For example, incidence of quadriplegia decreased from 2.24 and 10.66 per 100,000 participants in high school and college football in 1976, to 1.30 and 2.66 per 100,000 participants in 1977.
Schizophrenia is a major cause of disability, with active psychosis ranked as the third-most-disabling condition after quadriplegia and dementia and ahead of paraplegia and blindness.