Around 40 per cent of all police officers living in the US and Canada suffer from at least one sleep disorder – such as insomnia or obstructive sleep apnea (OSA) – according to a new study. The study of 4,957 police officers in the two countries, conducted by Dr Shantha M. W. Rajaratnam of Brigham and Women’s Hospital in Boston and her colleagues, revealed that these cases of sleep disorders are often linked to an increased risk of poor health, job performance and safety issues. All respondents were asked questions about the above three factors, along with their sleeping habits in their divan beds, and the findings were published online last month in the Journal of the American Medical Association (JAMA). They showed that 33.6 per cent of the participants suffered from OSA, while 6.5 per cent experienced moderate to severe insomnia. The study authors concluded: "Further research is needed to determine whether sleep disorder prevention, screening, and treatment programs in occupational settings will reduce these risks."