The prevalence of mental health conditions varies by region, age, gender, and other demographic factors. According to the World Health Organization (WHO), approximately 1 in 4 people worldwide will experience a mental health condition at some point in their lives. Surveys such as the National Comorbidity Survey in the United States provide detailed prevalence data, indicating that anxiety disorders are the most common, affecting around 18% of the population annually, followed by mood disorders at 9.5%.
