Schizophrenia refers to both a single condition and a group of conditions classified as psychotic disorders. These are conditions in which a person feels a "disconnection" from reality which can manifest in a variety of ways. Schizophrenia typically manifests itself at different ages depending on gender. It usually begins between the ages of 15 and 25 for men and between the ages of 25 and 35 for women. It also affects both men and women in equal numbers.