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Dive into the research topics where Christopher K. Varley is active.

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Featured researches published by Christopher K. Varley.


Comprehensive Psychiatry | 1997

Adult attention-deficit hyperactivity disorder: Assessment guidelines based on clinical presentation to a specialty clinic

Peter Roy-Byrne; Leonard Scheele; John R. Brinkley; Nicholas D. Ward; Connie Wiatrak; Joan Russo; Brenda D. Townes; Christopher K. Varley

Of 143 adults presenting for attention-deficit hyperactivity disorder (ADHD) evaluation, 46 (32%) clearly met diagnostic criteria, 46 (32%) clearly did not meet diagnostic criteria, and another 51 (36%) with current ADHD-like features did not meet criteria due to either a lack of childhood history and/or complicating severe psychiatric or substance abuse comorbidity. The three groups were similar in demographics, psychiatric diagnosis, psychiatric symptom severity, and functional impairment. Compared with the group not meeting ADHD criteria, patients with ADHD had more frequent histories of learning disability in childhood, poorer reading scores on the Wide-Range Achievement Test (WRAT), poorer scores on the Continuous Performance Test (CPT), and higher scores on the Wender-Utah Rating Scale (WURS) for ADHD. Patients in the ambiguous ADHD category had higher rates of current substance abuse than the other two groups. While this group resembled the non-ADHD group in having a low incidence of learning disability and normal reading scores, their poor performance on the CPT and high scores on the WURS more closely resembled those of ADHD patients. These findings suggest that there are a few rating scales, testing instruments, and lifetime history characteristics that help to clarify the difficult diagnostic distinction between adult patients who do and do not have ADHD.


Journal of the American Academy of Child and Adolescent Psychiatry | 1997

Case Study: Two Additional Sudden Deaths With Tricyclic Antidepressants

Christopher K. Varley; Jon McClellan

Since 1990, there have been five reported cases of sudden death in children treated with desipramine. This case study describes the sudden deaths of two additional children treated with tricyclic antidepressants, one with desipramine, 3.3 mg/kg per day, the other with imipramine, 6 mg/kg per day and thioridazine, 1 mg/kg per day. The reports add to concerns about the use of tricyclics in children.


JAMA Pediatrics | 2014

Collaborative Care Intervention Targeting Violence Risk Behaviors, Substance Use, and Posttraumatic Stress and Depressive Symptoms in Injured Adolescents: A Randomized Clinical Trial

Douglas Zatzick; Joan Russo; Sarah Peregrine Lord; Christopher K. Varley; Jin Wang; Lucy Berliner; Gregory J. Jurkovich; Lauren K. Whiteside; Stephen S. O'Connor; Frederick P. Rivara

IMPORTANCE Violence and injury risk behaviors, alcohol and drug use problems, and posttraumatic stress disorder (PTSD) and depressive symptoms occur frequently among adolescents presenting to acute care medical settings after traumatic physical injury. OBJECTIVE To test the effectiveness of a stepped collaborative care intervention targeting this constellation of risk behaviors and symptoms in randomly sampled hospitalized adolescents with and without traumatic brain injury. DESIGN, SETTING, AND PARTICIPANTS A pragmatic randomized clinical trial was conducted at a single US level I trauma center. Participants included 120 adolescents aged 12 to 18 years randomized to intervention (n = 59) and control (n = 61) conditions. INTERVENTIONS Stepped collaborative care intervention included motivational interviewing elements targeting risk behaviors and substance use as well as medication and cognitive behavioral therapy elements targeting PTSD and depressive symptoms. MAIN OUTCOMES AND MEASURES Adolescents were assessed at baseline before randomization and 2, 5, and 12 months after injury hospitalization. Standardized instruments were used to assess violence risk behaviors, alcohol and drug use, and PTSD and depressive symptoms. RESULTS The investigation attained more than 95% adolescent follow-up at each assessment point. At baseline, approximately one-third of the participants endorsed the violence risk behavior of carrying a weapon. Regression analyses demonstrated that intervention patients experienced significant reductions in weapon carrying compared with controls during the year after injury (group × time effect, F3,344 = 3.0; P = .03). At 12 months after the injury, 4 (7.3%) intervention patients vs 13 (21.3%) control patients reported currently carrying a weapon (relative risk, 0.31; 95% CI, 0.11-0.90). The intervention was equally effective in reducing the risk of weapon carrying among injured adolescents with and without traumatic brain injury. Other treatment targets, including alcohol and drug use problems and high levels of PTSD and depressive symptoms, occurred less frequently in the cohort relative to weapon carrying and were not significantly affected by the intervention. CONCLUSIONS AND RELEVANCE Collaborative care intervention reduced the risk of adolescent weapon carrying during the year after the injury hospitalization. Future investigation should replicate this preliminary observation. If the finding is replicated, orchestrated investigative and policy efforts could systematically implement and evaluate screening and intervention procedures targeting youth violence prevention at US trauma centers. TRIAL REGISTRATION clinicaltrials.gov identifier: NCT00619255.


Pediatric Drugs | 2001

Sudden Death Related to Selected Tricyclic Antidepressants in Children

Christopher K. Varley

The association between tricyclic antidepressant (TCA) use in children and increased risk of sudden death is unclear, but still possible. There are suitable alternatives to TCAs for all of the indications in which they have shown efficacy.A prudent practice model for the utilisation of TCAs has been developed. This includes initial utilisation of alternative agents, with TCAs as secondary or tertiary choices; informed consent from patient and family, including mention of the possible relationship of TCA with sudden death; vigilance of the emerging literature; and finally, systematic monitoring of patients, including electrocardiograms, drug serum concentrations and vital signs.This protocol needs to be validated with regard to utility and the degree of assistance it provides in the management of children treated with TCAs.


Journal of the American Academy of Child and Adolescent Psychiatry | 1991

Pediatric Cardiovascular Effects of Imipramine and Desipramine

Mary G. Bartels; Christopher K. Varley; Jeff Mitchell; Stanley J. Stamm

Electrocardiograms were evaluated in 39 children and adolescents before and after the clinical use of imipramine and desipramine. The average increase in PR interval was 0.01 seconds. The PR interval increased by 0.02 seconds in 11 subjects, and a new first-degree atrioventricular block developed in two subjects. These changes were not related to the choice between imipramine and desipramine, the dose, or the method of administration. An increase in PR interval by 0.02 seconds or more did correlate with having an abnormality disclosed on a pretreatment electrocardiogram. The average increase in PR interval was 0.007 seconds for subjects with normal baseline electrocardiograms and 0.019 seconds for subjects with conduction and nonconduction abnormalities disclosed in baseline tracings. None of the electrocardiogram changes resulted in adverse clinical consequences.


Journal of The American Academy of Child Psychiatry | 1984

Diet and the behavior of children with attention deficit disorder.

Christopher K. Varley

A spectrum of dietary recommendations designed to ameliorate dysfunctional behavioral patterns in children with attention deficit disorder or hyperactivity, and the efficacy of the particular diets, is examined. Existing research on diet and childrens behavior is reviewed, and preferred methods of treatment, based on comprehensive medical examination and parental responses to recommendations, are discussed.


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

Diagnosis of Attention Deficit Disorder with Hyperactivity in Chinese Boys

Xue Rong Li; Lin Yan Su; Brenda D. Townes; Christopher K. Varley

Parental and teacher ratings of adjustment on the Achenbach Child Behavior Checklist and Teacher Rating Form were obtained on 39 subjects diagnosed as having attention deficit disorder with hyperactivity (ADDH), 31 subjects with ADDH plus learning disability (ADDH-LD), and 29 controls. Subjects were all males between the ages of 9 and 11 years and resided in Changsha, Peoples Republic of China. Significant group differences were found between the two clinical groups and the control group. Ratings by parents and teachers of the ADDH and ADDH-LD groups indicated more behavior problems and poorer social adjustment than controls. ADDH and ADDH-LD groups were not significantly different from one another except on ratings of school and learning problems.


Pediatric Clinics of North America | 2003

Anxiety disorders in the child and teen

Christopher K. Varley; Cindy J. Smith

Several disorders have been reviewed (Table 1). Based upon review of the literature, an algorithm has been developed, supporting the initial use of cognitive behavioral therapy, followed by a psychopharmacology algorithm if treatment is not successful. In this algorithm, severely anxious patients initially may require psychopharmacologic treatment to be able to participate in cognitive behavioral treatment. Nonspecific measures of parent education, general support, and illness education to parents and patients are overarching principles. In this algorithm, the SSRIs are perceived to be first-line interventions, with tricyclic antidepressants and venlafaxine as second-line agents. Buspirone is considered a second- or third-line agent, as are the benzodiazepines. Table 2 reviews psychopharmacologic agents shown to be useful in the management of anxiety disorders in youth. Although much research remains to be done, there is evidence of efficacy of several interventions for anxiety disorders in children and adolescents. There is a need for a holistic and comprehensive management plan. Particular attention must be given to specific psychopharmacologic and psychotherapy needs, family matters, abuse issues, freedom from substance abuse, the use of peer support groups, and the encouragement of healthier lifestyle choices such as exercise. A rising number of well-done, large, placebo-controlled studies are providing increased support for medication and psychotherapy to inform evidence-based treatment. There is a need for teamwork and effective communication among team members in addressing pediatric and adolescent anxiety disorders.


Pediatric Clinics of North America | 2012

Social Skills Training for Children with Autism

Amy J. Bohlander; Felice Orlich; Christopher K. Varley

This article summarizes the current literature on social skills training for children and adolescents with autism spectrum disorders. The article describes several different methods of social skills training, along with a summary of research findings on effectiveness. Interventions described include social skills groups, peer mentoring/training, social stories, and video modeling. The article also describes information about accessing social skills training services, and concludes with future directions and recommendations for pediatricians.


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

Second Opinions Improve ADHD Prescribing in a Medicaid-Insured Community Population

Jeffery N. Thompson; Christopher K. Varley; Jon McClellan; Robert J. Hilt; Terry Lee; Alan C. Kwan; Taik Lee; Eric W. Trupin

OBJECTIVE The appropriate use of psychotropic medications in youths is an important public health concern. In this article, we describe a review process developed to monitor the use of stimulants and atomoxetine for attention-deficit/hyperactivity syndrome (ADHD) in youths receiving fee-for-service Medicaid services. METHOD Washington State Medicaid developed threshold safety parameters for ADHD medications through a process involving the community. A second opinion was mandated when safety thresholds based on dose, combination therapies, or age was exceeded. Use and cost were compared 2 years before and after the program began. RESULTS From May 2006 to April 2008, 5.35% of ADHD prescriptions exceeded safety thresholds, resulting in 1,046 second-opinion reviews. Of those, 538 (51.4%) resulted in a prescription adjustment. Adjustments were made to primary care physician (52%), psychiatrist (50%), nurse practitioner (54%), and physician assistant-written (51%) prescriptions. When the preperiod and postperiod were compared, second opinions reduced ADHD medication at high doses (53%), in combinations (44%), and for patients 5 years of age and younger (23%). The review process resulted in a savings of

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Eric W. Trupin

University of Washington

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Ray C. Hsiao

University of Washington

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Jeff Mitchell

University of Washington

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Jon McClellan

University of Washington

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Cindy J. Smith

University of Washington

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Joan Russo

University of Washington

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Kelly Schloredt

Boston Children's Hospital

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