Schizophrenia affects around 0.3–0.7% of people at some point in their life, or 21 million people worldwide as of 2011 (about one of every 285). By using precise methods in its diagnosis and a large, representative population, schizophrenia seems to occur with relative consistency over time during the last half-century. While it is claimed that schizophrenia occurs at similar rates worldwide, its prevalence and incidence varies across the world, within countries, and at the local and neighborhood...