Final answer:
Late-onset schizophrenia generally refers to the onset of symptoms after the age of 50 and is associated with a more favorable prognosis compared to early-onset schizophrenia.
Step-by-step explanation:
Late-onset schizophrenia is a subset of schizophrenia that is characterized by an onset of symptoms at a later age compared to the typical age range for the disorder, which is late adolescence to early adulthood. The correct answer to the question of after what age late-onset schizophrenia symptoms typically begin is C. 50 years old.
Compared to early-onset schizophrenia, late-onset schizophrenia often presents with a more favorable prognosis. Although it shares many of the same symptoms, such as difficulties with differentiating between reality and imagination, emotional regulation, and social interactions, individuals with late-onset schizophrenia may experience a less severe decline in overall functioning.
Late-onset schizophrenia is considered less common and the research suggests certain differences in clinical features and potentially, treatment response, compared to those diagnosed at a younger age.