days ] [ Designated as safety issue: Yes ]
  

Since the restoration of democratic government in 1989, the Czech Republic has moved politically and economically closer to the West. Accompanying these profound social changes has been a sharp increase in rates of drug use by Czech teens, resulting in an urgent need to develop and test new prevention strategies.

The specific aims of the supplemental project are:

1. To translate into Czech (and back-translate) the computerized CRAFFT screening program and all study measurements; to develop Czech versions of adolescent and parent educational materials, and to produce a Czech version of the provider training protocol;

2. To conduct a controlled trial of the comprehensive screening and brief advice intervention, developed by CeASAR, in a group of pediatric offices in the greater Prague area. We hypothesize that:

   1. Among 12-18 year old well care patients who screen positive for drug/alcohol use, the experimental intervention administered by trained primary care providers will be more effective than standard care in decreasing drug and alcohol use as measured by the Timeline Followback4 method;
   2. Among 12-18 year old well care patients who screen negative for drug/alcohol use, the experimental intervention administered by trained primary care providers will be more effective than standard care in decreasing initiation of drug and alcohol use as measured by self-reports of substance use;
   3. Among 12-18 year old well care patients who are at risk for driving/riding while impaired (DRWI), the experimental intervention administered by trained primary care providers will be more effective than standard care in decreasing DRWI risk behavior as measured by a standardized scale.
3. To determine the criterion validity of the CRAFFT screen among Czech youth.