Weintraub D.,University of Pennsylvania |
Weintraub D.,Parkinsons Disease Research Education and Clinical Center |
Weintraub D.,Mental Illness Research Education and Clinical Center |
Mamikonyan E.,University of Pennsylvania |
And 5 more authors.
Movement Disorders | Year: 2012
Impulse control disorders and related disorders (hobbyism-punding and dopamine dysregulation syndrome) occur in 15% to 20% of Parkinson's disease (PD) patients. We assessed the validity and reliability of the Questionnaire for Impulsive-Compulsive Disorders in Parkinson's Disease-Rating Scale (QUIP-RS), a rating scale designed to measure severity of symptoms and support a diagnosis of impulse control disorders and related disorders in PD. A convenience sample of PD patients at a movement disorders clinic self-completed the QUIP-RS and were administered a semistructured diagnostic interview by a blinded trained rater to assess discriminant validity for impulse control disorders (n = 104) and related disorders (n = 77). Subsets of patients were assessed to determine interrater reliability (n = 104), retest reliability (n = 63), and responsiveness to change (n = 29). Adequate cutoff points (both sensitivity and specificity values >80% plus acceptable likelihood ratios) were established for each impulse control disorder and hobbyism-punding. Interrater and retest reliability (intraclass correlation coefficient r) were >0.60 for all disorders. Participants in an impulse control disorder treatment study who experienced full (t = 3.65, P = .004) or partial (t = 2.98, P = .01) response demonstrated significant improvement on the rating scale over time, while nonresponders did not (t = 0.12, P = .91). The QUIP-RS appears to be valid and reliable as a rating scale for impulse control disorders and related disorders in PD. Preliminary results suggest that it can be used to support a diagnosis of these disorders, as well as to monitor changes in symptom severity over time. © 2011 Movement Disorder Society.
Fischer B.A.,Mental Illness Research Education and Clinical Center |
Fischer B.A.,University of Maryland Baltimore County
Journal of Nervous and Mental Disease | Year: 2012
The history of the Diagnostic and Statistical Manual of Mental Disorders (DSM) reflects the larger history of American psychiatry. As the field anticipates DSM-5, it is useful to take stock of this history and consider not only how diagnosis impacts our understanding of mental illness but also how contemporary thought influences diagnosis. Before the DSM, the field was disjointed. The publication of the first American diagnostic manual, the precursor of the DSM, mirrored society's interest in organized record keeping and prevention rather than treatment of mental illness. The first and second editions of DSM brought a common language to diagnosis and were largely the work of outpatient and academic psychiatrists rather than those based in large state hospitals. The third edition of the DSM saw the shift in American psychiatry's leadership from the eminent clinician to the researcher, whereas the fourth edition reflected the rise of "evidence-based medicine." DSM-5 will likewise represent the current status of the field-not only with regard to science but also reflecting the place of American psychiatry in medicine today. Copyright © 2012 by Lippincott Williams & Wilkins.
Brenner L.A.,Mental Illness Research Education and Clinical Center |
Ignacio R.V.,University of Colorado at Denver |
Ignacio R.V.,Veteran Affairs Serious Mental Illness Treatment Research and Evaluation Center |
Ignacio R.V.,University of Michigan |
And 2 more authors.
Journal of Head Trauma Rehabilitation | Year: 2011
OBJECTIVE:: To examine associations between history of traumatic brain injury (TBI) diagnosis and death by suicide among individuals receiving care within the Veterans Health Administration (VHA). METHOD:: Individuals who received care between fiscal years 2001 to 2006 were included in analyses. Cox proportional hazards survival models for time to suicide, with time-dependent covariates, were utilized. Covariance sandwich estimators were used to adjust for the clustered nature of the data, with patients nested within VHA facilities. Analyses included all patients with a history of TBI (n = 49626) plus a 5% random sample of patients without TBI (n = 389053). Of those with a history of TBI, 105 died by suicide. Models were adjusted for demographic and psychiatric covariates. RESULTS:: Veterans with a history of TBI were 1.55 (95% confidence interval [CI], 1.24-1.92) times more likely to die by suicide than those without a history of TBI. Analyses by TBI severity were also conducted, and they suggested that in comparison to those without an injury history, those with (1) concussion/cranial fracture were 1.98 times more likely (95% CI, 1.39-2.82) to die by suicide and (2) cerebral contusion/traumatic intracranial hemorrhage were 1.34 times more likely (95% CI, 1.09-1.64) to die by suicide. This increased risk was not explained by the presence of psychiatric disorders or demographic factors. CONCLUSIONS:: Among VHA users, those with a diagnosis of TBI were at greater risk for suicide than those without this diagnosis. Further research is indicated to identify evidence-based means of assessment and treatment for those with TBI and suicidal behavior. © 2011 Wolters Kluwer Health | Lippincott Williams & Wilkins.
Choi J.,Columbia University Medical Center |
Choi K.-H.,Korea University |
Felice Reddy L.,Mental Illness Research Education and Clinical Center |
Felice Reddy L.,University of California at Los Angeles |
And 2 more authors.
Schizophrenia Research | Year: 2014
Despite the important role of motivation in rehabilitation and functional outcomes in schizophrenia, to date, there has been little emphasis on how motivation is assessed. This is important, since different measures may tap potentially discrete motivational constructs, which in turn may have very different associations to important outcomes. In the current study, we used baseline data from 71 schizophrenia spectrum outpatients enrolled in a rehabilitation program to examine the relationship between task-specific motivation, as measured by the Intrinsic Motivation Inventory (IMI), and a more general state of volition/initiation, as measured by the three item Quality of Life (QLS) motivation index. We also examined the relationship of these motivation measures to demographic, clinical and functional variables relevant to rehabilitation outcomes. The two motivation measures were not correlated, and participants with low general state motivation exhibited a full range of task-specific motivation. Only the QLS motivation index correlated with variables relevant to rehabilitation outcomes. The lack of associations between QLS motivation index and IMI subscales suggests that constructs tapped by these measures may be divergent in schizophrenia, and specifically that task-specific intrinsic motivation is not contingent on a general state of motivation. That is, even in individuals with a general low motivational state (i.e. amotivation), interventions aimed at increasing task-specific motivation may still be effective. Moreover, the pattern of interrelationships between the QLS motivation index and variables relevant to psychosocial rehabilitation supports its use in treatment outcome studies. © 2014 Elsevier B.V.
Zeitzer J.M.,Stanford University |
Zeitzer J.M.,Mental Illness Research Education and Clinical Center
Progress in Molecular Biology and Translational Science | Year: 2013
Sleep and wake are actively promoted states of consciousness that are dependent on a network of state-modulating neurons arising from both the brain stem and hypothalamus. This network helps to coordinate the occurrence of a sleep state in billions of cortical neurons. In many neurological diseases, there is a specific disruption to one of the components of this network. Under conditions of such disruptions, we often gain an improved understanding of the underlying function of the specific component under nonpathological conditions. The loss or dysfunction of one of the hypothalamic or brain stem regions that are responsible for promotion of sleep or wake can lead to disruptions in sleep and wake states that are often subtle, but sometime quite pronounced and of significant medical importance. By understanding the neural substrate and its pathophysiology, one can more appropriately target therapies that might help the specific sleep disruption. This chapter reviews what is currently understood about the neurobiological underpinnings of sleep and wake regulation and how various pathologies evoke changes in these regulatory mechanisms. © 2013 Elsevier Inc.