Data-Driven Cutoff Selection for the Patient Health Questionnaire-9 Depression Screening Tool.

Importance: Test accuracy studies often use small datasets to simultaneously select an optimal cutoff score that maximizes test accuracy and generate accuracy estimates.

Objective: To evaluate the degree to which using data-driven methods to simultaneously select an optimal Patient Health Questionnaire-9 (PHQ-9) cutoff score and estimate accuracy yields (1) optimal cutoff scores that differ from the population-level optimal cutoff score and (2) biased accuracy estimates.

Design, Setting, And Participants: This study used cross-sectional data from an existing individual participant data meta-analysis (IPDMA) database on PHQ-9 screening accuracy to represent a hypothetical population.

Increased body sway in phobic patients exposed to images of spiders.

Objective: The aim of the present study was to analyze the body sway response in specific phobia (SP) patients and healthy controls while viewing neutral, phobic, and disgusting images.

Methods: The participants' heart rate (HR) and skin conductance were also recorded during the procedure. Nineteen patients with arachnophobia and 19 healthy volunteers matched by age, gender, and years of education underwent a postural control test on a stabilometric platform.

Patient Health Questionnaire-9 scores do not accurately estimate depression prevalence: individual participant data meta-analysis.

Objectives: Depression symptom questionnaires are not for diagnostic classification. Patient Health Questionnaire-9 (PHQ-9) scores ≥10 are nonetheless often used to estimate depression prevalence. We compared PHQ-9 ≥10 prevalence to Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders (SCID) major depression prevalence and assessed whether an alternative PHQ-9 cutoff could more accurately estimate prevalence.

Probability of major depression diagnostic classification using semi-structured versus fully structured diagnostic interviews.

Background: Different diagnostic interviews are used as reference standards for major depression classification in research. Semi-structured interviews involve clinical judgement, whereas fully structured interviews are completely scripted. The Mini International Neuropsychiatric Interview (MINI), a brief fully structured interview, is also sometimes used.

Screening of cognitive impairment in patients with Parkinson's disease: diagnostic validity of the Brazilian versions of the Montreal Cognitive Assessment and the Addenbrooke's Cognitive Examination-Revised.

Objective: The aim of the present study is to examine the accuracy of the Brazilian versions of the Montreal Cognitive Assessment (MoCA) and the Addenbrooke's Cognitive Examination-Revised (ACE-R) to screen for mild cognitive impairment (PDMCI) and dementia (PDD) in patients with Parkinson's disease (PD).

Method: Both scales were administered to a final convenience sample of 79 patients with PD. Patients were evaluated by a neurologist, a psychiatrist and a neuropsychologist using UPDRS, Hoehn and Yahr and Schwab and England scales, global deterioration scale, a psychiatric structured interview, Mattis Dementia Rating Scale and other cognitive tests.

Screening tools for psychiatry disorders in cancer setting: Caution when using.

This study evaluated sensitivity/specificity of self-report instruments for the screening of psychiatric disorders/symptoms in cancer outpatients like: current/past major depression, dysthymia, alcohol abuse and dependence, tobacco abuse and dependence, panic disorder, social anxiety disorder, generalized anxiety disorder, obsessive compulsive disorder, posttraumatic stress disorder, phobias, current mania, delusion and hallucination. First, 1384 patients responded to several self-assessment instruments. Then, 400 patients, were then interviewed by telephone to confirm the presence/absence of psychiatric diagnosis.

Structural and functional neuroimaging findings associated with the use of clozapine in schizophrenia: a systematic review.

Objective: Schizophrenia is one of the most severe psychiatric disorders, and its current treatment relies on antipsychotic medications with only partial effectiveness. Clozapine is an atypical antipsychotic with a specific profile of action indicated for treatment-resistant schizophrenia. Neuroimaging studies assessing the effects of clozapine could help shed light on the neural underpinnings of the effects of this drug in the brain.

Excessive fragmentary myoclonus in patients with Parkinson's disease: prevalence and clinico-polysomnographic profile.

Objective And Background: Excessive fragmentary myoclonus (EFM) is characterized by subtle arrhythmic and excessive jerks that are usually asymmetric and asynchronous. EFM occurs in different areas of the body, mainly the face and distal parts of the arms and legs, and is detected by surface electromyography during sleep. The present study aimed to determine the prevalence of EFM in Parkinson's disease (PD) patients at a tertiary level outpatient clinic as well as to describe the clinical and polysomnographic profiles of these patients.

Assessment and screening of panic disorder in cancer patients: performance of the PHQ-PD.

Objective: This study's objective was to promote the transcultural adaptation of the Patient Health Questionnaire-Panic Disorder Module (PHQ-PD) for Brazilian Portuguese and to evaluate the discriminative validity of this scale in detecting PD among cancer patients.

Methods: Adult cancer outpatients (n=400) from a specialized cancer hospital (61.50% female; 68.

Effects of cannabidiol in the treatment of patients with Parkinson's disease: an exploratory double-blind trial.

Introduction: Parkinson's disease (PD) has a progressive course and is characterized by the degeneration of dopaminergic neurons. Although no neuroprotective treatments for PD have been found to date, the endocannabinoid system has emerged as a promising target.

Methods: From a sample of 119 patients consecutively evaluated in a specialized movement disorders outpatient clinic, we selected 21 PD patients without dementia or comorbid psychiatric conditions.

Oxytocin does not improve performance of patients with schizophrenia and healthy volunteers in a facial emotion matching task.

The neuropeptide oxytocin improves the performance in facial emotion recognition tests in healthy volunteers and in individuals with schizophrenia. Different paradigms are used in emotion recognition tasks, engaging different neurobiological bases. To date, the effects of oxytocin in facial emotion matching tasks have not been studied.

Depression increases in patients with Parkinson?s disease according to the increasing severity of the cognitive impairment.

Objective: To test the hypothesis that severity of cognitive impairment modifies the association between depression and Parkinson's disease (PD).

Method: One-phase population-based door-to-door surveys. This is a secondary analysis of 1,451 people aged 65 years and older with cognitive impairment living in defined catchment areas.

Increased amygdalar and hippocampal volumes in young adults with social anxiety.

Background: Functional neuroimaging studies have consistently shown abnormal limbic activation patterns in socially anxious individuals, but structural data on the amygdala and hippocampus of these patients are scarce. This study explored the existence of structural differences in the whole brain, amygdala, and hippocampus of subjects with clinical and subthreshold social anxiety compared to healthy controls. We hypothesized that there would be volumetric differences across groups, without predicting their direction (i.

Rimonabant effects on anxiety induced by simulated public speaking in healthy humans: a preliminary report.

Objective: We investigated the hypothesis that rimonabant, a cannabinoid antagonist/inverse agonist, would increase anxiety in healthy subjects during a simulation of the public speaking test.

Methods: Participants were randomly allocated to receive oral placebo or 90 mg rimonabant in a double-blind design. Subjective effects were measured by Visual Analogue Mood Scale.

Brazilian Medical Association guidelines for the diagnosis and differential diagnosis of panic disorder.

Objective: To present the most relevant findings regarding the Brazilian Medical Association guidelines for the diagnosis and differential diagnosis of panic disorder.

Methods: We used the methodology proposed by the Brazilian Medical Association for the Diretrizes Project. The MEDLINE (PubMed), Scopus, Web of Science, and LILACS online databases were queried for articles published from 1980 to 2012.

Acute and chronic administration of cannabidiol increases mitochondrial complex and creatine kinase activity in the rat brain.

Objective: To investigate the effects of cannabidiol (CBD) on mitochondrial complex and creatine kinase (CK) activity in the rat brain using spectrophotometry.

Method: Male adult Wistar rats were given intraperitoneal injections of vehicle or CBD (15, 30, or 60 mg/kg) in an acute (single dose) or chronic (once daily for 14 consecutive days) regimen. The activities of mitochondrial complexes and CK were measured in the hippocampus, striatum, and prefrontal cortex.

Neuroimaging of depression in Parkinson's disease: a review.

Background: Depression is the most common psychiatric manifestation in patients with Parkinson's disease (PD). In addition, depressive symptoms may be considered to be a prodromal manifestation of PD. In recent years, the association between PD and depression has been the focus of neuroimaging studies using functional and structural techniques.

Validation and internal consistency of Patient Health Questionnaire-9 for major depression in Parkinson's disease.

Background: depression is common in Parkinson's disease (PD), although frequently under-recognised. Among the scales used to investigate depressive features in PD, the Patient Health Questionnaire-9 (PHQ-9) has been largely used, but no specific cut-off scores for depression have been established thus far, which hinders the use of the PHQ-9 in clinical and research settings.

Objective: we assessed the discriminant validity of the PHQ-9 in order to establish the best cut-off score for the diagnosis of major depression in PD patients.

[Adherence to medication among patients with Parkinson's disease treated at a specialized outpatient unit].

Parkinson's disease is universal and the second most prevalent neurodegenerative disease among the elderly affecting between 0.5 and 1% of the population between 65 and 69 years of age. Adherence to medication is considered the main determinant for the effectiveness of treatment, but only recently has it been studied in patients with Parkinson's disease.

Effects of acute systemic administration of cannabidiol on sleep-wake cycle in rats.

Unlabelled: Cannabidiol (CBD) is one of the main components of Cannabis sativa and has a wide spectrum of action, including effects in the sleep-wake cycle.

Objective: The objective of this paper is to assess the effects on sleep of acute systemic administration of CBD.

Method: Adult male Wistar rats were randomly distributed into four groups that received intraperitoneal injections of CBD 2.