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1.
Dev Psychopathol ; 33(1): 53-64, 2021 02.
Artículo en Inglés | MEDLINE | ID: mdl-31959269

RESUMEN

Evidence suggests that early trauma may have a negative effect on cognitive functioning in individuals with psychosis, yet the relationship between childhood trauma and cognition among those at clinical high risk (CHR) for psychosis remains unexplored. Our sample consisted of 626 CHR children and 279 healthy controls who were recruited as part of the North American Prodrome Longitudinal Study 2. Childhood trauma up to the age of 16 (psychological, physical, and sexual abuse, emotional neglect, and bullying) was assessed by using the Childhood Trauma and Abuse Scale. Multiple domains of cognition were measured at baseline and at the time of psychosis conversion, using standardized assessments. In the CHR group, there was a trend for better performance in individuals who reported a history of multiple types of childhood trauma compared with those with no/one type of trauma (Cohen d = 0.16). A history of multiple trauma types was not associated with greater cognitive change in CHR converters over time. Our findings tentatively suggest there may be different mechanisms that lead to CHR states. Individuals who are at clinical high risk who have experienced multiple types of childhood trauma may have more typically developing premorbid cognitive functioning than those who reported minimal trauma do. Further research is needed to unravel the complexity of factors underlying the development of at-risk states.


Asunto(s)
Acoso Escolar , Trastornos Psicóticos , Niño , Cognición , Humanos , Estudios Longitudinales , Síntomas Prodrómicos
2.
Behav Cogn Psychother ; 48(2): 248-252, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-30982487

RESUMEN

BACKGROUND: Metacognition refers to the ability to evaluate and control our cognitive processes. While studies have investigated metacognition in schizophrenia and clinical high risk for psychosis (CHR), less is known about the potential mechanisms which result in metacognitive deficits. AIMS: We aimed to investigate whether neurocognitive functions including attention, working memory, verbal learning and executive functions predicted the tendency to focus on one's thoughts (cognitive self-consciousness) and beliefs in the efficacy of one's cognitive skills (cognitive confidence). METHOD: Participants (130 CHR individuals) were recruited as part of the multi-site PREDICT study. They were assessed using the Metacognitions Questionnaire (MCQ) as well as measures of executive function (WCST), attention (N-Back), working memory (LNS) and verbal learning (AVLT). RESULTS: Cognitive competence was negatively correlated with N-Back while cognitive self-consciousness was positively correlated with N-Back and LNS. Linear regression analysis with N-Back, AVLT, LNS and WCST as predictors showed that neurocognition significantly predicted cognitive self-consciousness, with N-Back, LNS and WCST as significant predictors. The model accounted for 14% of the variance in cognitive self-consciousness. However, neurocognition did not result in a significant predictive model of cognitive competence. CONCLUSIONS: Neurocognition was associated with an increased focus on one's thoughts, but it was not associated with higher confidence in one's cognitive skills. Neurocognition accounted for less than one-sixth of the variance in metacognition, suggesting that interventions that target neurocognition are unlikely to improve metacognitive abilities.


Asunto(s)
Función Ejecutiva , Metacognición , Modelos Psicológicos , Trastornos Psicóticos/psicología , Atención , Emociones , Femenino , Humanos , Masculino , Memoria a Corto Plazo , Encuestas y Cuestionarios , Aprendizaje Verbal , Adulto Joven
3.
Psychol Med ; 48(6): 983-997, 2018 04.
Artículo en Inglés | MEDLINE | ID: mdl-28874223

RESUMEN

BACKGROUND: Attenuated positive symptom syndrome (APSS), characterized by 'putatively prodromal' attenuated psychotic-like pathology, indicates increased risk for psychosis. Poor premorbid social adjustment predicts severity of APSS symptoms and predicts subsequent psychosis in APSS-diagnosed individuals, suggesting application for improving detection of 'true' prodromal youth who will transition to psychosis. However, these predictive associations have not been tested in controls and therefore may be independent of the APSS diagnosis, negating utility for improving prediction in APSS-diagnosed individuals. METHOD: Association between premorbid social maladjustment and severity of positive, negative, disorganized, and general APSS symptoms was tested in 156 individuals diagnosed with APSS and 76 help-seeking (non-APSS) controls enrolled in the Enhancing the Prospective Prediction of Psychosis (PREDICT) study using prediction analysis. RESULTS: Premorbid social maladjustment was associated with social anhedonia, reduced expression of emotion, restricted ideational richness, and deficits in occupational functioning, independent of the APSS diagnosis. Associations between social maladjustment and suspiciousness, unusual thought content, avolition, dysphoric mood, and impaired tolerance to normal stress were uniquely present in participants meeting APSS criteria. Social maladjustment was associated with odd behavior/appearance and diminished experience of emotions and self only in participants who did not meet APSS criteria. CONCLUSIONS: Predictive associations between poor premorbid social adjustment and attenuated psychotic-like pathology were identified, a subset of which were indicative of high risk for psychosis. This study offers a method for improving risk identification while ruling out low-risk individuals.


Asunto(s)
Trastornos Psicóticos/diagnóstico , Trastornos Psicóticos/psicología , Ajuste Social , Adolescente , Adulto , Femenino , Conducta de Búsqueda de Ayuda , Humanos , Masculino , Síntomas Prodrómicos , Estudios Prospectivos , Escalas de Valoración Psiquiátrica , Medición de Riesgo , Adulto Joven
4.
Psychol Med ; 45(11): 2275-84, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-25727300

RESUMEN

BACKGROUND: A series of research reports has indicated that the use of substances such as cannabis, alcohol and tobacco are higher in youth at clinical high risk (CHR) of developing psychosis than in controls. Little is known about the longitudinal trajectory of substance use, and findings on the relationship between substance use and later transition to psychosis in CHR individuals are mixed. METHOD: At baseline and 6- and 12-month follow-ups, 735 CHR and 278 control participants completed the Alcohol and Drug Use Scale and a cannabis use questionnaire. The longitudinal trajectory of substance use was evaluated with linear mixed models. RESULTS: CHR participants endorsed significantly higher cannabis and tobacco use severity, and lower alcohol use severity, at baseline and over a 1-year period compared with controls. CHR youth had higher lifetime prevalence and frequency of cannabis, and were significantly younger upon first use, and were more likely to use alone and during the day. Baseline substance use did not differentiate participants who later transitioned to psychosis (n = 90) from those who did not transition (n = 272). Controls had lower tobacco use than CHR participants with a prodromal progression clinical outcome and lower cannabis use than those with a psychotic clinical outcome at the 2-year assessment. CONCLUSIONS: In CHR individuals cannabis and tobacco use is higher than in controls and this pattern persists across 1 year. Evaluation of clinical outcome may provide additional information on the longitudinal impact of substance use that cannot be detected through evaluation of transition/non-transition to psychosis alone.


Asunto(s)
Síntomas Prodrómicos , Trastornos Psicóticos/diagnóstico , Trastornos Relacionados con Sustancias/clasificación , Trastornos Relacionados con Sustancias/epidemiología , Adolescente , Adulto , Cannabis , Estudios de Casos y Controles , Progresión de la Enfermedad , Femenino , Humanos , Modelos Lineales , Estudios Longitudinales , Masculino , Escalas de Valoración Psiquiátrica , Factores de Riesgo , Índice de Severidad de la Enfermedad , Nicotiana , Adulto Joven
5.
Acta Psychiatr Scand ; 132(1): 60-8, 2015 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-25572323

RESUMEN

OBJECTIVE: Cannabis use has been examined as a predictor of psychosis in clinical high-risk (CHR) samples, but little is known about the impact of other substances on this relationship. METHOD: Substance use was assessed in a large sample of CHR participants (N = 370, mean age = 18.3) enrolled in the multisite North American Prodrome Longitudinal Study Phase 1 project. Three hundred and forty-one participants with cannabis use data were divided into groups: No Use (NU, N = 211); Cannabis Use without impairment (CU, N = 63); Cannabis Abuse/Dependence (CA/CD, N = 67). Participants (N = 283) were followed for ≥2 years to determine psychosis conversion. RESULTS: Alcohol (45.3%) and cannabis (38.1%) were the most common substances. Cannabis use groups did not differ on baseline attenuated positive symptoms. Seventy-nine of 283 participants with cannabis and follow-up data converted to psychosis. Survival analysis revealed significant differences between conversion rates in the CA/CD group compared with the No Use (P = 0.031) and CU group (P = 0.027). CA/CD also significantly predicted psychosis in a regression analysis, but adjusting for alcohol use weakened this relationship. CONCLUSION: The cannabis misuse and psychosis association was confounded by alcohol use. Non-impairing cannabis use was not related to psychosis. Results highlight the need to control for other substance use, so as to not overstate the cannabis/psychosis connection.


Asunto(s)
Trastornos Relacionados con Alcohol/epidemiología , Abuso de Marihuana/epidemiología , Psicosis Inducidas por Sustancias/epidemiología , Trastornos Psicóticos/epidemiología , Asunción de Riesgos , Adolescente , Trastornos Relacionados con Alcohol/psicología , Causalidad , Comorbilidad , Progresión de la Enfermedad , Femenino , Humanos , Masculino , Abuso de Marihuana/psicología , Psicosis Inducidas por Sustancias/psicología , Trastornos Psicóticos/psicología , Medición de Riesgo , Factores de Riesgo , Estados Unidos/epidemiología , Adulto Joven
6.
Psychol Psychother ; 97(2): 354-371, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38353112

RESUMEN

OBJECTIVES: We investigated the effect of the therapeutic alliance on both change in social recovery outcomes and usage of a moderated online social therapy platform for first-episode psychosis (FEP), Horyzons. DESIGN: Secondary analysis of a single group pilot trial. METHODS: Clients completed an alliance measure adapted for guided digital interventions at mid-treatment. A series of multi-level models evaluated change in outcomes by mid- and post-treatment assessments (relative to baseline) as a function of the overall alliance. Quasi-Poisson models evaluated the effect of the overall alliance on aggregated counts of platform usage. Exploratory analyses repeated these models in terms of the bond (human-human) or the task/goal (human-program) alliance. RESULTS: Stronger overall alliance at mid-treatment predicted lower loneliness at mid-treatment and lower social anxiety at mid- and post-treatment. It was also associated with higher completion of therapy activities and authoring of comments and reactions. A strong bond with an online therapist was associated with lower loneliness and higher perceived social support at mid-treatment, lower social anxiety at post-treatment as well as a higher number of reactions made on the social network. Stronger alliance with the platform's tasks and goals facilitated lower social anxiety at both follow-up assessments and was further associated with higher completion of therapy activities and reactions in the social network. CONCLUSIONS: The alliance may impact aspects of social recovery and usage in digital interventions for FEP. Specific aspects of the alliance (human-human and human-program relationships) should be considered in future research.


Asunto(s)
Trastornos Psicóticos , Alianza Terapéutica , Humanos , Femenino , Trastornos Psicóticos/terapia , Trastornos Psicóticos/psicología , Masculino , Adulto , Adulto Joven , Proyectos Piloto , Soledad/psicología , Apoyo Social , Intervención basada en la Internet , Resultado del Tratamiento
7.
Mol Psychiatry ; 16(1): 76-85, 2011 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19721433

RESUMEN

Schizophrenia is an often devastating neuropsychiatric illness. Understanding the genetic variation affecting response to antipsychotics is important to develop novel diagnostic tests to match individual schizophrenia patients to the most effective and safe medication. In this study, we use a genome-wide approach to detect genetic variation underlying individual differences in response to treatment with the antipsychotics olanzapine, quetiapine, risperidone, ziprasidone and perphenazine. Our sample consisted of 738 subjects with DSM-IV schizophrenia who took part in the Clinical Antipsychotic Trials of Intervention Effectiveness. Subjects were genotyped using the Affymetrix 500 K genotyping platform plus a custom 164 K chip to improve genome-wide coverage. Treatment outcome was measured using the Positive and Negative Syndrome Scale. Our criterion for genome-wide significance was a prespecified threshold that ensures that, on an average, only 10% of the significant findings are false discoveries. The top statistical result reached significance at our prespecified threshold and involved a single-nucleotide polymorphism (SNP) in an intergenic region on chromosome 4p15. In addition, SNPs in Ankyrin Repeat and Sterile Alpha Motif Domain-Containing Protein 1B (ANKS1B) and in the Contactin-Associated Protein-Like 5 gene (CNTNAP5), which mediated the effects of olanzapine and risperidone on Negative symptoms, were very close to our threshold for declaring significance. The most significant SNP in CNTNAP5 is nonsynonymous, giving rise to an amino-acid substitution. In addition to highlighting our top results, we provide all P-values for download as a resource for investigators with the requisite samples to carry out replication. This study demonstrates the potential of genome-wide association studies to discover novel genes that mediate the effects of antipsychotics, which could eventually help to tailor drug treatment to schizophrenic patients.


Asunto(s)
Antipsicóticos/uso terapéutico , Cromosomas Humanos Par 4 , Farmacogenética , Esquizofrenia/tratamiento farmacológico , Esquizofrenia/genética , Antipsicóticos/clasificación , Benzodiazepinas/uso terapéutico , Dibenzotiazepinas/uso terapéutico , Método Doble Ciego , Estudios de Seguimiento , Estudio de Asociación del Genoma Completo , Humanos , Olanzapina , Perfenazina/uso terapéutico , Piperazinas/uso terapéutico , Polimorfismo de Nucleótido Simple , Fumarato de Quetiapina , Risperidona/uso terapéutico , Tiazoles/uso terapéutico , Resultado del Tratamiento
8.
Schizophr Res ; 227: 28-37, 2021 01.
Artículo en Inglés | MEDLINE | ID: mdl-32362460

RESUMEN

BACKGROUND: Severity of negative symptoms has been associated with poor functioning, cognitive deficits, and defeatist beliefs in schizophrenia patients. However, one area that remains understudied is persistent negative symptoms (PNS). Negative symptoms, including PNS, have been observed in those at clinical high-risk (CHR) for psychosis. The aim of this study was to determine if PNS were associated with functioning, neurocognition, and defeatist beliefs in a CHR sample. METHOD: CHR participants (n = 764) were recruited for the North American Prodrome Longitudinal Study. Negative symptoms were rated on the Scale of Psychosis-risk Symptoms. Generalized linear mixed models for repeated measures were used to examine changes over time between and within groups (PNS vs non-PNS). RESULTS: The PNS group (n = 67) had significant deficits in functioning at baseline, 6, 12, 18, and 24-months compared to the non-PNS group (n = 673). Functioning improved over time in the non-PNS group, while functioning in the PNS group remained relatively stable and poor over a two-year period. A consistent trend emerged demonstrating higher defeatist beliefs in the PNS group; however, this result was lost when controlling for persistent depressive symptoms. There were no significant differences between the groups on neurocognition, social cognition, and transition to psychosis. CONCLUSIONS: PNS exist in youth at CHR for psychosis, resulting in significant and persistent functional impairment, which remains when controlling for persistent depressive symptoms. PNS remain even in CHR youth who do not transition to psychosis. Thus, PNS may represent an unmet therapeutic need in CHR populations for which there are currently no effective treatments.


Asunto(s)
Trastornos del Conocimiento , Trastornos Psicóticos , Esquizofrenia , Adolescente , Humanos , Estudios Longitudinales , Síntomas Prodrómicos , Trastornos Psicóticos/complicaciones , Trastornos Psicóticos/epidemiología , Esquizofrenia/complicaciones , Esquizofrenia/epidemiología
9.
Schizophr Res ; 204: 334-336, 2019 02.
Artículo en Inglés | MEDLINE | ID: mdl-30181061

RESUMEN

Social cognition deficits have been observed in individuals at clinical high risk (CHR) for psychosis. Longitudinal change in social cognition were analyzed in CHR individuals from the North American Prodrome Longitudinal Study (NAPLS2) based on outcome at 24 months. Individuals (n = 359) were classified into remission, symptomatic, prodromal progression and transition to psychosis (CHR-T) groups. Social cognition was assessed using theory of mind, emotion perception, and social perception tasks. There were no differences at baseline or 24 months between the groups on social cognition. Non-transition groups improved significantly over time on social cognition, but CHR-T did not show this effect.


Asunto(s)
Progresión de la Enfermedad , Emociones/fisiología , Reconocimiento Facial/fisiología , Síntomas Prodrómicos , Trastornos Psicóticos/fisiopatología , Percepción Social , Teoría de la Mente/fisiología , Adulto , Expresión Facial , Femenino , Humanos , Estudios Longitudinales , Masculino , Inducción de Remisión , Riesgo , Adulto Joven
10.
Schizophr Res ; 208: 390-396, 2019 06.
Artículo en Inglés | MEDLINE | ID: mdl-30777603

RESUMEN

INTRODUCTION: A faster and more accurate self-report screener for early psychosis is needed to promote early identification and intervention. METHODS: Self-report Likert-scale survey items were administered to individuals being screened with the Structured Interview for Psychosis-risk Syndromes (SIPS) and followed at eight early psychosis clinics. An a priori analytic plan included Spectral Clustering Analysis to reduce the item pool, followed by development of Support Vector Machine (SVM) classifiers. RESULTS: The cross-validated positive predictive value (PPV) of the EPSI at the default cut-off (76.5%) exceeded that of the clinician-administered SIPS (68.5%) at separating individuals who would not convert to psychosis within 12 months from those who either would convert within 12 months or who had already experienced a first episode psychosis (FEP). When used in tandem with the SIPS on clinical high risk participants, the EPSI increased the combined PPV to 86.6%. The SVM classified as FEP/converters only 1% of individuals in non-clinical and 4% of clinical low risk populations. Sensitivity of the EPSI, however, was 51% at the default cut-off. DISCUSSION: The EPSI identifies, comparably to the SIPS but in less time and with fewer resources, individuals who are either at very high risk to develop a psychotic disorder within 12 months or who are already psychotic. At its default cut-off, EPSI misses 49% of current or future psychotic cases. The cut-off can, however, be adjusted based on purpose. The EPSI is the first validated assessment to predict 12-month psychotic conversion. An online screening system, www.eps.telesage.org, is under development.


Asunto(s)
Diagnóstico por Computador , Internet , Aprendizaje Automático , Trastornos Psicóticos/diagnóstico , Diagnóstico Precoz , Humanos , Valor Predictivo de las Pruebas , Trastornos Psicóticos/psicología , Medición de Riesgo , Máquina de Vectores de Soporte
11.
Schizophr Res ; 197: 504-508, 2018 07.
Artículo en Inglés | MEDLINE | ID: mdl-29254878

RESUMEN

A panel of experts assembled and analyzed a comprehensive item bank from which a highly sensitive and specific early psychosis screener could be developed. Twenty well-established assessments relating to the prodromal stage, early psychosis, and psychosis were identified. Using DSM-5 criteria, we identified the core concepts represented by each of the items in each of the assessments. These granular core concepts were converted into a uniform set of 490 self-report items using a Likert scale and a 'past 30days' time frame. Partial redundancy was allowed to assure adequate concept coverage. A panel of experts and TeleSage staff rated these items and eliminated 189 items, resulting in 301 items. The items were subjected to five rounds of cognitive interviewing with 16 individuals at clinically high risk for psychosis and 26 community mental health center patients. After each round, the expert panel iteratively reviewed, rated, revised, added, or deleted items to maximize clarity and centrality to the concept. As a result of the interviews, 36 items were revised, 52 items were added, and 205 items were deleted. By the last round of cognitive interviewing, all of the items were clearly understood by all participants. In future work, responses to the final set of 148 items and machine learning techniques will be used to quantitatively identify the subset of items that will best predict clinical high-risk status and conversion.


Asunto(s)
Síntomas Prodrómicos , Escalas de Valoración Psiquiátrica/normas , Psicometría/normas , Trastornos Psicóticos/diagnóstico , Esquizofrenia/diagnóstico , Autoinforme/normas , Adolescente , Adulto , Niño , Femenino , Humanos , Entrevista Psicológica , Masculino , Psicometría/instrumentación , Psicometría/métodos , Adulto Joven
12.
Schizophr Res ; 197: 516-521, 2018 07.
Artículo en Inglés | MEDLINE | ID: mdl-29358019

RESUMEN

Machine learning techniques were used to identify highly informative early psychosis self-report items and to validate an early psychosis screener (EPS) against the Structured Interview for Psychosis-risk Syndromes (SIPS). The Prodromal Questionnaire-Brief Version (PQ-B) and 148 additional items were administered to 229 individuals being screened with the SIPS at 7 North American Prodrome Longitudinal Study sites and at Columbia University. Fifty individuals were found to have SIPS scores of 0, 1, or 2, making them clinically low risk (CLR) controls; 144 were classified as clinically high risk (CHR) (SIPS 3-5) and 35 were found to have first episode psychosis (FEP) (SIPS 6). Spectral clustering analysis, performed on 124 of the items, yielded two cohesive item groups, the first mostly related to psychosis and mania, the second mostly related to depression, anxiety, and social and general work/school functioning. Items within each group were sorted according to their usefulness in distinguishing between CLR and CHR individuals using the Minimum Redundancy Maximum Relevance procedure. A receiver operating characteristic area under the curve (AUC) analysis indicated that maximal differentiation of CLR and CHR participants was achieved with a 26-item solution (AUC=0.899±0.001). The EPS-26 outperformed the PQ-B (AUC=0.834±0.001). For screening purposes, the self-report EPS-26 appeared to differentiate individuals who are either CLR or CHR approximately as well as the clinician-administered SIPS. The EPS-26 may prove useful as a self-report screener and may lead to a decrease in the duration of untreated psychosis. A validation of the EPS-26 against actual conversion is underway.


Asunto(s)
Aprendizaje Automático , Síntomas Prodrómicos , Escalas de Valoración Psiquiátrica/normas , Trastornos Psicóticos/diagnóstico , Esquizofrenia/diagnóstico , Autoinforme/normas , Adolescente , Adulto , Femenino , Humanos , Entrevista Psicológica , Estudios Longitudinales , Masculino , Riesgo , Adulto Joven
13.
Transl Psychiatry ; 7(1): e993, 2017 01 10.
Artículo en Inglés | MEDLINE | ID: mdl-28072414

RESUMEN

We performed a genome-wide association study of 6447 bipolar disorder (BD) cases and 12 639 controls from the International Cohort Collection for Bipolar Disorder (ICCBD). Meta-analysis was performed with prior results from the Psychiatric Genomics Consortium Bipolar Disorder Working Group for a combined sample of 13 902 cases and 19 279 controls. We identified eight genome-wide significant, associated regions, including a novel associated region on chromosome 10 (rs10884920; P=3.28 × 10-8) that includes the brain-enriched cytoskeleton protein adducin 3 (ADD3), a non-coding RNA, and a neuropeptide-specific aminopeptidase P (XPNPEP1). Our large sample size allowed us to test the heritability and genetic correlation of BD subtypes and investigate their genetic overlap with schizophrenia and major depressive disorder. We found a significant difference in heritability of the two most common forms of BD (BD I SNP-h2=0.35; BD II SNP-h2=0.25; P=0.02). The genetic correlation between BD I and BD II was 0.78, whereas the genetic correlation was 0.97 when BD cohorts containing both types were compared. In addition, we demonstrated a significantly greater load of polygenic risk alleles for schizophrenia and BD in patients with BD I compared with patients with BD II, and a greater load of schizophrenia risk alleles in patients with the bipolar type of schizoaffective disorder compared with patients with either BD I or BD II. These results point to a partial difference in the genetic architecture of BD subtypes as currently defined.


Asunto(s)
Trastorno Bipolar/genética , Trastornos Psicóticos/genética , Aminopeptidasas/genética , Ancirinas/genética , Trastorno Bipolar/clasificación , Trastorno Bipolar/psicología , Canales de Calcio Tipo L/genética , Proteínas de Unión a Calmodulina/genética , Estudios de Casos y Controles , Cromosomas Humanos Par 10/genética , Proteínas del Citoesqueleto , Estudio de Asociación del Genoma Completo , Genotipo , Humanos , Proteínas del Tejido Nervioso/genética , Proteínas Nucleares/genética , Fenotipo , Polimorfismo de Nucleótido Simple , Trastornos Psicóticos/psicología
14.
Schizophr Res ; 86(1-3): 234-43, 2006 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-16887334

RESUMEN

Few studies have assessed the comparative efficacy and safety of atypical and typical antipsychotic medications in patients within their first episode of psychosis. This study examined the effectiveness of the atypical antipsychotic olanzapine and the typical antipsychotic haloperidol in patients experiencing their first episode of a schizophrenia-related psychotic disorder over a 2-year treatment period. Two hundred and sixty-three patients were randomized to olanzapine or haloperidol in a doubleblind, multisite, international 2-year study. Clinical symptoms and side effects were assessed at baseline and longitudinally following randomization for the duration of the study. Olanzapine and haloperidol treatment were both associated with substantial and comparable reductions in symptom severity (the primary outcome measure) over the course of the study. However, the treatment groups differed on two secondary efficacy measures. Patients were less likely to discontinue treatment with olanzapine than with haloperidol: mean time (in days) in the study was significantly greater for those treated with olanzapine compared to haloperidol (322.09 vs. 230.38, p<0.0085). Moreover, remission rates were greater in patients treated with olanzapine as compared to those treated with haloperidol (57.25% vs. 43.94%, p<0.036). While extrapyramidal side effects were greater in those treated with haloperidol, weight gain, cholesterol level and liver function values were greater in patients treated with olanzapine. The data from this study suggest some clinical benefits for olanzapine as compared to haloperidol in first episode patients, which must be weighed against those adverse effects that are more likely with olanzapine.


Asunto(s)
Antipsicóticos/uso terapéutico , Haloperidol/uso terapéutico , Trastornos Psicóticos/tratamiento farmacológico , Adulto , Antipsicóticos/efectos adversos , Benzodiazepinas/efectos adversos , Benzodiazepinas/uso terapéutico , Método Doble Ciego , Femenino , Estudios de Seguimiento , Haloperidol/efectos adversos , Humanos , Cooperación Internacional , Masculino , Pruebas Neuropsicológicas , Olanzapina , Escalas de Valoración Psiquiátrica/estadística & datos numéricos , Resultado del Tratamiento
15.
Transl Psychiatry ; 6(12): e981, 2016 12 13.
Artículo en Inglés | MEDLINE | ID: mdl-27959328

RESUMEN

Dysregulation of immune system functions has been implicated in schizophrenia, suggesting that immune cells may be involved in the development of the disorder. With the goal of a biomarker assay for psychosis risk, we performed small RNA sequencing on RNA isolated from circulating immune cells. We compared baseline microRNA (miRNA) expression for persons who were unaffected (n=27) or who, over a subsequent 2-year period, were at clinical high risk but did not progress to psychosis (n=37), or were at high risk and did progress to psychosis (n=30). A greedy algorithm process led to selection of five miRNAs that when summed with +1 weights distinguished progressed from nonprogressed subjects with an area under the receiver operating characteristic curve of 0.86. Of the five, miR-941 is human-specific with incompletely understood functions, but the other four are prominent in multiple immune system pathways. Three of those four are downregulated in progressed vs. nonprogressed subjects (with weight -1 in a classifier function that increases with risk); all three have also been independently reported as downregulated in monocytes from schizophrenia patients vs. unaffected subjects. Importantly, these findings passed stringent randomization tests that minimized the risk of conclusions arising by chance. Regarding miRNA-miRNA correlations over the three groups, progressed subjects were found to have much weaker miRNA orchestration than nonprogressed or unaffected subjects. If independently verified, the leukocytic miRNA biomarker assay might improve accuracy of psychosis high-risk assessments and eventually help rationalize preventative intervention decisions.


Asunto(s)
Expresión Génica/genética , Predisposición Genética a la Enfermedad/genética , Leucocitos/inmunología , MicroARNs/genética , Trastornos Psicóticos/genética , Trastornos Psicóticos/inmunología , Adolescente , Adulto , Niño , Progresión de la Enfermedad , Regulación hacia Abajo/genética , Femenino , Pruebas Genéticas , Humanos , Fenómenos del Sistema Inmunológico/genética , Estudios Longitudinales , Masculino , Monocitos/inmunología , Medición de Riesgo , Esquizofrenia/genética , Esquizofrenia/inmunología , Trastorno de la Personalidad Esquizotípica/genética , Trastorno de la Personalidad Esquizotípica/inmunología , Adulto Joven
16.
Arch Gen Psychiatry ; 54(3): 279-85, 1997 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-9075469

RESUMEN

BACKGROUND: This study examined how severe stress and depressive symptoms were related to changes in immune measures during a 2-year period in a sample of gay men with human immunodeficiency virus (HIV) infection. These analyses follow up our initial cross-sectional observations that severe stress was correlated with lower levels of natural killer (NK) cells and CD8+ T lymphocytes in these men. METHODS: Data were collected in North Carolina as part of an ongoing, longitudinal study, the Coping in Health and Illness Project. Sixty-six HIV-infected gay men, who were asymptomatic at baseline, were assessed systematically at 6-month intervals. RESULTS: Severe stress and depressive symptoms were independently related to decreases on immune measures from entry to 2-year follow-up, that is, declines in CD8+ T cells and CD56+ and CD16+ NK cell subsets. Subjects most likely to have decreases on these immune measures were those who scored above the median on both stress and depressive symptoms. CONCLUSIONS: Our findings are among the first prospective data showing that stress and depressive symptoms, especially when they occur jointly, are associated with decreased number of NK and CD8+ T lymphocytes in HIV-infected men. Since these immune cells may play a protective role in the progression of HIV infection, our data suggest that stress and depressive symptoms may have clinical implications for the course of this disease.


Asunto(s)
Trastorno Depresivo/epidemiología , Infecciones por VIH/inmunología , Homosexualidad Masculina , Acontecimientos que Cambian la Vida , Subgrupos Linfocitarios/inmunología , Adulto , Linfocitos T CD4-Positivos/inmunología , Linfocitos T CD8-positivos/inmunología , Comorbilidad , Trastorno Depresivo/inmunología , Citometría de Flujo , Infecciones por VIH/epidemiología , Humanos , Células Asesinas Naturales/inmunología , Recuento de Linfocitos , Masculino , Escalas de Valoración Psiquiátrica/estadística & datos numéricos , Índice de Severidad de la Enfermedad , Subgrupos de Linfocitos T/inmunología
17.
Early Interv Psychiatry ; 9(5): 397-405, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-24612563

RESUMEN

AIM: Deficient vitamin D levels are very common among Americans of all ages and ethnicities, but little is known about its prevalence or associated problems among those with schizophrenia. METHODS: Stored plasma from 20 recent onset schizophrenia subjects and 20 matched healthy comparison subjects were analysed for 25 OH vitamin D, and related to measures of symptom severity and neurocognition. RESULTS: There was no significant difference in mean 25 OH vitamin D between the schizophrenia and the healthy comparison subjects (28.2 standard deviation (SD) 12.6 ng mL(-1) vs. 29.9 SD 14.3 ng mL(-1) ), and about half the subjects in each group had insufficient levels (<30 ng mL(-1) ). Among psychosis subjects, greater severity of negative symptoms was correlated with lower vitamin D status (r = -0.55, P = 0.012); the correlations of overall symptom severity and positive symptom severity with 25 OH vitamin D levels approached significance (r = -0.42, P = 0.07 and r = -0.36, P = 0.12, respectively). There was no relationship of vitamin D with depressive symptoms. Among the schizophrenia subjects, lower 25 OH vitamin D levels were associated with more severe overall cognitive deficits (r = 0.56, P = 0.019). CONCLUSION: This study found that lower vitamin D levels in schizophrenia subjects were associated with more severe negative symptoms and overall cognitive deficits. However, the cross-sectional design precludes any conclusions about whether low vitamin D status in fact causes more severe negative symptoms and cognitive impairments. No relationship was found between lower vitamin D levels and depressive symptoms.


Asunto(s)
Trastornos del Conocimiento/complicaciones , Trastornos del Conocimiento/psicología , Esquizofrenia/complicaciones , Psicología del Esquizofrénico , Deficiencia de Vitamina D/complicaciones , Deficiencia de Vitamina D/psicología , Vitamina D/sangre , Estudios de Casos y Controles , Trastornos del Conocimiento/sangre , Estudios Transversales , Depresión/sangre , Depresión/complicaciones , Depresión/psicología , Femenino , Humanos , Masculino , Pruebas Neuropsicológicas , Esquizofrenia/sangre , Esquizofrenia/diagnóstico , Deficiencia de Vitamina D/sangre , Adulto Joven
18.
Biol Psychiatry ; 47(8): 762-6, 2000 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-10773186

RESUMEN

BACKGROUND: Clinical research studies must compensate for measurement error by increasing the number of subjects that are studied, thereby increasing the financial costs of research and exposing greater numbers of subjects to study risks. In this article, we model the relationship between reliability and sample-size requirements and consider the potential tangible cost savings resulting from the decreased number of subjects needed when reliability of raters is improved or multiple ratings are used. METHODS: Standard methods are used to model reliability based on the intraclass correlation coefficient (R) and to perform power calculations. The impact of multiple raters on reliability for a given baseline level of reliability is modeled according to the Spearman Brown formula. RESULTS: Our models demonstrate that meaningful reductions in sample size requirements are gained from improvements in reliability. For example, improving reliability from R = .7 to R = .9 will decreases sample size requirements by 22%. Reliability is improved by training and by the use of the mean of multiple ratings. For example, if the reliability of a single rating is 0.7, the reliability of the mean of two ratings will be 0.8. CONCLUSIONS: The costs to improve reliability either through rater training efforts or use of the mean of multiple ratings is cost effective because of the consequent reduction in number of subjects needed. Efforts to improve reliability and thus reduce subject requirements in a study also may lead to fewer patients bearing the burden of research participation and to a shortening of the duration of studies.


Asunto(s)
Trastornos Mentales/tratamiento farmacológico , Placebos/uso terapéutico , Ensayos Clínicos como Asunto/economía , Ensayos Clínicos como Asunto/estadística & datos numéricos , Humanos , Reproducibilidad de los Resultados
19.
Am J Psychiatry ; 149(11): 1514-20, 1992 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-1415818

RESUMEN

OBJECTIVE: There has been relatively little clinical research on how asymptomatic HIV-positive men cope with the threat of AIDS. The present study was intended to 1) describe the coping strategies used by asymptomatic HIV-positive homosexual men, 2) examine the relationship of coping to dysphoria and self-esteem, and 3) explore how race and social support correlate with coping. METHOD: The study group was composed of 52 asymptomatic HIV-positive homosexual men. A group of 53 HIV-negative homosexual men was used for descriptive comparison. Data on coping, social support, dysphoria, and self-esteem came from self-report measures; depression was also determined by interviews with the Hamilton Rating Scale for Depression. RESULTS: The authors found that 1) subjects primarily coped with the threat of AIDS by adopting a fighting spirit, reframing stress to maximize personal growth, planning a course of action, and seeking social support; 2) more helpless coping, less fighting spirit, and less personal growth were related to dysphoria and poor self-esteem, whereas denial was related to more depression, anger, and helpless coping; 3) satisfaction with one's social support networks and participation in the AIDS community were related to more healthy coping strategies (e.g., fighting spirit, personal growth); and 4) black subjects expressed more denial, more helplessness, and less social support. CONCLUSIONS: These results suggest that health professionals should encourage more adaptive coping strategies, help patients use existing sources of positive social support, and assist patients, particularly black patients, in finding community support networks.


Asunto(s)
Síndrome de Inmunodeficiencia Adquirida , Adaptación Psicológica , Seropositividad para VIH/psicología , Apoyo Social , Síndrome de Inmunodeficiencia Adquirida/psicología , Adulto , Actitud Frente a la Salud , Mecanismos de Defensa , Depresión/psicología , Homosexualidad/psicología , Humanos , Masculino , Inventario de Personalidad , Escalas de Valoración Psiquiátrica , Autoimagen
20.
Am J Psychiatry ; 148(6): 775-9, 1991 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-2035720

RESUMEN

OBJECTIVE: The purpose of this study was to test the hypothesis that heterozygous carriers of the gene for the Wolfram syndrome, who constitute about 1% of the population, are predisposed to significant psychiatric illness. The Wolfram syndrome is an autosomal recessive neurodegenerative syndrome in which 25% of the individuals who are homozygous for the condition have severe psychiatric symptoms that lead to suicide attempts or psychiatric hospitalizations. METHOD: The authors collected questionnaires, death certificates, and hospital records for blood relatives and their spouses in 36 families of individuals with the Wolfram syndrome and compared the proportion of blood relatives who had had psychiatric hospitalizations, had committed suicide, or had self-reported mental illness to the proportion of spouses with the same manifestations. RESULTS: The proportion of blood relatives who had had psychiatric hospitalizations, had committed suicide, or had self-reported mental illness significantly exceeded the proportion of spouses with the same manifestations. CONCLUSIONS: Since heterozygous carriers of the gene for the Wolfram syndrome are 50-fold more common among the blood relatives than among the spouses, the larger proportion among blood relatives is evidence that heterozygous carriers of the gene for the Wolfram syndrome are predisposed to significant psychiatric illness.


Asunto(s)
Familia , Trastornos Mentales/genética , Síndrome de Wolfram/genética , Adulto , Ataxia Telangiectasia/epidemiología , Ataxia Telangiectasia/genética , Femenino , Tamización de Portadores Genéticos , Hospitalización , Humanos , Masculino , Matrimonio , Trastornos Mentales/epidemiología , Persona de Mediana Edad , Inventario de Personalidad , Probabilidad , Factores de Riesgo , Suicidio/estadística & datos numéricos , Encuestas y Cuestionarios , Síndrome de Wolfram/epidemiología
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