From Onset and Prodromal Stage to a Life-Long Course of Schizophrenia and Its Symptom Dimensions: How Sex, Age, and Other Risk Factors Influence Incidence and Course of Illness

Figure 2

Left: ABC Schizophrenia Study: age at onset of schizophrenia (ICD-9: 295, 297, 298.3, 298.4) (first psychotic symptom) by sex; right: population-based first-admission rates for schizophrenia (ICD-8: 295) in Denmark 1976 by age and sex. Source: [9].