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Study Title and Description

Brief motivational intervention with homeless adolescents: evaluating effects on substance use and service utilization.



Key Questions Addressed
1 Evidence map
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Primary Publication Information
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TitleData
Title Brief motivational intervention with homeless adolescents: evaluating effects on substance use and service utilization.
Author Baer JS., Garrett SB., Beadnell B., Wells EA., Peterson PL.
Country Alcohol and Drug Abuse Institute, University of Washington, Seattle, WA 98105-4631, USA. jsbaer@u.washington.edu
Year 2007
Numbers Pubmed ID: 18072842

Secondary Publication Information
There are currently no secondary publications defined for this study.


Extraction Form: Evidence Map
Arms
Number Title Description Comments
1 MI Brief motivational interview
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2 TAU
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Design Details
Question... Follow Up Answer Follow-up Answer
Should this citation be included? Yes
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Ages eligible (in years) 13
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19
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Total sample size (in all arms) 127
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Age distribution of enrolled population (in years) 17.9
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Substance used Alcohol
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Other ... illicit "street" drugs
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Interventions studied? Behavioral
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No active treatment
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Behavioral
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No active treatment
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Outcome? Self report of use/abstinence and/or intensity
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Self report of use/abstinence and/or intensity
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Age variation of enrolled population (in years) 1.2
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Study type RCT
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Is any arm a brief intervention (or single session)? No
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Income level of country(ies) of origin Upper income
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Upper income
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Results & Comparisons


Results Data
Outcome: nos use days      Population: All Participants
Time Point Measure MI TAU


0 months

Mean 8.7 9.2
SD 8.9 9.8
N Analyzed 75 52


1 months

Mean 12.4 15.6
SD 10.6 12.1
N Analyzed 75 52


3 months

Mean 11.4 15.2
SD 10.4 11.8
N Analyzed 75 52
Outcome: alcohol use days      Population: All Participants
Time Point Measure MI TAU


0 months

Mean 5.8 4.8
SD 6.8 4.8
N Analyzed 75 52


1 months

Mean 3.7 3.5
SD 6.6 6.7
N Analyzed 75 52


3 months

Mean 4.5 2.9
SD 7.1 6.2
N Analyzed 75 52
Outcome: cannabis use days      Population: All Participants
Time Point Measure MI TAU


0 months

Mean 17.4 19.1
SD 11.5 11.1
N Analyzed 75 52


1 months

Mean 13.7 13
SD 11.9 12.9
N Analyzed 75 52


3 months

Mean 14.8 13.2
SD 12.2 12.4
N Analyzed 75 52


Quality Dimensions
Dimension Value Notes Comments
Intention-to-treat-analysis: Bias due to incomplete reporting and analysis according to group allocation No
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Group similarity at baseline (selection bias): Selection bias due to dissimilarity at baseline for the most important prognostic indicators Yes
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Co-interventions (performance bias): Performance bias because co-interventions were different across groups Yes none
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Compliance (performance bias): Performance bias due to inappropriate compliance with interventions across groups No ~50%
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Timing of outcome assessments (detection bias): Detection bias because important outcomes were not measured at the same time across groups Yes
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Additional Bias: Bias due to problems not covered elsewhere in the table. If yes, describe them in the Notes. No
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Random sequence generation (selection bias): Selection bias (biased allocation to interventions) due to inadequate generation of a randomized sequence Low Urn N>100
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Allocation concealment (selection bias): Selection bias (biased allocation to interventions) due to inadequate concealment of allocations prior to assignment Unclear
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Blinding of participants (performance bias): Performance bias due to knowledge of the allocated interventions by participants during the study High
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Blinding of personnel/ care providers (performance bias): Performance bias due to knowledge of the allocated interventions by personnel/care providers during the study. High
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Blinding of outcome assessor (detection bias): Detection bias due to knowledge of the allocated interventions by outcome assessors. Unclear
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Incomplete outcome data (attrition bias): Attrition bias due to amount, nature or handling of incomplete outcome data High 24%
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Selective Reporting (reporting bias): Reporting bias due to selective outcome reporting
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Quality Rating
Guideline Used Overall Rating