Table 3 Overview of protocol measures

Feasibility

Participation rates

Percent of parents who participate in the study

Parent engagement

Number of coaching sessions attended, online usage of PW and parent message board (i.e., logins, sessions completed, page views, time spent), number of texts viewed

Acceptability

Withdrawal rates

Percent of parents who withdraw from study

Exit interviews (open trial only)

Open-ended questions on perceptions of in-person sessions, text messages, computer program, and online message board

CSQ

Satisfaction with treatment delivery and ability to manage their adolescent’s problems

Adolescent substance use

GAIN days of use

Days of alcohol use, marijuana use, and other drug use

GAIN SFS

Averages percent of past 90 days during which there was use of alcohol, marijuana, or heavy drugs; intoxication; and failure to perform activities due to use

Gain SUDS

Assesses substance use disorder symptoms in line with both DSM-IV and DSM-V criteria

Biological markers

Saliva alcohol screens (12 h window) and 8 panel urine drug screens testing for marijuana, MDMA, cocaine, amphetamines, methamphetamines, opiates, oxycodone, and benzodiazepines

Adolescent high-risk behavior

GAIN risky sex

Series of items about risky sexual behavior over the past 90 days including number of partner, number of sexual contacts, and number of times had unprotected sex

GAIN days legal

Days of legal involvement over the past 90 days

GAIN days school

Days of school attendance/truancy over past 90 days

Parenting

PMQ

Parental monitoring and sources of parental monitoring

PAC

Assesses positive and negative aspects of general parent-teen communication

FAsTask video code

In vivo problem solving tasks focused on: limit setting; substance use norms; monitoring and listening