A new study suggests that about two-thirds of Americans who have schizophrenia and bipolar disorder are deaf, and the prevalence of hearing loss among the population is even higher.
The researchers, led by Sarah Ehrlich at the University of California, Los Angeles, looked at data from the National Survey of Hearing Loss, a nationally representative sample of the U.S. population.
They found that of those who reported having either of those mental disorders, a quarter reported hearing loss at some point during their lifetime.
They also found that deafness is more common in men than in women.
“When we compare hearing loss to other types of mental health, we see that deaf people are at higher risk for hearing loss,” Ehrich said.
“It’s a particularly prevalent finding in women.”
The researchers also found higher rates of hearing-loss among those with bipolar disorder, schizophrenia and schizophrenia-like symptoms.
The researchers used data from a nationally-representative survey of more than 3,000 adults in the U, with the goal of better understanding the prevalence and risk factors of mental illness in the general population.
The research was published online by the journal Archives of General Psychiatry.