One study, conducted at Penn State College of Medicine in Hershey, Pennsylvania, suggests that insomnia may be as hazardous as obstructive sleep apnea.

• 其中一个由宾夕法尼亚州宾州医学院完成的研究提示失眠症的危害与阻塞性睡眠呼吸暂停综合症相当。