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Dive into the research topics where Greg Clarke is active.

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Featured researches published by Greg Clarke.


JAMA | 2008

Switching to Another SSRI or to Venlafaxine With or Without Cognitive Behavioral Therapy for Adolescents With SSRI-Resistant Depression: The TORDIA Randomized Controlled Trial

David A. Brent; Graham J. Emslie; Greg Clarke; Karen Dineen Wagner; Joan Rosenbaum Asarnow; Marty Keller; Benedetto Vitiello; Louise Ritz; Satish Iyengar; Kaleab Z. Abebe; Boris Birmaher; Neal D. Ryan; Betsy D. Kennard; Carroll W. Hughes; Lynn DeBar; James T. McCracken; Michael Strober; Robert Suddath; Anthony Spirito; Henrietta L. Leonard; Nadine M. Melhem; Giovanna Porta; Matthew Onorato; Jamie Zelazny

CONTEXT Only about 60% of adolescents with depression will show an adequate clinical response to an initial treatment trial with a selective serotonin reuptake inhibitor (SSRI). There are no data to guide clinicians on subsequent treatment strategy. OBJECTIVE To evaluate the relative efficacy of 4 treatment strategies in adolescents who continued to have depression despite adequate initial treatment with an SSRI. DESIGN, SETTING, AND PARTICIPANTS Randomized controlled trial of a clinical sample of 334 patients aged 12 to 18 years with a primary diagnosis of major depressive disorder that had not responded to a 2-month initial treatment with an SSRI, conducted at 6 US academic and community clinics from 2000-2006. INTERVENTIONS Twelve weeks of: (1) switch to a second, different SSRI (paroxetine, citalopram, or fluoxetine, 20-40 mg); (2) switch to a different SSRI plus cognitive behavioral therapy; (3) switch to venlafaxine (150-225 mg); or (4) switch to venlafaxine plus cognitive behavioral therapy. MAIN OUTCOME MEASURES Clinical Global Impressions-Improvement score of 2 or less (much or very much improved) and a decrease of at least 50% in the Childrens Depression Rating Scale-Revised (CDRS-R); and change in CDRS-R over time. RESULTS Cognitive behavioral therapy plus a switch to either medication regimen showed a higher response rate (54.8%; 95% confidence interval [CI], 47%-62%) than a medication switch alone (40.5%; 95% CI, 33%-48%; P = .009), but there was no difference in response rate between venlafaxine and a second SSRI (48.2%; 95% CI, 41%-56% vs 47.0%; 95% CI, 40%-55%; P = .83). There were no differential treatment effects on change in the CDRS-R, self-rated depressive symptoms, suicidal ideation, or on the rate of harm-related or any other adverse events. There was a greater increase in diastolic blood pressure and pulse and more frequent occurrence of skin problems during venlafaxine than SSRI treatment. CONCLUSIONS For adolescents with depression not responding to an adequate initial treatment with an SSRI, the combination of cognitive behavioral therapy and a switch to another antidepressant resulted in a higher rate of clinical response than did a medication switch alone. However, a switch to another SSRI was just as efficacious as a switch to venlafaxine and resulted in fewer adverse effects. TRIAL REGISTRATION clinicaltrials.gov Identifier: NCT00018902.


Journal of the American Academy of Child and Adolescent Psychiatry | 2011

Suicide attempts and nonsuicidal self-injury in the treatment of resistant depression in adolescents: Findings from the TORDIA study

Joan Rosenbaum Asarnow; Giovanna Porta; Anthony Spirito; Graham J. Emslie; Greg Clarke; Karen Dineen Wagner; Benedetto Vitiello; Martin B. Keller; Boris Birmaher; James T. McCracken; Taryn L. Mayes; Michelle Berk; David A. Brent

OBJECTIVE To evaluate the clinical and prognostic significance of suicide attempts (SAs) and nonsuicidal self-injury (NSSI) in adolescents with treatment-resistant depression. METHOD Depressed adolescents who did not improve with an adequate SSRI trial (N = 334) were randomized to a medication switch (SSRI or venlafaxine), with or without cognitive-behavioral therapy. NSSI and SAs were assessed at baseline and throughout the 24-week treatment period. RESULTS Of the youths, 47.4% reported a history of self-injurious behavior at baseline: 23.9% NSSI alone, 14% NSSI+SAs, and 9.5% SAs alone. The 24-week incidence rates of SAs and NSSI were 7% and 11%, respectively; these rates were highest among youths with NSSI+SAs at baseline. NSSI history predicted both incident SAs (hazard ratio [HR]= 5.28, 95% confidence interval [CI] = 1.80-15.47, z = 3.04, p = .002) and incident NSSI (HR = 7.31, z = 4.19, 95% CI = 2.88-18.54, p < .001) through week 24, and was a stronger predictor of future attempts than a history of SAs (HR = 1.92, 95% CI = 0.81-4.52, z = 2.29, p = .13). In the most parsimonious model predicting time to incident SAs, baseline NSSI history and hopelessness were significant predictors, adjusting for treatment effects. Parallel analyses predicting time to incident NSSI through week 24 identified baseline NSSI history and physical and/or sexual abuse history as significant predictors. CONCLUSIONS NSSI is a common problem among youths with treatment-resistant depression and is a significant predictor of future SAs and NSSI, underscoring the critical need for strategies that target the prevention of both NSSI and suicidal behavior. CLINICAL TRIAL REGISTRATION INFORMATION Treatment of SSRI-Resistant Depression in Adolescents (TORDIA). URL: http://www.clinicaltrials.gov. Unique Identifier: NCT00018902.


Journal of the American Academy of Child and Adolescent Psychiatry | 1989

A three-year follow-up of Cambodian young people traumatized as children.

J. David Kinzie; William Sack; Richard H. Angell; Greg Clarke; Rath Ben

Twenty-seven Cambodian young people, who were severely traumatized at ages 8 to 12, were followed up 3 years after an original study. A structured interview and self-rating scales showed that post-traumatic stress disorders (PTSD) were still highly prevalent (48%). Depression existed in 41%. Those with PTSD differed significantly from those without PTSD on the Global Adjustment Scale, the Social Adjustment Scale, the Beck Depression Inventory, and the Impact of Event Scale. Eight subjects had PTSD at both interviews, while 11 had none at either time. Eight showed a variable course. Avoidance behavior was highly prevalent, even among those without PTSD diagnosis. Although functioning relatively well, these youths continued to show symptoms related to their trauma of 8 to 12 years before.


Journal of the American Academy of Child and Adolescent Psychiatry | 1993

A 6-Year Follow-up Study of Cambodian Refugee Adolescents Traumatized as Children

William Sack; Greg Clarke; Chanrithy Him; Dan Dickason; Brian Goff; Kathleen Lanham; J. David Kinzie

Seventy-three percent of a sample of 46 Cambodian youth interviewed in 1984 and 1987 were reinterviewed in 1990 as part of a pretest for a multisite study of Cambodian refugee trauma now under way. An additional sample of convenience of 38 youth were also interviewed to determine reliability and validity of the diagnostic instruments chosen for the larger study. The DSM-III-R diagnosis of post-traumatic stress disorder (PTSD) was found to persist, but the symptoms appeared less intense over time. In contrast, the prevalence of depression dropped markedly since 1987. Subjects remained largely free of comorbid conditions. Diagnostic reliability and validity were satisfactory. The follow-up sample appeared to be functioning well despite their PTSD profiles. The findings are discussed in light of several current controversies surrounding the concept and measurement of PTSD.


American Journal of Psychiatry | 2009

Predictors of Spontaneous and Systematically Assessed Suicidal Adverse Events in the Treatment of SSRI-Resistant Depression in Adolescents (TORDIA) Study

David A. Brent; Graham J. Emslie; Greg Clarke; Joan Rosenbaum Asarnow; Anthony Spirito; Louise Ritz; Benedetto Vitiello; Satish Iyengar; Boris Birmaher; Neal D. Ryan; Jamie Zelazny; Matthew Onorato; Betsy Kennard; Taryn L. Mayes; Lynn DeBar; James T. McCracken; Michael Strober; Robert Suddath; Henrietta L. Leonard; Giovanna Porta; Martin B. Keller

OBJECTIVE The authors sought to identify predictors of self-harm adverse events in treatment-resistant, depressed adolescents during the first 12 weeks of treatment. METHOD Depressed adolescents (N=334) who had not responded to a previous trial with an SSRI antidepressant were randomized to a switch to either another SSRI or venlafaxine, with or without cognitive behavior therapy. Self-harm events, i.e., suicidal and non-suicidal self-injury adverse events were assessed by spontaneous report for the first 181 participants, and by systematic weekly assessment for the last 153 participants. RESULTS Higher rates of suicidal (20.8% vs. 8.8%) and nonsuicidal self-injury (17.6% vs. 2.2%), but not serious adverse events (8.4% vs. 7.3%) were detected with systematic monitoring. Median time to a suicidal event was 3 weeks, predicted by high baseline suicidal ideation, family conflict, and drug and alcohol use. Median time to nonsuicidal self-injury was 2 weeks, predicted by previous history of nonsuicidal self-injury. While there were no main effects of treatment, venlafaxine treatment was associated with a higher rate of self-harm adverse events in those with higher suicidal ideation. Adjunctive use of benzodiazepines, while in a small number of participants (N=10) was associated with higher rate of both suicidal and nonsuicidal self-injury adverse events. CONCLUSIONS Since predictors of suicidal adverse events also predict poor response to treatment, and many of these events occurred early in treatment, improving the speed of response to depression, by targeting of family conflict, suicidal ideation, and drug use may help to reduce their incidence. The relationship of venlafaxine and of benzodiazepines to self-harm events requires further study and clinical caution.


Journal of the American Academy of Child and Adolescent Psychiatry | 2009

Treatment of Selective Serotonin Reuptake Inhibitor-Resistant Depression in Adolescents: Predictors and Moderators of Treatment Response.

Joan Rosenbaum Asarnow; Graham J. Emslie; Greg Clarke; Karen Dineen Wagner; Anthony Spirito; Benedetto Vitiello; Satish Iyengar; Wael Shamseddeen; Louise Ritz; Boris Birmaher; Neal D. Ryan; Betsy D. Kennard; Taryn L. Mayes; Lynn DeBar; James T. McCracken; Michael Strober; Robert Suddath; Henrietta L. Leonard; Giovanna Porta; Martin B. Keller; David A. Brent

OBJECTIVE To advance knowledge regarding strategies for treating selective serotonin reuptake inhibitor (SSRI)-resistant depression in adolescents, we conducted a randomized controlled trial evaluating alternative treatment strategies. In primary analyses, cognitive-behavioral therapy (CBT) combined with medication change was associated with higher rates of positive response to short-term (12-week) treatment than medication alone. This study examines predictors and moderators of treatment response, with the goal of informing efforts to match youths to optimal treatment strategies. METHOD Youths who had not improved during an adequate SSRI trial (N = 334) were randomized to an alternative SSRI, an alternative SSRI plus CBT, venlafaxine, or venlafaxine plus CBT. Analyses examined predictors and moderators of treatment response. RESULTS Less severe depression, less family conflict, and absence of nonsuicidal self-injurious behavior predicted better treatment response status. Significant moderators of response to CBT + medication (combined) treatment were number of comorbid disorders and abuse history; hopelessness was marginally significant. The CBT/combined treatment superiority over medication alone was more evident among youths who had more comorbid disorders (particularly attention-deficit/hyperactivity disorder and anxiety disorders), no abuse history, and lower hopelessness. Further analyses revealed a stronger effect of combined CBT + medication treatment among youths who were older and white and had no nonsuicidal self-injurious behavior and longer prestudy pharmacotherapy. CONCLUSIONS Combined treatment with CBT and antidepressant medication may be more advantageous for adolescents whose depression is comorbid with other disorders. Given the additional costs of adding CBT to medication, consideration of moderators in clinical decision making can contribute to a more personalized and effective approach to treatment.


Journal of the American Academy of Child and Adolescent Psychiatry | 2003

Treatment for Adolescents with Depression Study (TADS): Rationale, design, and methods

John S. March; Susan G. Silva; Stephen Petrycki; John F. Curry; Karen C. Wells; John A. Fairbank; Barbara J. Burns; Marisa Elena Domino; Benedetto Vitiello; Joanne B. Severe; Charles D. Casat; Jeanette Kolker; Norah C. Feeny; Robert L. Findling; Sheridan Stull; Susan Baab; Bruce Waslick; Michael Sweeney; Lisa M. Kentgen; Rachel Kandel; John T. Walkup; Golda S. Ginsburg; Elizabeth Kastelik; Hyung Koo; Christopher J. Kratochvil; Diane May; Randy LaGrone; Martin Harrington; Anne Marie Albano; Glenn S. Hirsch

OBJECTIVES A rapidly growing empirical literature on the treatment of major depressive disorder (MDD) in youth supports the efficacy of short-term treatment with depression-specific cognitive-behavioral therapy or medication management with a selective serotonin reuptake inhibitor. These studies also identify a substantial probability of partial response and of relapse, which might be addressed by more intensive, longer-term treatments. METHOD Funded by the National Institute of Mental Health, the Treatment for Adolescents With Depression Study (TADS) is a multicenter, randomized, masked effectiveness trial designed to evaluate the short-term (12-week) and long-term (36-week) effectiveness of four treatments for adolescents with MDD: fluoxetine, cognitive-behavioral therapy, their combination, and, acutely, pill placebo. A volunteer sample of 432 subjects aged 12-17 years (inclusive) with a primary DSM-IV diagnosis of MDD who are broadly representative of patients seen in clinical practice will enter the study. The primary dependent measures rated blindly by an independent evaluator are the Childrens Depression Rating Scale and, for responder analysis, a dichotomized Clinical Global Impressions-Improvement score. Consistent with an intent-to-treat analysis, all patients, regardless of treatment status, return for all scheduled assessments. RESULTS This report describes the design of the trial, the rationale for the design choices made, and the methods used to carry out the trial. CONCLUSION When completed, TADS will improve our understanding of how best to initiate treatment for adolescents with MDD.


Prevention Science | 2001

Mediating mechanisms in a program to reduce intentions to use anabolic steroids and improve exercise self-efficacy and dietary behavior.

David P. MacKinnon; Linn Goldberg; Greg Clarke; Diane L. Elliot; Jeewon Cheong; Angela Lapin; Esther L. Moe; Jennifer L. Krull

This study investigated the mediating mechanisms responsible for the effects of a program designed to reduce intentions to use anabolic steroids, improve nutrition, and increase strength training self-efficacy. Fifteen of 31 high school football teams (N = 1,506 players at baseline) in Oregon and Washington were assigned to receive the intervention. The multicomponent program addressed the social influences promoting ergogenic drug use and engaging students in healthy nutrition and strength training alternative behaviors. Although the results differed across the three dependent variables, the program appeared to work by changing team norms. Unlike prevention of other drugs, changes in knowledge and perceived severity were mediators of program effects in this study.


American Journal of Psychiatry | 2010

Treatment of Resistant Depression in Adolescents (TORDIA): Week 24 Outcomes

Graham J. Emslie; Taryn L. Mayes; Giovanna Porta; Benedetto Vitiello; Greg Clarke; Karen Dineen Wagner; Joan Rosenbaum Asarnow; Anthony Spirito; Boris Birmaher; Neal D. Ryan; Betsy D. Kennard; Lynn DeBar; James T. McCracken; Michael Strober; Matthew Onorato; Jamie Zelazny; Marty Keller; Satish Iyengar; David A. Brent

OBJECTIVE The purpose of this study was to report on the outcome of participants in the Treatment of Resistant Depression in Adolescents (TORDIA) trial after 24 weeks of treatment, including remission and relapse rates and predictors of treatment outcome. METHOD Adolescents (ages 12-18 years) with selective serotonin reuptake inhibitor (SSRI)-resistant depression were randomly assigned to either a medication switch alone (alternate SSRI or venlafaxine) or a medication switch plus cognitive-behavioral therapy (CBT). At week 12, responders could continue in their assigned treatment arm and nonresponders received open treatment (medication and/or CBT) for 12 more weeks (24 weeks total). The primary outcomes were remission and relapse, defined by the Adolescent Longitudinal Interval Follow-Up Evaluation as rated by an independent evaluator. RESULTS Of 334 adolescents enrolled in the study, 38.9% achieved remission by 24 weeks, and initial treatment assignment did not affect rates of remission. Likelihood of remission was much higher (61.6% versus 18.3%) and time to remission was much faster among those who had already demonstrated clinical response by week 12. Remission was also higher among those with lower baseline depression, hopelessness, and self-reported anxiety. At week 12, lower depression, hopelessness, anxiety, suicidal ideation, family conflict, and absence of comorbid dysthymia, anxiety, and drug/alcohol use and impairment also predicted remission. Of those who responded by week 12, 19.6% had a relapse of depression by week 24. CONCLUSIONS Continued treatment for depression among treatment-resistant adolescents results in remission in approximately one-third of patients, similar to adults. Eventual remission is evident within the first 6 weeks in many, suggesting that earlier intervention among nonresponders could be important.


JAMA | 2014

Collaborative Care for Adolescents With Depression in Primary Care A Randomized Clinical Trial

Laura P. Richardson; Evette Ludman; Elizabeth McCauley; Jeff Lindenbaum; Cindy Larison; Chuan Zhou; Greg Clarke; David A. Brent; Wayne Katon

IMPORTANCE Up to 20% of adolescents experience an episode of major depression by age 18 years yet few receive evidence-based treatments for their depression. OBJECTIVE To determine whether a collaborative care intervention for adolescents with depression improves depressive outcomes compared with usual care. DESIGN Randomized trial with blinded outcome assessment conducted between April 2010 and April 2013. SETTING Nine primary care clinics in the Group Health system in Washington State. PARTICIPANTS Adolescents (aged 13-17 years) who screened positive for depression (Patient Health Questionnaire 9-item [PHQ-9] score ≥10) on 2 occasions or who screened positive and met criteria for major depression, spoke English, and had telephone access were recruited. Exclusions included alcohol/drug misuse, suicidal plan or recent attempt, bipolar disorder, developmental delay, and seeing a psychiatrist. INTERVENTIONS Twelve-month collaborative care intervention including an initial in-person engagement session and regular follow-up by masters-level clinicians. Usual care control youth received depression screening results and could access mental health services through Group Health. MAIN OUTCOMES AND MEASURES The primary outcome was change in depressive symptoms on a modified version of the Child Depression Rating Scale-Revised (CDRS-R; score range, 14-94) from baseline to 12 months. Secondary outcomes included change in Columbia Impairment Scale score (CIS), depression response (≥50% decrease on the CDRS-R), and remission (PHQ-9 score <5). RESULTS Intervention youth (n = 50), compared with those randomized to receive usual care (n = 51), had greater decreases in CDRS-R scores such that by 12 months intervention youth had a mean score of 27.5 (95% CI, 23.8-31.1) compared with 34.6 (95% CI, 30.6-38.6) in control youth (overall intervention effect: F2,747.3 = 7.24, P < .001). Both intervention and control youth experienced improvement on the CIS with no significant differences between groups. At 12 months, intervention youth were more likely than control youth to achieve depression response (67.6% vs 38.6%, OR = 3.3, 95% CI, 1.4-8.2; P = .009) and remission (50.4% vs 20.7%, OR = 3.9, 95% CI, 1.5-10.6; P = .007). CONCLUSIONS AND RELEVANCE Among adolescents with depression seen in primary care, a collaborative care intervention resulted in greater improvement in depressive symptoms at 12 months than usual care. These findings suggest that mental health services for adolescents with depression can be integrated into primary care. TRIAL REGISTRATION clinicaltrials.gov Identifier: NCT01140464.

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David A. Brent

University of Pittsburgh

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Graham J. Emslie

University of Texas Southwestern Medical Center

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Boris Birmaher

University of Pittsburgh

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Benedetto Vitiello

National Institutes of Health

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Giovanna Porta

University of Pittsburgh

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Karen Dineen Wagner

University of Texas Medical Branch

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Taryn L. Mayes

University of Texas Southwestern Medical Center

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