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47 papers
Our findings suggest that geographic location plays a limited role in the reasons for the large variability of ADHD/HD prevalence estimates worldwide. Instead, this variability seems to be explained primarily by the methodological characteristics of studies.
This study reviewed systematic reviews to measure death risks in major mental disorders. The authors screened 407 reviews and found 20 that reported mortality risks for 20 different disorders, covering over 1.7 million patients and more than a quarter of a million deaths. Every disorder showed higher all-cause death rates…
This systematic review looked at studies from 2000–2018 that measured how common eating disorders are. The authors followed PRISMA rules and included 94 studies with accurate diagnoses and 27 studies with broader categories. Across the accurate-diagnosis studies, women had higher rates than men. Point prevalence estimates rose over time from…
This umbrella review looked at the best existing reviews and large studies to see if depression is linked to low serotonin or low serotonin activity. Across measures of serotonin in fluids, receptor and transporter studies, tryptophan depletion experiments, and large genetic studies, the evidence was mixed or absent. The authors…
This umbrella review pooled evidence from 97 systematic reviews (1,039 randomized trials, 128,119 participants) to examine whether physical activity affects symptoms of depression, anxiety and psychological distress in adults. Overall, physical activity produced medium-sized reductions in symptoms (median effect size for depression = -0.43, for anxiety = -0.42; distress effect…
The authors pooled results from 61 cross-sectional studies to estimate how common ADHD is in children and adolescents worldwide. They found a pooled prevalence of 7.6% (95% CI 6.1–9.4%) in children aged 3–12 (from 96,907 children) and 5.6% (95% CI 4.8–7%) in adolescents aged 12–18. Prevalence estimates varied by age…
This systematic review looked at research on social media and mental health. The authors state that social media are responsible for making mental health problems worse. They searched 50 papers and, after applying selection rules, included 16 studies. The final papers were checked for quality and included a mix of…
This review collected studies of tai chi up to May 31, 2013 and found that many trials reported benefits for mood and psychological well-being. The authors included 37 randomized controlled trials and 5 quasi-experimental studies from English and Chinese databases. A small pooled analysis of three randomized trials that measured…
The article describes “high functioning anxiety” as a way some people with anxiety symptoms talk about their experience, not as an official medical diagnosis. It says people can look successful and cope outwardly while having common anxiety symptoms, and that diagnosis can be hard because the symptom effects may be…
This 2019 systematic review looked at human studies of medicinal cannabis and cannabis-derived isolates for major psychiatric disorders. The authors found that the evidence is very new and limited, so it is too early to recommend cannabis medicines for psychiatric conditions. Some small or isolated studies suggest benefits for a…
The CANMAT 2023 update gives doctors clear, up-to-date advice for treating adults with major depressive disorder. It puts evidence into a practical, clinician-friendly format. The update says treatment should be a team effort between patients and clinicians, be tailored to each person, and follow a planned, systematic process with regular…
This review combined results from 10 intervention studies to see if physical activity programs change cortisol (a stress hormone) and sleep in adults. The pooled results found lower cortisol after activity programs and some improvement in sleep quality. The authors say the evidence is moderate for cortisol and low for…
