Delusions are a common symptom of schizophrenia, and a significant majority of individuals diagnosed with schizophrenia experience delusions. According to the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), delusions are one of the primary diagnostic criteria for schizophrenia.
Delusions are false beliefs that are not based on reality and are resistant to change, even when presented with evidence to the contrary. They can take various forms, such as paranoid delusions (believing others are plotting against them), grandiose delusions (having an exaggerated sense of self-importance), or somatic delusions (believing there is something physically wrong with their body).
It's important to note that the percentage of people with schizophrenia who experience delusions can vary depending on the study, the population being assessed, and the specific subtype of schizophrenia. However, as a general estimate, it is commonly reported that approximately 90% or more of individuals with schizophrenia have experienced delusions at some point during the course of their illness.
Delusions, along with other symptoms such as hallucinations, disorganized thinking, and negative symptoms (e.g., reduced emotional expression or motivation), contribute to the complexity of schizophrenia. Early diagnosis, appropriate treatment, and ongoing support are crucial for individuals with schizophrenia to manage their symptoms and improve their quality of life.