"While factors like lifestyle and mental health can raise your risk for sleep disorders, so can something else: your race. Racial minorities have a higher risk for sleep disorders like insomnia than Caucasians. For example, African Americans are more likely than Caucasians to sleep for fewer than six hours a night and have sleep apnea, poor sleep quality, and daytime sleepiness. On average, African Americans sleep almost an hour less a night than whites.
On top of that, African Americans spend only about 15 percent of their night in a stage called slow-wave sleep (which is considered to be the most restorative phase ). Caucasians, on the other hand, spend 20 percent of their night there, so the sleep that they’re getting is of a higher quality. People of Hispanic and Chinese heritage also have higher rates of issues like sleep-disordered breathing and short sleep durations, compared with whites."
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