Developing Field Tools for Real-Time Assessment of Exposure to Psychosocial Stress and Drug Use in an Outpatient Treatment Population
Public ClinicalTrials.gov record NCT00787423. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Background: \- Researchers are interested in developing more accurate methods to assess environmental influences on psychological stress and drug use. One key to a more accurate assessment of environmental influences is minimizing the delay between exposure and reporting. Portable devices such as personal digital assistants (PDAs) and global positioning system (GPS) units may be able to provide a more real-time image of these factors. Objectives: \- To assess the use of PDAs to measure stress and drug use, and GPS units to assess the effects of neighborhood environment in an outpatient treatment population. Eligibility: * Individuals from 18 to 75 years of age who are current heroin users seeking treatment for addiction and who spend most of their time in Baltimore city. * Participants must be able to visit the research and treatment center at least three times per week for regular tests. Design: * Participants will be in the study for approximately 28 weeks (7 months). * A series of three laboratory session examining responsiveness to standardized stressors will occur both early in treatment and will be repeated late in treatment. * Participants will undergo 18 weeks of daily methadone maintenance. Urine samples will be collected three times weekly. * To track drug use, stress, and geographical location (a measure of environmental risk), each participant will carry a PDA and a GPS unit for 16 of the 18 weeks. Participants will make entries (1) each time that they use a drug and (2) each time they feel overwhelmed, anxious, or stressed more than usual. Participants will also make three random-signal-triggered recordings per day and one brief (end of day) recording. * Retrospective self-report questionnaires on drug use and stress will be given regularly. * After 18 weeks of methadone maintenance, participants will discontinue carrying the PDA and GPS unit and will have the choice of transferring to a community clinic or undergoing a 10-week taper from methadone at the research clinic. Participants who stay for the taper will continue to provide urine samples, but only once a week.
Study identification
- NCT ID
- NCT00787423
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 373 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jul 13, 2009
- Primary completion
- Not listed
- Completion
- Not listed
- Last update posted
- Aug 31, 2026
Started 2009
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| National Institute on Drug Abuse | Baltimore | Maryland | 21224 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
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About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00787423, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Aug 31, 2026 · Synced Sep 13, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00787423 live on ClinicalTrials.gov.