Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 6 de 6
Mais filtros

Base de dados
Intervalo de ano de publicação
Artigo em Inglês | MEDLINE | ID: mdl-31682918


OBJECTIVE: To compare antidepressant-related adverse events (AEs), suicidality and AE-related discontinuation in double-blind, placebo-controlled trials of pediatric patients with OCD and anxiety disorders treated with selective serotonin reuptake inhibitors (SSRIs) or serotonin-norepinephrine reuptake inhibitors (SNRIs). METHOD: MEDLINE, PubMed, Web of Science, PsycINFO and Embase were searched for peer-reviewed, English-language articles from inception through March 1, 2019. We identified prospective, randomized, SSRI and SNRI studies in patients <18 years of age with OCD, generalized, separation or social anxiety disorders. AE rates were extracted and antidepressant-placebo differences examined using Bayesian hierarchical models (BHM) then posterior estimates of relative risk (RR) was determined for each AE by medication class and disorder. RESULTS: Data were included from 18 trials (2631 patients) and 7 medications (16 SSRI and 4 SNRI trials). Compared to placebo, SSRIs were associated with a greater likelihood of AE-related discontinuation (RR: 3.59, CrI: 0.019 to 0.067, p=0.0003), activation (RR: 2.39, CrI: 0.048 to 0.125, p=0.003), sedation (RR: 1.94, CrI: 0.035 to 0.157, p=0.002), insomnia (RR: 1.93, CrI: 0.040 to 0.149, p=0.001), abdominal pain (RR: 1.53, Credible Interval [CrI]: 0.032 to 0.164, p=0.005) and headache (RR: 1.24, CrI: 0.003 to 0.139, p=0.04). Activation was more common with SSRI (vs. SNRIs, RR: 1.32, CrI: 0.018 to 0.114, p=0.007). Neither SSRIs nor SNRIs were associated with treatment-emergent suicidality. CONCLUSION: In pediatric OCD and anxiety disorders, SSRIs (compared to placebo) are associated with distinct adverse events (AEs) and greater AE-related discontinuation, although their tolerability does not differ between anxiety disorders and OCD. Compared to SNRIs, SSRIs are more likely to produce activation. Class-related AEs are important for clinicians to consider, particularly in light of data suggesting differences in class-related efficacy. While SSRIs are superior to SNRIs and the treatment of choice for anxiety, for youth who become activated on SSRIs, SNRIs might represent a good second choice given their reported efficacy and lower risk of activation.

J Child Adolesc Psychopharmacol ; 29(4): 250-255, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30810350


Objective: To guide clinicians in selecting the "next line" selective serotonin reuptake inhibitor (SSRI) for adolescents with treatment-resistant major depressive disorder, we sought to compare response rates among SSRIs in the Treatment of SSRI-Resistant Depression in Adolescents (TORDIA) study and to jointly model tolerability and efficacy for the specific SSRI comparisons. Methods: Efficacy and tolerability data for paroxetine, citalopram, and fluoxetine were extracted from the TORDIA study. Using a joint bivariate normal likelihood for response and tolerability (based on the maximum implied variance from the 95% credible intervals previously reported for the three SSRIs), a Monte Carlo pseudorandom sample (100,000 draws) was obtained, from which credible intervals, means, posterior tail probabilities, etc. were determined. Joint null hypotheses of no difference in efficacy and tolerability were then evaluated with regard to superiority of each SSRI over the others. Results: No significant differences in response were observed for citalopram compared with fluoxetine (p = 0.247) or for fluoxetine compared with paroxetine (p = 0.110), although citalopram trended toward being superior to paroxetine (mean difference: 0.2, p = 0.055). For efficacy-tolerability models, citalopram and fluoxetine were superior to paroxetine (p = 0.029 and p = 0.022, respectively) but did not differ between each other (p = 0.146). Conclusions: Joint efficacy-tolerability models suggest that citalopram and fluoxetine were statistically significantly superior to paroxetine while citalopram trended toward superiority over paroxetine in the efficacy model. These findings provide a more granular and practical evidence base for clinicians faced with treatment sequencing decisions in adolescents with SSRI-resistant depression.

J Am Acad Child Adolesc Psychiatry ; 57(4): 235-244.e2, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29588049


OBJECTIVE: To determine the trajectory and magnitude of antidepressant response as well as the effect of antidepressant class and dose on symptomatic improvement in pediatric anxiety disorders. METHOD: Weekly symptom severity data were extracted from randomized, parallel group, placebo-controlled trials of selective serotonin reuptake inhibitors (SSRIs) and selective serotonin-norepinephrine reuptake inhibitors (SNRIs) in pediatric anxiety disorders. Treatment response was modeled for the standardized change in continuous measures of anxiety using Bayesian updating. Posterior distributions for each study served as informative conjugate prior to distributions update subsequent study posteriors. Change in symptom severity was evaluated as a function of time, class and, for SSRIs, standardized dose. RESULTS: Data from 9 trials (SSRIs: n = 5; SNRIs, n = 4) evaluating 7 medications in 1,673 youth were included. In the logarithmic model of treatment response, statistically, but not clinically, significant treatment effects emerged within 2 weeks of beginning treatment (standardized medication-placebo difference = -0.054, credible interval [CI] = -0.076 to -0.032, p = .005, approximate Cohen's d ≤ 0.2) and by week 6, clinically significant differences emerged (standardized medication-placebo difference = -0.120, CI = -0.142 to -0.097, p = .001, approximate Cohen's d = 0.44). Compared to SNRIs, SSRIs resulted in significantly greater improvement by the second week of treatment (p = .0268), and this advantage remained statistically significant through week 12 (all p values <.03). Improvement occurred earlier with high-dose SSRI treatment (week 2, p = .002) compared to low-dose treatment (week 10, p = .025), but SSRI dose did not have an impact on overall response trajectory (p > .18 for weeks 1-12). CONCLUSIONS: In pediatric patients with generalized, separation, and/or social anxiety disorders, antidepressant-related improvement occurred early in the course of treatment, and SSRIs were associated with more rapid and greater improvement compared to SNRIs.

Transtornos de Ansiedade/tratamento farmacológico , Inibidores de Captação de Serotonina/administração & dosagem , Inibidores de Captação de Serotonina/uso terapêutico , Inibidores da Recaptação de Serotonina e Norepinefrina/administração & dosagem , Inibidores da Recaptação de Serotonina e Norepinefrina/uso terapêutico , Adolescente , Humanos , Inibidores de Captação de Serotonina/farmacologia , Inibidores da Recaptação de Serotonina e Norepinefrina/farmacologia
J Child Adolesc Psychopharmacol ; 28(1): 2-9, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-28846022


OBJECTIVES: An increasing number of abandoned clinical trials have forestalled efforts to advance the evidence base for the treatment of mood and anxiety disorders in children and adolescents. With this in mind, we sought to present and validate a Bayesian approach for the reanalysis of summary data in abandoned clinical trials and to review and re-evaluate available pharmacokinetic, tolerability, and efficacy data from two large, randomized controlled trials of buspirone in pediatric patients with generalized anxiety disorder (GAD). METHODS: Prospective, randomized, parallel-group controlled trials of buspirone in pediatric patients with GAD as well as associated pharmacokinetic studies were identified and data were extracted. In addition to descriptive statistics, marginal posterior densities for each variable of interest were determined and a Monte Carlo pseudosample was generated with random draws obtained from the Student's t-distribution to assess, with inferential statistics, differences in variables of interest. RESULTS: Buspirone was evaluated in one flexibly dosed (N = 227) and one fixed-dose (N = 341) trial in children and adolescents aged 6-17 years with a primary diagnosis of GAD. With regard to improvement in the sum of the Columbia Schedule for Affective Disorders and Schizophrenia GAD items, buspirone did not separate from placebo in the fixed-dose trial at low (95% CI: -0.78 to 2.39, p = 0.32) or high dose (95% CI: -0.87 to 1.87, p = 0.47) nor did it separate from placebo in the flexibly dosed study (95% CI: -0.3 to 1.9, p = 0.15). Drop out as a result of a treatment-emergent adverse event was significantly greater in buspirone-treated patients compared to placebo (p = 0.011). Side effects were consistent with the known profile of buspirone with lightheadedness occurring more frequently in buspirone-treated patients (p < 0.001). CONCLUSIONS: Buspirone is well tolerated in pediatric patients with GAD, although two randomized controlled trials were underpowered to detect small effect sizes (Cohen's d < 0.15). Finally, Bayesian approaches may facilitate re-examination of data from abandoned clinical trials.

Ansiolíticos/uso terapêutico , Transtornos de Ansiedade/tratamento farmacológico , Buspirona/uso terapêutico , Adolescente , Ansiolíticos/efeitos adversos , Teorema de Bayes , Buspirona/efeitos adversos , Criança , Humanos , Pacientes Desistentes do Tratamento/estatística & dados numéricos , Ensaios Clínicos Controlados Aleatórios como Assunto/estatística & dados numéricos
Brain Behav Immun ; 67: 36-41, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-28736033


BACKGROUND: While disruption of acid-base homeostasis has been pathoetiologically implicated in panic disorder (PD), the mechanism by which pH imbalance is translated to panic pathophysiology is poorly understood. Recently, in a translational rodent model of PD, we reported a role of microglial acid sensing G-protein coupled receptor, T cell death associated gene-8 (TDAG8) in panic-associated behavior and physiology. However, the clinical validity of the TDAG8 receptor has not been investigated. OBJECTIVE: To assess TDAG8 in PD, we evaluated TDAG8 receptor expression in adolescents and young adults with PD and healthy comparison subjects. METHODS: Relative expression of TDAG8 mRNA was determined in peripheral blood mononuclear cells from patients with PD, and compared to expression in healthy subjects. Linear models were utilized to evaluate the relationship between TDAG8 expression and panic disorder symptom severity scale (PDSS) score as well as other potential explanatory variables (e.g., CRP, body mass index, sex, age). Models were refined based on the estimated parameter significance, evidence of omitted variable bias and Bayesian/Akaike information criteria. RESULTS: Relative to healthy comparison subjects (n=17), expression of TDAG8 mRNA was significantly increased in patients with PD (n=15) (1.60±0.65 vs. 1.01±0.50, p=0.008). TDAG8 mRNA expression predicted PD symptom severity in a fixed effect model incorporating age and sex (p=0.003). CONCLUSIONS: Collectively, our results suggest greater TDAG8 expression in patients with PD compared to healthy subjects, and directly link TDAG8 expression and the severity of the PD symptoms. Further investigation of the TDAG8 receptor in panic pathophysiology is warranted.

Transtorno de Pânico/metabolismo , Receptores Acoplados a Proteínas-G/metabolismo , Adolescente , Adulto , Proteína C-Reativa/metabolismo , Feminino , Humanos , Masculino , Projetos Piloto , RNA Mensageiro/metabolismo , Índice de Gravidade de Doença , Adulto Jovem
J Child Adolesc Psychopharmacol ; 27(6): 501-508, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28384010


OBJECTIVES: The aim of this study is to identify predictors of pill placebo response and to characterize the temporal course of pill placebo response in anxious youth. METHODS: Data from placebo-treated patients (N = 76) in the Child/Adolescent Anxiety Multimodal Study (CAMS), a multisite, randomized controlled trial that examined the efficacy of cognitive-behavioral therapy, sertraline, their combination, and placebo for the treatment of separation, generalized, and social anxiety disorders, were evaluated. Multiple linear regression models identified features associated with placebo response and models were confirmed with leave-one-out cross-validation. The likelihood of improvement in patients receiving pill placebo-over time-relative to improvement associated with active treatment was determined using probabilistic Bayesian analyses. RESULTS: Based on a categorical definition of response (Clinical Global Impressions-Improvement Scale score ≤2), nonresponders (n = 48), and pill placebo responders (n = 18) did not differ in age (p = 0.217), sex (p = 0.980), race (p = 0.743), or primary diagnosis (all ps > 0.659). In terms of change in anxiety symptoms, separation anxiety disorder and treatment expectation were associated with the degree of pill placebo response. Greater probability of placebo-related anxiety symptom improvement was observed early in the course of treatment (baseline to week 4, p < 0.0001). No significant change in the probability of placebo-related improvement was observed after week 4 (weeks 4-8, p = 0.07; weeks 8-12, p = 0.85), whereas the probability of improvement, in general, significantly increased week over week with active treatment. CONCLUSIONS: Pill placebo-related improvement occurs early in the course of treatment and both clinical factors and expectation predict this improvement. Additionally, probabilistic approaches may refine our understanding and prediction of pill placebo response.

Transtornos de Ansiedade/tratamento farmacológico , Transtornos de Ansiedade/psicologia , Efeito Placebo , Adolescente , Teorema de Bayes , Criança , Terapia Cognitivo-Comportamental , Terapia Combinada , Feminino , Humanos , Masculino , Inibidores de Captação de Serotonina/uso terapêutico , Sertralina/uso terapêutico