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Dive into the research topics where Trevor R. Hadley is active.

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Featured researches published by Trevor R. Hadley.


Housing Policy Debate | 2002

Public service reductions associated with placement of homeless persons with severe mental illness in supportive housing

Dennis P. Culhane; Stephen Metraux; Trevor R. Hadley

Abstract This article assesses the impact of public investment in supportive housing for homeless persons with severe mental disabilities. Data on 4,679 people placed in such housing in New York City between 1989 and 1997 were merged with data on the utilization of public shelters, public and private hospitals, and correctional facilities. A series of matched controls who were homeless but not placed in housing were similarly tracked. Regression results reveal that persons placed in supportive housing experience marked reductions in shelter use, hospitalizations, length of stay per hospitalization, and time incarcerated. Before placement, homeless people with severe mental illness used about


Development and Psychopathology | 1999

A prospective cohort study of neurodevelopmental processes in the genesis and epigenesis of schizophrenia.

Tyrone D. Cannon; Isabelle M. Rosso; Carrie E. Bearden; Laura E. Sanchez; Trevor R. Hadley

40,451 per person per year in services (1999 dollars). Placement was associated with a reduction in services use of


American Journal of Geriatric Psychiatry | 2005

Importance of Subsyndromal Symptoms of Depression in Elderly Patients

Mohit P. Chopra; Cynthia Zubritsky; Kathryn Knott; Thomas R. Ten Have; Trevor R. Hadley; James C. Coyne; David W. Oslin

16,281 per housing unit per year. Annual unit costs are estimated at


Pediatrics | 2004

Placement Changes and Emergency Department Visits in the First Year of Foster Care

David M. Rubin; Evaline A. Alessandrini; Chris Feudtner; A. Russell Localio; Trevor R. Hadley

17,277, for a net cost of


Schizophrenia Research | 2009

Paternal age as a risk factor for schizophrenia: How important is it?

E. Fuller Torrey; Stephen L. Buka; Tyrone D. Cannon; Jill M. Goldstein; Larry J. Seidman; Tianli Liu; Trevor R. Hadley; Isabelle M. Rosso; Carrie E. Bearden; Robert H. Yolken

995 per unit per year over the first two years.


JAMA Pediatrics | 2015

Predictors of Community Therapists' Use of Therapy Techniques in a Large Public Mental Health System

Rinad S. Beidas; Steven C. Marcus; Gregory A. Aarons; Kimberly Hoagwood; Sonja K. Schoenwald; Arthur C. Evans; Matthew O. Hurford; Trevor R. Hadley; Frances K. Barg; Lucia M. Walsh; Danielle R. Adams; David S. Mandell

A number of lines of evidence converge in implicating neurodevelopmental processes in the etiology and epigenesis of schizophrenia. In this study we used a prospective, longitudinal design to examine whether adverse obstetric experiences predict schizophrenia and whether there is a deviant functional-developmental trajectory during the first 7 years of life among individuals who manifest schizophrenia as adults. The 9,236 members of the Philadelphia cohort of the National Collaborative Perinatal Project were screened for mental health service utilization in adulthood, and chart reviews were performed to establish diagnoses according to DSM-IV criteria. The risk for schizophrenia increased linearly with the number of hypoxia-associated obstetric complications but was unrelated to maternal infection during pregnancy or fetal growth retardation. Preschizophrenic cases (and their unaffected siblings who were also cohort members) manifested cognitive impairment, abnormal involuntary movements and coordination deficits, and poor social adjustment during childhood. There was no evidence of intraindividual decline in any domain, but preschizophrenic cases did show deviance on an increasing number of functional indicators with age. Together, these findings suggest that both genetic and obstetric factors participate in creating a neural diathesis to schizophrenia, the phenotypic expressions of which are age dependent, probably reflecting the maturational status of a number of interconnected brain systems.


International Journal of Law and Psychiatry | 2011

Examining the impact of mental illness and substance use on recidivism in a county jail

Amy Blank Wilson; Jeffrey Draine; Trevor R. Hadley; Steve Metraux; Arthur C. Evans

OBJECTIVE There is a debate about the importance of subsyndromal symptoms of depression (SSD). The current study examined the cross-sectional and longitudinal significance of SSD in geriatric subjects both with and without a past history of major depression. METHODS Elderly primary-care subjects with SSD, both with (SSD+; N=54) and without (SSD-; N=204) a history of major depression, were compared with subjects with major depression (MDD; N=111), minor depression (MinD; N=74), and symptom-free comparison subjects (N=59). Assessment domains included physical and psychological disability, health-care utilization, hopelessness, death and suicidal ideation, and a diagnostic evaluation at a 3-month follow-up. RESULTS Both subjects with SSD+ and SSD- differed from the symptom-free comparison subjects on measures of psychological disability, hopelessness, and death ideation, with SSD+ subjects being more severely psychologically disabled than SSD- subjects. There were few differences between SSD+ and MinD subjects or those with MDD, except on measures of psychological disability. Finally, more than 24% of SSD+ subjects progressed to meet criteria of MDD, MinD, or dysthymia over a 3-month period. Utilization of outpatient services did not differ among any of the depression groups or comparison subjects. CONCLUSIONS SSD (with or without a past history of MDD) is associated with significant disability. Moreover, the risk of developing a diagnosis of MDD, MinD, or dysthymia is substantially elevated in subjects with a past history of MDD.


Journal of the American Academy of Child and Adolescent Psychiatry | 1995

The Current Practice of Child and Adolescent Partial Hospitalization: Results of a National Survey

Laurel J. Kiser; Dennis P. Culhane; Trevor R. Hadley

Objectives. Despite great needs, many children in foster care do not receive adequate medical care. Suboptimal care may be attributable in part to placement changes, which disrupt continuity of care by both a consistent surrogate parent and potentially a primary care physician. These disruptions in turn may lead to increased use of the emergency department (ED) for outpatient care. The primary aim of this study was to test whether a greater rate of placement changes was associated with increasing use of the ED among children in their first year of foster care. The secondary aim was to compare ED visit rates with rates of visits to other ambulatory care settings among children in foster care and other Medicaid-eligible children not in foster care. Methods. Using Medicaid claims linked to foster care administrative data, we assembled a retrospective cohort of foster children in a large urban municipality from 1993 to 1996. Eligible children spent at least 9 months in a new episode of foster care and were continuously eligible for Medicaid during a 1-year follow-up period. A comparison cohort was drawn from Medicaid-eligible children not in foster care during fiscal year 1995. The dependent variable was the rate of visits to the ED or other ambulatory care settings during a 1-year follow-up period. A negative binomial model estimated visit rates to the ED and other ambulatory care settings as the number of foster care placements increased. Potential interactions were considered between age and location of service use (ED or ambulatory care setting), between age and foster care placements, and between location of service use and number of foster care placements. Results. The 2358 children in the sample accounted for 1206 ED visits during the follow-up period; 38% experienced ≥2 placement changes. Children of all ages exhibited increasing reliance on the ED for ambulatory care services as the number of placements increased, with the rates of ED use more than doubling for all age groups beyond infancy. However, other ambulatory care service use increased by only 41% to 53%; there was much less utilization in these nonemergency settings for all children but particularly toddlers and infants, compared with their Medicaid-eligible peers. Although the absolute rates of all visits for younger foster children (<6 years of age) were low, older foster children had increasingly greater ED use than did their Medicaid-eligible peers, with nearly double the rate of ED visits in the adolescent age group. A temporal relationship between placements and ED visits was also identified; 75% of ED visits occurring within 3 weeks of a placement change occurred in the period after a placement change. Conclusions. Foster children received fewer overall outpatient services than did their Medicaid-eligible peers, but with age and increasing numbers of placements, had higher visit rates and received a greater proportion of their overall outpatient care in the ED. These results suggest that poor access to nonemergent ambulatory care settings might have contributed to an increasing reliance on ED settings as foster care placements increased. The temporal relationship between ED visits and placement changes underscores the need for better health care management for foster children, particularly in the period after placement changes.


Implementation Science | 2013

Policy to implementation: evidence-based practice in community mental health – study protocol

Rinad S. Beidas; Gregory A. Aarons; Frances K. Barg; Arthur C. Evans; Trevor R. Hadley; Kimberly Hoagwood; Steven C. Marcus; Sonia Schoenwald; Lucia M. Walsh; David S. Mandell

Advanced paternal age has been widely cited as a risk factor for schizophrenia among offspring and even claimed to account for one-quarter of all cases. We carried out a new study on 25,025 offspring from the Collaborative Perinatal Project (CPP), including 168 diagnosed with psychosis and 88 with narrowly defined schizophrenia. We also conducted a meta-analysis of this and nine other studies for which comparable age-cohort data were available. The mean paternal age for the CPP cases was slightly, but not significantly, higher than the matched controls (p=0.28). Meta-analyses including these new results were conducted to determine the relative risk associated with alternative definitions of advanced paternal age (35, 45 or 55 years and older). These yielded pooled odds ratios and 95% confidence intervals of 1.28 (1.10, 1.48), 1.38 (0.95, 2.01) and 2.22 (1.46, 3.37), respectively. Thus, increased paternal age appears to be a risk factor for schizophrenia primarily among offspring of fathers ages 55 and over. In these 10 studies, such fathers accounted for only 0.6% of all births. Compared with other known risk factors for schizophrenia, advanced paternal age appears to be intermediate in magnitude. Advanced paternal age is also known to be a risk factor for some chromosomal and neoplastic diseases in the offspring where the cause is thought to be chromosomal aberrations and mutations of the aging germline. Similar mechanisms may account for the relationship between advanced paternal age and schizophrenia risk.


Administration and Policy in Mental Health | 1992

Identifying and tracking “heavy users” of acute psychiatric inpatient services

Trevor R. Hadley; Dennis P. Culhane; Martin C. McGurrin

IMPORTANCE Few studies have examined the effects of individual and organizational characteristics on the use of evidence-based practices in mental health care. Improved understanding of these factors could guide future implementation efforts to ensure effective adoption, implementation, and sustainment of evidence-based practices. OBJECTIVE To estimate the relative contribution of individual and organizational factors on therapist self-reported use of cognitive-behavioral, family, and psychodynamic therapy techniques within the context of a large-scale effort to increase use of evidence-based practices in an urban public mental health system serving youth and families. DESIGN, SETTING, AND PARTICIPANTS In this observational, cross-sectional study of 23 organizations, data were collected from March 1 through July 25, 2013. We used purposive sampling to recruit the 29 largest child-serving agencies, which together serve approximately 80% of youth receiving publically funded mental health care. The final sample included 19 agencies with 23 sites, 130 therapists, 36 supervisors, and 22 executive administrators. MAIN OUTCOMES AND MEASURES Therapist self-reported use of cognitive-behavioral, family, and psychodynamic therapy techniques, as measured by the Therapist Procedures Checklist-Family Revised. RESULTS Individual factors accounted for the following percentages of the overall variation: cognitive-behavioral therapy techniques, 16%; family therapy techniques, 7%; and psychodynamic therapy techniques, 20%. Organizational factors accounted for the following percentages of the overall variation: cognitive-behavioral therapy techniques, 23%; family therapy techniques, 19%; and psychodynamic therapy techniques, 7%. Older therapists and therapists with more open attitudes were more likely to endorse use of cognitive-behavioral therapy techniques, as were those in organizations that had spent fewer years participating in evidence-based practice initiatives, had more resistant cultures, and had more functional climates. Women were more likely to endorse use of family therapy techniques, as were those in organizations employing more fee-for-service staff and with more stressful climates. Therapists with more divergent attitudes and less knowledge about evidence-based practices were more likely to use psychodynamic therapy techniques. CONCLUSIONS AND RELEVANCE This study suggests that individual and organizational factors are important in explaining therapist behavior and use of evidence-based practices, but the relative importance varies by therapeutic technique.

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David S. Mandell

University of Pennsylvania

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Dennis P. Culhane

University of Pennsylvania

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Arthur C. Evans

University of Pennsylvania

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Rinad S. Beidas

University of Pennsylvania

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Steven C. Marcus

University of Pennsylvania

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