ctn 0015: preliminary findings from the “women and trauma” study denise hien, ph.d. research...

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CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University School of Social Work Executive Director, Women’s Health Project Treatment and Research Center, Addiction Institute of New York, St. Luke’s\Roosevelt Hospital Center St. Petersburg, Florida December 7, 2006 PLEASE DO NOT CITE CONTENTS OF PRESENTATION WITHOUT PERMISSION OF THE AUTHOR

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Page 1: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

CTN 0015: Preliminary findings from the “Women and Trauma” Study

Denise Hien, Ph.D.Denise Hien, Ph.D.

Research Scientist, Social Intervention Group,Columbia University School of Social Work

Executive Director, Women’s Health Project Treatment and Research Center, Addiction Institute of New York, St. Luke’s\Roosevelt Hospital Center

St. Petersburg, FloridaDecember 7, 2006

PLEASE DO NOT CITE CONTENTS OF PRESENTATION WITHOUT PERMISSION OF THE AUTHOR

Page 2: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

“The past isn’t dead, it isn’t even past.”

-William Faulkner

Page 3: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Scope of the Problem1 in 2 women in the U.S. experience some type of traumatic event (Kessler, 1995)

Approximately 33% of females under age 18 experience sexual abuse (Finkelhor, 1994; Wyatt, 1999)

Prevalence rates of PTSD in community samples have ranged from 6% to 36% (Breslau, 1991; Kilpatrick, 1987; Norris, 1992; Resnick, 1993)

Studies have documented PTSD rates among substance using populations to be between 14%-60% (Brady, 2001; Donovan,

2001; Najavits, 1997; Triffleman, 2003)

Page 4: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Neurobiological Changes in Response to Traumatic Stress

Limbic System -- Hippocampus and Amygdala (Affect and Memory, e.g, Ledoux, 2000; van der

Kolk, 1996)

Neurotransmitters and Peptides (Numbing and Depression, e.g., Pitman, 1991, Southwick, 1999)

Changes in Hormonal System (HPA axis) (Arousal, e.g., Yehuda, 2000)

Page 5: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Historical Context for the Study of Trauma & Addiction

1970 1980 1990

DSM-IIIR broadens criteria for

PTSD

Miller’s work with criminal justice

population

Women’s movement and

grassroots advocacy for

battered women

Crack/ Cocaine epidemic

PTSD studies with male veterans

with/out substance use

Fullilove’s snowball sample

Page 6: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Historical Context for the Study of Trauma & Addiction

1990 1995 2000 2006

Herman’s Trauma

and Recovery published

Violence declared

public health epidemic

Chilcoat and Breslau self-medication

model

Kendler et al. co-twin study suggesting causal link

between abuse and SUD

National awareness of

PTSD and addiction following 9/11/01

SAMSHAfindings

published

Manualized integrated

trauma and SUD tx

RCTs of integrated PTSD and

SUD tx

Page 7: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Differences between Co-morbid PTSD vs. PTSD-only behavioral treatmentsAddition of components focused on coping and cognitive restructuring related to substance use (cravings and relapse triggers)

Concurrent Model : Additional components may be

integrated and delivered concurrently

Sequential Model: Initial phase may focus on

substance abuse related symptoms in preparation for

working on trauma related symptoms later

Page 8: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

PTSD/SUD Behavioral Treatments

ATRIUM: Addictions and Trauma Recovery Integrated Model (Miller & Guidry, 2001)

Seeking Safety (Najavits, 1998; www.seekingsafety.org)

TARGET - Trauma Affect Regulation: Guidelines for Education and Therapy (Ford; www.ptsdfreedom.org)

Transcend (Donovan et al., 2001)

CTPCD - Concurrent Treatment of PTSD and Cocaine Dependence (Back et al., 2001) SDPT: Substance Dependence PTSD Therapy (Triffleman et. al, 1999)

Page 9: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Washington Node Residence XII

New York Node ARTC Long Island Node

Lead Node

New England Node LMG Programs

South Carolina Node Charleston Center

Florida Node The Village

Florida Node Gateway Community

Ohio Valley Node Maryhaven

NIDA Clinical Trials Network Women & Trauma Sites

Page 10: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

CTN Long Island Node Team

Denise Hien, Lead InvestigatorEdward Nunes, Node PIGloria Miele, Training DirectorLisa Cohen, Protocol ManagerAimee Campbell, Project DirectorJennifer Lima, Node CoordinatorEva Petkova, Lead StatisticianHuiping Jiang, Statistician David Liu, NIDA Liaison

Page 11: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Participating Nodes and CTPs

Node Node PI(s) Protocol PI CTP Site PI Location

Florida

Jose Szapocznik & Daniel Santisteban

Lourdes Suarez-Morales

The Village Michael Miller Miami, FL

Gateway Community

Candace Hodgkins

Jacksonville, FL

New England

Kathleen Carroll

Melissa Gordon

LMG Programs Samuel Ball Stamford, CT

New York John RotrosenMarion Schwartz

Addiction Research & Treatment Corporation

Robert Sage Brooklyn, NY

Ohio Valley Gene SomozaGreg Brigham

Maryhaven Greg BrighamColumbus, OH

South Carolina

Kathleen BradyTherese Killeen

Charleston Center Mark CowellCharleston, SC

WashingtonDennis Donovan & Betsy Wells

Betsy Wells Residence XII Karen Canida Kirkland, WA

Page 12: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

CTN Women & Trauma: A Unique Opportunity

Chance to conduct a “practical” clinical trial on SS while maintaining a rigorous controlShorter treatment window and doseOpen-group, rolling admissions format paralleling real worldCommunity treatment providers as research cliniciansTreatment as usual while receiving research intervention

Page 13: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Study Aims

To assess the effectiveness of adding Seeking Safety (SS) and Women’s Health Education (WHE) groups to ongoing substance abuse treatment.

To evaluate the transportability of a 12- session group version of SS in community drug/alcohol treatment settings.

Page 14: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Pre-Post Control Group Design

Pre-Treatment

1 - 4 Weeks

Treatment

6 Weeks

Post Treatment Follow-up

46 Weeks

1 Week 3 Month 6 Month 12 Month

Pre-screening, Screening, Baseline, Randomization, Individual Counselor Session

12 Twice Weekly Group Sessions

Page 15: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Treatment Groups

Seeking Safety (SS)Short term, manualized treatmentCognitive BehavioralFocused on addiction and trauma

Women’s Health Education (WHE)Short term, manualized treatmentPsychoeducationalFocused on women’s health information and issues

Page 16: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Seeking Safety

Developed as a group treatment for PTSD/SUD womenBased on CBT models of SUDs, PTSD treatment, women’s treatment and educational researchEducates patients about PTSD and SUD’s and their interactionGoals include abstinence and decreased PTSD symptomsFocuses on enhancing coping skills, safety and self-careActive, structured treatment - therapist teaches, supports and encouragesCase management

Najavits, 2002; www.seekingsafety.org

Page 17: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Women’s Health Education

EmpowermentInformation is empowering

Self-careSubstance abuse and trauma interfere with ability to care for oneself

Exposure to traumatic stress can affect people on many different levels of functioning including:

emotionalbehavioral physical

There is significant overlap of PTSD and physical symptoms

In the national comorbidity survey, use of medical care services was highest in PTSD and panic disorder patients (Kessler, 1995)

Page 18: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Assessment DomainsDemographics

Substance Abuse/Dependence DiagnosisCIDI – Composite International Diagnostic Interview

Substance UseSUI – Substance Use Inventory (Primary)

Biological – Urine/Saliva Screen (Primary)

ASI – Addiction Severity Index

HIV Risk Behaviors: RBS – Risk Behavior Survey

Health and Family Network (ASI; add-on questions)

Page 19: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Assessment Domains

PTSD Diagnosis and SymptomsCAPS – Clinician Administered PTSD Scale (Primary)

PSS-SR – Post Traumatic Stress Symptoms – Self Report

Trauma Exposure: Lifetime Events Checklist

Psychiatric Symptoms: BSI – Brief Symptom Inventory

Service Utilization: TSR – Treatment Services Review (medication)

Page 20: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

In-Treatment Measures(baseline, weekly through treatment,1week post)

PTSD Symptoms (PSS-SR)

Biologically Confirmed Substance Abstinence and Proportion of Days Used

Substance Use Inventory (SUI)

Urine Drug Screen (UDS)

Saliva Alcohol Screen (ST)

Page 21: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Participant Eligibility Criteria

Inclusionfemale, 18 - 65 years oldused an illicit substance within the past six months and have a current diagnosis of illicit drug/alcohol abuse or dependencePTSD or Sub-threshold PTSDenrolled at participating community treatment program

Exclusion advanced stage medical disease (AIDS, TB)impaired mental status (MMSE: less than or equal to 21)significant risk of suicidal/homicidal intent or behaviorhistory of schizophrenia-spectrum diagnosisactive psychosis (prior 2 months)involved in PTSD-related litigationrefuses to be audio or videotaped

Page 22: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Enrollment

Initial ScreenN=1,963

Eligible for BaselineN=1,212 (62%)

IneligibleN=751

Completed BaselineN=541 (45%)

No Full ScreenN=751

Eligible for RandomizationN=379 (70%)

IneligibleN=162

RandomizedN=353 (93%)

Not Randomized (multiple reasons)

N=26

Page 23: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Sample Characteristics (N=353)

Variable percent or M (S.D.)

Age (years) 39.2 (9.3) Race/ethnicity

Hispanic or Latino 6.5 Black/African American 34.0

White 45.6 Mixed 13.3 Other 0.6

Marital status Married 33.3

Widowed/Divorced 29.3 Never Married 37.4

Page 24: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

PTSD Diagnosis and Severity at Baseline (N=353)

PTSD Diagnoses and Severity Scores percent or M (S.D.)

Current Full PTSD 80.4 Current Subthreshold PTSD 19.6 CAPS Total Score 62.8 (19.4) PSS-SR Severity 45.6 (10.8) PSS-SR Frequency 38.7 (15.3)

Page 25: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Substance Use Disorders at Baseline (N=353)

Substance Use Diagnosis percent

Current Alcohol Use Disorder Diagnosis 62.0

Current Marijuana Use Disorder Diagnosis 35.4

Current Opioid Use Disorder Diagnosis 33.1

Current Cocaine Use Disorder Diagnosis 72.8

Current Stimulant Use Disorder Diagnosis 8.2

Note: not exclusive categories

Page 26: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Lifetime Trauma Exposure (N=353)

Lifetime Traumatic Experiences percent Physical Assault

Childhood Physical Abuse 58.7 Lifetime Physical Abuse 93.8

Sexual Assault Childhood Sexual Abuse 70.1 Lifetime Sexual Violence 89.5

Captivity 40.3 Sudden, Violent Death 19.3 Life-threatening Illness 39.8 Transportation Accident 72.7 Natural Disaster 53.1

Page 27: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Data Analytic Approach for In-Treatment Outcomes

Mixed effect models were used to model the outcome measures of interest as a function of baseline levels, time, treatment, site and their interactions.

A non-randomized sample of naturalistically-occurring “wait list” controls was examined with baseline as the pre-test and assessment during 1st week of treatment as the post-test.

Additional analyses on the impact of treatment attendance on outcomes were conducted.

Page 28: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

PTSD In-Treatment Outcomes: PSS-SR severity modeled from pre-treatment to post-treatment weekly by treatment group

Page 29: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

PTSD In-Treatment Outcomes: PSS-SR frequency modeled from pre-treatment to post-treatment weekly by treatment group

Page 30: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

SUD In-Treatment Outcomes: Abstinence rates modeled from pre-treatment to post-treatment weekly by treatment group

Page 31: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

SUD In-Treatment Outcomes: Days of use modeled from pre-treatment to post-treatment weekly by treatment group

Page 32: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Secondary Analyses: Six Week Pre- “Post” Changes for Non-Randomized Naturalistic Wait Group (N=20)

Wait List

Page 33: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Secondary Analyses: Treatment Attendance Rates

Treatment Group*

N Mean (sd) Median

SS 170 6.3 (4.4) 7

WHE 172 5.9 (4.3) 6.5

*No significant differences between groups

Page 34: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Secondary Analyses: Effects of treatment attendance on post-treatment abstinence rates

Source DF 2 p-value

Baseline Abstinence 1 48.07 <.001

Race 3 2.39 n.s.

Site 5 48.95 <.001

Age 1 0.27 n.s.

Education 1 0.00 n.s.

Time 1 4.33 <.05

Treatment 1 0.04 n.s.

Treatment Attendance 1 7.47 <.001

Page 35: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Secondary Analyses: Effects of treatment attendance on post-treatment days of use

Source DF 2 p-value

Baseline Use 1 24.09 <.001

Race 3 1.48 n.s.

Site 5 14.20 0.01

Age 1 0.85 n.s.

Education 1 1.28 n.s.

Time 6 11.78 n.s.

Treatment 1 0.05 n.s.

Baseline Use*Time 6 24.89 <.001

Treatment Attendance 1 7.07 <.01

Page 36: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

CommentsThough all participants met PTSD and SUD diagnoses as per study inclusion criteria, findings show that within this sample population there was substantial variability across sites in terms of types of trauma exposure, types of drugs used and specific drug use diagnoses.

Despite such differences in site characteristics, overall, both SS and WHE groups led by community substance abuse counselors can reduce PTSD symptoms at a statistically significant level.

Although SUD outcomes were not statistically significant by the end of six weeks of treatment, they were reduced from baseline and the number of sessions received did significantly predict lowered levels of SUD symptoms.

We speculate that the reductions observed in PTSD symptoms during treatment, particularly in the SS group, may be more pronounced over the follow up period and lead to greater reductions in SUD symptoms over time.

Page 37: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University
Page 38: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Project Directors/Protocol PIs

Frankie Kropp

Agatha Kulaga

Melissa Gordon

Chanda Brown

Silvia Mestre

Nadja Schreiber

Mary Hatch-Maillette

Chris Neuenfeldt

Cheri Hansen

Karen Esposito

Sharon Chambers

Page 39: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

CTN-0015 Research StaffBrianne O’SullivanIleana GrafMelissa ChuNishi KanukolluTreneane SalisburyRebecca KrebsAnn WhetzelStella ReskoCarol HutchinsonChanda BrownJanice AyudaPamela BernardJessica UchaNicole Moodie

Allison Kristman-ValenteLynette WrightMelanie SpearLisa JohnsonCatherine WilliamsCalonie GrayMichele DiBonoRachel HayonBarbara BettiniBarbara ThomasLisa MarkiewiczElizabeth CowperRosaline KingLara Reichert

Page 40: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

CTN-0015 CliniciansLisa CohenDawn Baird-TaylorLisa LittMartha SchmitzKaren TozziDarlene FranklinKathleen EstlundMolly McHenry-WhalenErin DemirjianAnslie StarkKaren BowesMetris BattsFelisha LyonsKathy McPhersonVictoria JohnsonDenese LewisSharon Anderson-GossMerilee PerrineAngela Waldrop

Leslie Lobel-JubaMaria Mercedes GiolLourdes BarriosLisa MandelmanJeanette SuarezDanielle MacriMaria HurtadoTina KlemNancy MagnettiAnne Marie SalesRenee SumpterMichelle MelendezIda LandersRegina MorrisonClare TysonMary Hodge-MoenSandra FreeGoldie GallowayKaren CanidaKatie Revenaugh

Page 41: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

CTN-0015 QA and Data Management

Jim RobinsonJP NoonanConnie KleinKaren LonctoChris HutzLauren FineMichelle CordnerMelissa GordonMaura WeberKristie SmithCatherine DillonDonna BargoilJurine LewisGirish Gurnani

Inna LogvinskyPeggy SomozaSharon PickrelKatie WeaverMolly CarneyCatherine OttoRebecca DefeversEmily DeGarmoRoyce SampsonStephanie GentilinClare TysonAnthony FloydNathilee Francois

Page 42: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Appendices: Summary Data Tables

Page 43: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Comparison of Existing Trauma / SUD- Focused Treatment Research

Najavits, 1998

Triffleman, 2000

Brady et. al., 2001

Donovan, 2001

Hien et al.,

2004

N 27 Women

19 Mixed

39 Mixed

46 Men

107Women

Design No Control RCT No Control No Control RCT

Sessions, Timeframe & Modality

24, 3 mos., group

40, 5 mos.,

individual

164 mos.,

individual

603 mos., group

243 mos.,

individual

Tx Content SS SDPT, 12-Step

CTPSD, CBT, Exposure

CBT, RPT, Soc Support

SS, RPT, TAU

Follow Up 3 mos. 1 mo. 6 mos. 6/12 mos. 6/9 mos.

Results SU, PTSD & Depression SXs

SU, PTSD, Psych SXs

SU, PTSD & Depression SXs

SU, PTSD SXs

SU, PTSD, Psych SXs at 6 mos

Page 44: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Summary Statistics for Post-treatment PSS-SR Severity Modeled by Baseline PTSD Severity, Demographics, Treatment Group, Time, Site, and their Interactions

Parameter DF 2 p-value

PSS-SR Baseline 1 71.73 <.001

Race 3 1.34 n.s.

Site 5 24.19 <.001

Age 1 0.68 n.s.

Education 1 4.97 <.05

Time 1 1.08 n.s.

Treatment 1 6.81 <.01

Time*Treatment 1 4.96 <.05

Time* PSS-SR Baseline 1 12.35 <.001

Page 45: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Summary Statistics for Post-treatment PSS-SR Frequency Modeled by Baseline PTSD Frequency, Demographics, Treatment Group, Time, Site, and their Interactions

Parameter DF 2 p-value

PSS-SR Baseline 1 76.74 <.001

Race 3 0.64 n.s.

Site 5 27.60 <.001

Age 1 0.95 n.s.

Education 1 5.07 <.05

Time 1 1.47 n.s.

Treatment 1 8.55 <.01

Time*Treatment 1 5.28 <.05

Time* PSS-SR Baseline1 15.32 <.001

Page 46: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Summary Statistics for Post-treatment Days of Use Modeled by Baseline Days of Use, Demographics, Treatment Group, Time, Site, and their Interactions

Parameter DF 2 p-value

Baseline Days of Use 1 21.66 <.001

Race 3 1.26 n.s.

Site 5 18.37 <.01

Age 1 0.50 n.s.

Education 1 0.95 n.s.

Time 6 11.90 <.10

Treatment 1 0.01 n.s.

Baseline Days of Use*Time 6 20.80 <.01

Page 47: CTN 0015: Preliminary findings from the “Women and Trauma” Study Denise Hien, Ph.D. Research Scientist, Social Intervention Group, Columbia University

Summary Statistics for Post-treatment Abstinence Rates Modeled by Baseline Abstinence, Demographics, Treatment Group, Time, Site, and their Interactions

Parameter DF 2 p-value

Baseline Abstinence 1 51.12 <.001

Race 3 2.10 n.s.

Site 5 44.18 <.001

Age 1 0.18 n.s.

Education 1 0.00 n.s.

Time 1 0.02 n.s.

Treatment1 0.12 n.s.