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Adolescence is a vulnerable period for mental health. It is not easy to make a precise diagnosis during this period, as young people may present attenuated forms of psychiatric pathology, or on the contrary, a combination of several types of difficulties. Adopting a transdiagnostic and dimensional approach, based on clinical stages, and thus proposing interventions adapted to the severity of symptoms, is pertinent. As emotional dysregulation lies at the heart of many pathologies, it is a prime target for early intervention. Although interventions for adolescents are still underdeveloped, certain approaches derived from cognitive-behavioral therapies and the psychodynamic current have been adapted for adolescents and appear promising.
L'adolescence constitue une période vulnérable pour la santé mentale. Poser un diagnostic précis durant cette période n'est pas aisé car les jeunes peuvent présenter des formes atténuées de pathologies psychiatriques, ou, au contraire, une combinaison de plusieurs types de difficultés. Adopter une approche transdiagnostique et dimensionnelle, en fonction de stades cliniques, et ainsi proposer des interventions adaptées à la sévérité des symptômes est pertinent. La dysrégulation émotionnelle étant au cÅur de nombreuses pathologies, elle est une cible de premier choix pour des interventions précoces. Bien que les interventions pour les adolescents soient encore peu développées, certaines approches issues des thérapies cognitivo-comportementales et du courant psychodynamique ont été adaptées pour les adolescents et semblent prometteuses.
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Terapia Cognitivo-Comportamental , Regulação Emocional , Humanos , Adolescente , Coração , Saúde MentalRESUMO
While several recent studies suggest that approximately 1 in 6 young people in Switzerland are part of the rainbow diversity, a high proportion of health professionals have never had a course on LGBTIQ+ (lesbian, gay, bisexual, transgender, intersex, queer, questioning or other) health. This situation leads to significant gaps in the medical care of LGBTIQ+ persons as well as difficulties in accessing equitable, culturally appropriate and quality care. This article presents the ambitious and novel e-learning project I-CARE (Improving Care and Access for Rainbow Equity) which should contribute, from the end of this year, to filling the current gaps in the undergraduate and continuing education of health professionals.
Alors que plusieurs études récentes suggèrent qu'environ 1 jeune sur 6 fait partie de la diversité arc-en-ciel en Suisse, une proportion élevée des professionnel-les de santé n'a jamais eu de cours sur la santé des personnes LGBTIQ+ (lesbiennes, gays, bisexuelles, transgenres, intersexuées, queers, en questionnement ou autres). Cette situation entraîne d'importantes lacunes dans la prise en charge médicale des personnes LGBTIQ+, ainsi qu'une difficulté d'accès à des soins équitables, culturellement appropriés et de qualité. Cet article présente l'ambitieux et inédit projet de formation par apprentissage en ligne I-CARE (Improving Care and Access for Rainbow Equity) qui devra contribuer, à partir de la fin de cette année, à combler les lacunes actuelles dans la formation prégraduée et continue des professionnel-les de santé.
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Instrução por Computador , Transtornos do Desenvolvimento Sexual , Minorias Sexuais e de Gênero , Pessoas Transgênero , Transexualidade , HumanosRESUMO
Visits to the emergency department are often a difficult time for LGBTQIA+ people, mainly because of the frequent discrimination in healthcare environments and the lack of knowledge of medical and nursing staff. This article begins by presenting some epidemiological features, before discussing specific issues such as contraception and fertility, hormone therapy, sexually transmitted infections, surgical complications, psychiatric pathologies, and traumatology, from the perspective of the emergency physician. Finally, suggestions for further reflection and improvement are proposed.
Les visites aux urgences représentent souvent des moments difficiles pour les personnes LGBTQIA+, principalement en raison des discriminations particulièrement fréquentes dans les milieux de soins et du manque de connaissances du personnel médico-soignant. Cet article présente dans un premier temps quelques chiffres épidémiologiques, avant de discuter des enjeux spécifiques, comme la contraception et la fertilité, l'hormonothérapie, les infections sexuellement transmissibles, les complications opératoires, les pathologies psychiatriques ou la traumatologie, le tout sous le prisme de l'urgentiste. Enfin, des pistes de réflexion et d'amélioration sont proposées.
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Serviço Hospitalar de Emergência , Traumatologia , Humanos , Anticoncepção , Fertilidade , ConhecimentoRESUMO
Mindfulness based interventions (MBI) are widely available to adults. Programs are also offered to children and adolescents. Interventions in school and clinical settings are increasingly being published in scientific literature. In the school context, the effects are promising on psychological health, such as stress, anxiety, depression or externalized behaviours, and on executive functions, attention, and socio-emotional skills. In the clinical context, MBI has a particular effect on stress/anxiety and depression as well as on the key symptoms of Attention Deficit Hyperactivity Disorder. These results are very encouraging, but all meta-analyses and literature reviews nevertheless emphasize the need for studies with robust methodology before proposing MBI on a large scale for this population.
Les interventions basées sur la pleine conscience (MBI) sont de plus en plus proposées aux enfants et aux adolescents et font l'objet de nombreuses publications scientifiques. Dans le contexte scolaire, les effets sont prometteurs sur la santé psychologique, comme le stress, l'anxiété, la dépression ou les comportements externalisés et sur les fonctions exécutives, l'attention, et les compétences socioémotionnelles. Dans le contexte clinique, les MBI ont un effet en particulier sur le stress/l'anxiété et la dépression ainsi que sur les symptômes clés du trouble du déficit d'attention avec hyperactivité. Ces résultats sont très encourageants mais toutes les méta-analyses et les revues de la littérature soulignent néanmoins la nécessité de faire des études à la méthodologie robuste avant de proposer des MBI à large échelle.
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Ansiedade/terapia , Transtorno do Deficit de Atenção com Hiperatividade/terapia , Depressão/terapia , Saúde Mental , Atenção Plena , Adolescente , Criança , Emoções , HumanosRESUMO
Transgender, non-binary and questioning teenagers are increasingly visible. However, they face barriers in accessing appropriate care that meet their needs, both specific and regarding their general health. Primary care physicians increasingly see them in consultations but often lack elements of communication and recent knowledge that is needed to accompany them and their close ones in their -individual trajectories. This article aims to answer this need and provides a synthesis about recent evidence and suggested communication approaches for primary care physicians, who play a central role for the health of all patients.
Les adolescents transgenres, non binaires ou en questionnement sont de plus en plus visibles et font face à de nombreux obstacles pour accéder à des soins appropriés, tant pour leurs besoins de santé spécifiques que généraux. Les médecins de premier recours les rencontrent au cabinet et peuvent manquer d'éléments de communication et de connaissances spécifiques récentes pour mener la consultation et accompagner ces personnes et leurs proches dans leurs trajectoires individuelles. Cet article propose une synthèse des éléments et des ressources utiles pour le médecin de premier recours, dont le rôle est central pour la santé de tous les patients.
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Comunicação , Atenção Primária à Saúde/métodos , Encaminhamento e Consulta , Pessoas Transgênero , Transexualidade , Adolescente , HumanosRESUMO
Parents are often reluctant to discuss sexuality and romantic relationships with their teenagers. However, these discussions can have a strong impact on their children's health. Care providers can act as a reliable source of information to support parents in this task. Through repeated short interactions with their child over their adolescence, parents can cover most topics related to sexuality, based on teenagers' questions and the situations that they face (e.g. LGBT bullying at school). This article summarizes current best practice on how to facilitate parental dialogue with adolescents about sexuality and offer care providers guidance in transmitting this information to parents.
Les parents sont souvent réticents à parler de sexualité et de relations amoureuses avec leurs adolescents. Cependant, ces discussions ont un rôle majeur pour la santé de leurs enfants. Les professionnels de santé sont une source d'informations fiable et de soutien pour les parents dans cette démarche. De nombreuses interactions courtes durant les années de l'adolescence, entre parents et adolescents, basées sur des questions et des situations rencontrées permettent de couvrir les nombreuses thématiques liées à la sexualité. Cet article propose une aide pour les professionnels de santé afin d'informer les parents et les encourager à ouvrir le dialogue avec leurs enfants. Il résume les meilleures pratiques pour favoriser la communication avec des adolescents concernant la sexualité.
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Observational studies almost always have bias because prognostic factors are unequally distributed between patients exposed or not exposed to an intervention. The standard approach to dealing with this problem is adjusted or stratified analysis. Its principle is to use measurement of risk factors to create prognostically homogeneous groups and to combine effect estimates across groups.The purpose of this Users' Guide is to introduce readers to fundamental concepts underlying adjustment as a way of dealing with prognostic imbalance and to the basic principles and relative trustworthiness of various adjustment strategies.One alternative to the standard approach is propensity analysis, in which groups are matched according to the likelihood of membership in exposed or unexposed groups. Propensity methods can deal with multiple prognostic factors, even if there are relatively few patients having outcome events. However, propensity methods do not address other limitations of traditional adjustment: investigators may not have measured all relevant prognostic factors (or not accurately), and unknown factors may bias the results.A second approach, instrumental variable analysis, relies on identifying a variable associated with the likelihood of receiving the intervention but not associated with any prognostic factor or with the outcome (other than through the intervention); this could mimic randomization. However, as with assumptions of other adjustment approaches, it is never certain if an instrumental variable analysis eliminates bias.Although all these approaches can reduce the risk of bias in observational studies, none replace the balance of both known and unknown prognostic factors offered by randomization.
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Análise de Variância , Estudos Observacionais como Assunto/estatística & dados numéricos , Pontuação de Propensão , Ensaios Clínicos Controlados Aleatórios como Assunto/estatística & dados numéricos , Risco Ajustado/métodos , Medição de Risco/métodos , Fatores Etários , Viés , Cateterismo Cardíaco/efeitos adversos , Estudos de Coortes , Humanos , Infarto do Miocárdio/terapia , Prognóstico , Distribuição Aleatória , Análise de Regressão , Risco Ajustado/estatística & dados numéricos , Fatores de Risco , Viés de SeleçãoRESUMO
Background: The increasing resistance of Enterobacterales to third-generation cephalosporins and carbapenems in sub-Saharan Africa (SSA) is a major public health concern. We did a systematic review and meta-analysis of studies to estimate the carriage prevalence of Enterobacterales not susceptible to third-generation cephalosporins or carbapenems among paediatric populations in SSA. Methods: We performed a systematic literature review and meta-analysis of cross-sectional and cohort studies to estimate the prevalence of childhood (0-18 years old) carriage of extended-spectrum cephalosporin-resistant Enterobacterales (ESCR-E) or carbapenem-resistant Enterobacterales (CRE) in SSA. Medline, EMBASE and the Cochrane Library were searched for studies published from 1 January 2005 to 1 June 2022. Studies with <10 occurrences per bacteria, case reports, and meta-analyses were excluded. Quality and risk of bias were assessed using the Newcastle-Ottawa scale. Meta-analyses of prevalences and odds ratios were calculated using generalised linear mixed-effects models. Heterogeneity was assessed using I2 statistics. The protocol is available on PROSPERO (CRD42021260157). Findings: Of 1111 studies examined, 40 met our inclusion criteria, reporting on the carriage prevalence of Enterobacterales in 9408 children. The pooled carriage prevalence of ESCR-E was 32.2% (95% CI: 25.2%-40.2%). Between-study heterogeneity was high (I2 = 96%). The main sources of bias pertained to participant selection and the heterogeneity of the microbiological specimens. Carriage proportions were higher among sick children than healthy ones (35.7% vs 16.9%). The pooled proportion of nosocomial acquisition was 53.8% (95% CI: 32.1%-74.1%) among the 922 children without ESCR-E carriage at hospital admission. The pooled odds ratio of ESCR-E carriage after antibiotic treatment within the previous 3 months was 3.20 (95% CI: 2.10-4.88). The proportion of pooled carbapenem-resistant for Enterobacterales was 3.6% (95% CI: 0.7%-16.4%). Interpretation: This study suggests that ESCR-E carriage among children in SSA is frequent. Microbiology capacity and infection control must be scaled-up to reduce the spread of those multidrug-resistant microorganisms. Funding: There was no funding source for this study.
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Adolescence is marked by the maturation of systems involved in emotional regulation and by an increased risk for internalizing disorders (anxiety/depression), especially in females. Hypothalamic-pituitary-adrenal (HPA)-axis function and redox homeostasis (balance between reactive oxygen species and antioxidants) have both been associated with internalizing disorders and may represent critical factors for the development of brain networks of emotional regulation. However, sex-specific interactions between these factors and internalizing symptoms and their link with brain maturation remain unexplored. We investigated in a cohort of adolescents aged 13-15 from the general population (n = 69) whether sex-differences in internalizing symptoms were associated with the glutathione (GSH)-redox cycle homeostasis and HPA-axis function and if these parameters were associated with brain white matter microstructure development. Female adolescents displayed higher levels of internalizing symptoms, GSH-peroxidase (GPx) activity and cortisol/11-deoxycortisol ratio than males. There was a strong correlation between GPx and GSH-reductase (Gred) activities in females only. The cortisol/11-deoxycortisol ratio, related to the HPA-axis activity, was associated with internalizing symptoms in both sexes, whereas GPx activity was associated with internalizing symptoms in females specifically. The cortisol/11-deoxycortisol ratio mediated sex-differences in internalizing symptoms and the association between anxiety and GPx activity in females specifically. In females, GPx activity was positively associated with generalized fractional anisotropy in widespread white matter brain regions. We found that higher levels of internalizing symptoms in female adolescents than in males relate to sex-differences in HPA-axis function. In females, our results suggest an important interplay between HPA-axis function and GSH-homeostasis, a parameter strongly associated with brain white matter microstructure.
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Hidrocortisona , Substância Branca , Humanos , Masculino , Adolescente , Feminino , Substância Branca/diagnóstico por imagem , Cortodoxona , Encéfalo/diagnóstico por imagem , Oxirredução , Sistema Hipotálamo-Hipofisário/fisiologia , Sistema Hipófise-Suprarrenal/fisiologia , Antioxidantes , Estresse PsicológicoRESUMO
Background: The burden of antimicrobial resistance (AMR) has been estimated to be the highest in sub-Saharan Africa (SSA). The current study estimated the proportion of drug-resistant Enterobacterales causing infections in SSA children. Methods: We searched MEDLINE/PubMed, Embase and the Cochrane Library to identify retrospective and prospective studies published from 01/01/2005 to 01/06/2022 reporting AMR of Enterobacterales causing infections in sub-Saharan children (0-18 years old). Studies were excluded if they had unclear documentation of antimicrobial susceptibility testing methods or fewer than ten observations per bacteria. Data extraction and quality appraisal were conducted by two authors independently. The primary outcome was the proportion of Enterobacterales resistant to antibiotics commonly used in paediatrics. Proportions were combined across studies using mixed-effects logistic regression models per bacteria and per antibiotic. Between-study heterogeneity was assessed using the I2 statistic. The protocol was registered with PROSPERO (CRD42021260157). Findings: After screening 1111 records, 122 relevant studies were included, providing data on more than 30,000 blood, urine and stool isolates. Escherichia coli and Klebsiella spp. were the predominant species, both presenting high proportions of resistance to third-generation cephalosporins, especially in blood cultures: 40.6% (95% CI: 27.7%-55%; I2: 85.7%, number of isolates (n): 1032) and 84.9% (72.8%-92.2%; I2: 94.1%, n: 2067), respectively. High proportions of resistance to other commonly used antibiotics were also observed. E. coli had high proportions of resistance, especially for ampicillin (92.5%; 95% CI: 76.4%-97.9%; I2: 89.8%, n: 888) and gentamicin (42.7%; 95% CI: 30%-56.5%; I2: 71.9%, n: 968). Gentamicin-resistant Klebsiella spp. were also frequently reported (77.6%; 95% CI: 65.5%-86.3%; I2: 91.6%, n: 1886). Interpretation: High proportions of resistance to antibiotics commonly used for empirical treatment of infectious syndromes were found for Enterobacterales in sub-Saharan children. There is a critical need to better identify local patterns of AMR to inform and update clinical guidelines for better treatment outcomes. Funding: No funding was received.
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BACKGROUND: Clinicians perform searches in PubMed daily, but retrieving relevant studies is challenging due to the rapid expansion of medical knowledge. Little is known about the performance of search strategies when they are applied to answer specific clinical questions. OBJECTIVE: To compare the performance of 15 PubMed search strategies in retrieving relevant clinical trials on therapeutic interventions. METHODS: We used Cochrane systematic reviews to identify relevant trials for 30 clinical questions. Search terms were extracted from the abstract using a predefined procedure based on the population, interventions, comparison, outcomes (PICO) framework and combined into queries. We tested 15 search strategies that varied in their query (PIC or PICO), use of PubMed's Clinical Queries therapeutic filters (broad or narrow), search limits, and PubMed links to related articles. We assessed sensitivity (recall) and positive predictive value (precision) of each strategy on the first 2 PubMed pages (40 articles) and on the complete search output. RESULTS: The performance of the search strategies varied widely according to the clinical question. Unfiltered searches and those using the broad filter of Clinical Queries produced large outputs and retrieved few relevant articles within the first 2 pages, resulting in a median sensitivity of only 10%-25%. In contrast, all searches using the narrow filter performed significantly better, with a median sensitivity of about 50% (all P < .001 compared with unfiltered queries) and positive predictive values of 20%-30% (P < .001 compared with unfiltered queries). This benefit was consistent for most clinical questions. Searches based on related articles retrieved about a third of the relevant studies. CONCLUSIONS: The Clinical Queries narrow filter, along with well-formulated queries based on the PICO framework, provided the greatest aid in retrieving relevant clinical trials within the 2 first PubMed pages. These results can help clinicians apply effective strategies to answer their questions at the point of care.
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Armazenamento e Recuperação da Informação , PubMedRESUMO
AIM: Adolescence is a period of vulnerability to stress. Increased anxiety during this period has been associated with the later development of mental disorders, hence the growing interest for interventions that could decrease stress reactivity and improve cognitive control in adolescents. Mindfulness-based interventions have demonstrated their efficacy on stress reactivity and anxiety in adults, but evidence is lacking in youth. METHODS: The Mindfulteen Study is a 3-year longitudinal cohort with a nested randomized controlled trial examining the effectiveness of mindfulness-based interventions for adolescents. Young adolescents from the general population, aged between 13 and 15 years old, with no history of current mental health disorder (apart from past mood disorders or current anxiety disorders) are included and stratified into low or high anxiety based on trait anxiety scores before being randomized to early or late 8-week intervention groups. Primary outcomes are based on neuroimaging data (i.e., structural and functional measures in the cortico-limbic network) while secondary outcomes are psychological (i.e., anxiety and stress-associated dimensions) and biological (i.e., cortisol, inflammatory and redox markers). Assessments are performed at baseline, immediately after intervention or waiting time and after 18 months of intervention. CONCLUSION: To the best of our knowledge, this is the first randomized controlled trail examining the effect of a mindfulness-based intervention in young adolescents from the general population based on the measurement and analyses of psychological, neuroimaging and biological data.
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Atenção Plena , Adolescente , Ansiedade/psicologia , Ansiedade/terapia , Humanos , Hidrocortisona , Atenção Plena/métodos , Neuroimagem , Ensaios Clínicos Controlados Aleatórios como AssuntoRESUMO
Very preterm (VPT) children and adolescents show executive, behavioural and socio-emotional difficulties that persists into adulthood. This study aims to assess the effectiveness of a mindfulness-based intervention (MBI) in improving these competencies in VPT young adolescents using a randomised controlled trial design. 56 young adolescents aged 10-14 years, born before 32 gestational weeks, were randomly assigned to an "intervention" or a "waiting" group and completed an 8-week MBI in a cross-over design. Executive, behavioural and socio-emotional competencies were assessed at three different time points via parent and self-reported questionnaires, neuropsychological testing and computerised tasks. The data were analysed using an intention-to-treat approach with linear regression modelling. Our findings show a beneficial effect of MBI on executive, behavioural and socio-emotional competencies in VPT young adolescents measured by parent questionnaires. Increased executive competencies were also observed on computerised task with enhanced speed of processing after MBI. Two subgroups of participants were created based on measures of prematurity, which revealed increased long-term benefits in the moderate-risk that were not observed in the high-risk subgroups of VPT young adolescents. MBI seems a valuable tool for reducing detrimental consequences of prematurity in young adolescents, especially regarding executive, behavioural and socio-emotional difficulties.Clinical Trial Registration ClinicalTrials, NCT04638101. Registered 20 November 2020-Retrospectively registered, https://clinicaltrials.gov/show/NCT04638101 .
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Emoções , Função Executiva , Lactente Extremamente Prematuro , Atenção Plena , Nascimento Prematuro/epidemiologia , Comportamento Social , Adolescente , Comportamento do Adolescente/psicologia , Desenvolvimento do Adolescente , Criança , Comportamento Infantil/psicologia , Desenvolvimento Infantil , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Atenção Plena/métodos , Nascimento Prematuro/psicologiaRESUMO
BACKGROUND: Very preterm (VPT) children and adolescents show executive, behavioural and socio-emotional difficulties that persist into adulthood. Despite the promising role of mindfulness-based intervention (MBI) in improving theses competences in children and adolescents, the effectiveness of an MBI has not been assessed in a VPT population so far. AIMS: To describe the protocol and to evaluate the feasibility and acceptability of a clinical trial on an 8-week MBI program to enhance executive and socio-emotional competences in a cohort of VPT young adolescents. STUDY DESIGN: A randomised controlled trial (RCT) and a pre-post intervention designs. PARTICIPANTS: 164 VPT young adolescents from 10 to 14 years old, born before 32 gestational weeks, without major intellectual, sensory or physical impairments, and attending mainstream school, were invited to participate in an 8-week MBI program. OUTCOME MEASURES: Completion rate of the study was recorded. Acceptability, satisfaction and attendance measures of the MBI were collected using self-reported questionnaires and registration of attendance. RESULTS: Of the 63 participants who were enrolled in the study (38.2% of families invited to participate), 52 (82.5%) completed all assessments. Acceptability was high as shown by the high attendance rate in the sessions and the feedback evaluation questionnaire. CONCLUSIONS: Our findings suggest that an MBI is feasible to implement and show a high acceptability among participants. The use of an RCT design in our study constitutes the gold standard for testing the efficacy of such intervention in VPT young adolescents. If effective, the MBI program could potentially be a valuable tool for improving executive and socio-emotional competences in the vulnerable VPT population. TRIAL REGISTRATION: ClinicalTrials, NCT04638101. Registered 19 November 2020 - retrospectively registered, https://clinicaltrials.gov/show/NCT04638101.
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Atenção Plena , Adolescente , Criança , Emoções , Estudos de Viabilidade , Humanos , Lactente Extremamente Prematuro , Recém-Nascido , Atenção Plena/métodos , Ensaios Clínicos Controlados Aleatórios como Assunto , Inquéritos e QuestionáriosRESUMO
CLINICAL QUESTION: What is the role of medical cannabis or cannabinoids for people living with chronic pain due to cancer or non-cancer causes? CURRENT PRACTICE: Chronic pain is common and distressing and associated with considerable socioeconomic burden globally. Medical cannabis is increasingly used to manage chronic pain, particularly in jurisdictions that have enacted policies to reduce use of opioids; however, existing guideline recommendations are inconsistent, and cannabis remains illegal for therapeutic use in many countries. RECOMMENDATION: The guideline expert panel issued a weak recommendation to offer a trial of non-inhaled medical cannabis or cannabinoids, in addition to standard care and management (if not sufficient), for people living with chronic cancer or non-cancer pain. HOW THIS GUIDELINE WAS CREATED: An international guideline development panel including patients, clinicians with content expertise, and methodologists produced this recommendation in adherence with standards for trustworthy guidelines using the GRADE approach. The MAGIC Evidence Ecosystem Foundation (MAGIC) provided methodological support. The panel applied an individual patient perspective. THE EVIDENCE: This recommendation is informed by a linked series of four systematic reviews summarising the current body of evidence for benefits and harms, as well as patient values and preferences, regarding medical cannabis or cannabinoids for chronic pain. UNDERSTANDING THE RECOMMENDATION: The recommendation is weak because of the close balance between benefits and harms of medical cannabis for chronic pain. It reflects a high value placed on small to very small improvements in self reported pain intensity, physical functioning, and sleep quality, and willingness to accept a small to modest risk of mostly self limited and transient harms. Shared decision making is required to ensure patients make choices that reflect their values and personal context. Further research is warranted and may alter this recommendation.
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Canabinoides/administração & dosagem , Dor Crônica/tratamento farmacológico , Maconha Medicinal/administração & dosagem , Adolescente , Adulto , Canabinoides/efeitos adversos , Criança , Humanos , Maconha Medicinal/efeitos adversos , Adulto JovemRESUMO
OBJECTIVES: Lesbian, gay, bisexual, and transgender (LGBT) adolescents have specific health care needs and are susceptible to health care disparities. Lack of skills and knowledge on the part of health care providers have a negative effect on their access to care and health outcomes. This study 1) explores the knowledge and attitudes of medical students regarding LGBT people, and 2) assesses the impact of a one-hour lecture targeting adolescent LGBT health needs. METHODS: Fourth-year medical students attended a compulsory one-hour lecture on sexual orientation and gender identity development in adolescence, highlighting health issues. We created a questionnaire with items to elicit students' knowledge and attitudes about LGBT health issues. Students were invited to complete this questionnaire online anonymously one week before the lecture and one month after the lecture. RESULTS: Out of a total of 157 students, 107 (68.2%) responded to the pre-intervention questionnaire and 96 (61.1%) to the post-intervention questionnaire. A significant proportion-13.7% of all respondents-identified as LGBT or questioning. Our results show that most medical students already show favorable attitudes towards LGBT people and a certain degree of knowledge of LGBT health needs. They demonstrated a large and significant increase in knowledge of LGBT health issues one month after the lecture. DISCUSSION: A single one-hour lecture on sexual orientation and LGBT health issues may increase knowledge among medical students. Medical students and professionals should receive such training to increase their knowledge about LGBT patients as it, together with favorable attitudes, has the potential to improve health outcomes among this vulnerable population.