A study in the Journal of the American Medical Association (JAMA) looked at nearly 5,000 police officers in North America and found that 40.4% screened positive for some kind of sleep disorder, most commonly OSA. A smaller percentage of officers screened positive for insomnia and shift work sleep disorder. The study found that those officers who reported symptoms of a sleep disorder were more likely than those who didn’t to experience a variety of problems, including physical and mental illnesses, such as diabetes and depression; “uncontrolled anger” toward suspects; falling asleep while driving; and absenteeism.

Read about the study in the Wall Street Journal