prevalence

Published research on prevalence.

AnxietyOct 23, 2026

Anxiety Rates Fell in China, but Cases Are Projected to Rise

China's age-standardized anxiety burden fell 1.2% a year after 2000, yet modeled Global Burden of Disease estimates project 22% more anxiety cases by 2040, with more of the burden in middle …

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PsychiatryOct 21, 2026

Treatment-Resistant Schizophrenia Affects 28.6% of Assessed Inpatients in Japan

A 2026 nationwide study in Japan found that 28.6% of hospitalized patients with schizophrenia who were checked for treatment resistance met the criteria.1 Nearly half of those patients left …

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ADHDSep 30, 2026

Neurofibromatosis Type 1: 33% Have ADHD, 11% Autism, 11% Seizures

A 2026 meta-analysis of 50 studies estimated that about 1 in 3 people with neurofibromatosis type 1 (NF1) have ADHD (33%), and that roughly 1 in 10 have autism (11%), seizures (11%), depress…

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AddictionMay 24, 2026

Teen Substance Use in South Africa: 30-Study Meta-Analysis

A 2026 PRISMA-compliant systematic review and meta-analysis in Drug and Alcohol Review consolidated 30 publications covering 202 prevalence estimates from 120,041 South African adolescents: …

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