Daytime consequences and correlates of insomnia in the United States: Results of the 1991 National Sleep Foundation survey. II

The daytime consequences and correlates of insomnia were examined in the Na tional Sleep Foundation and the Gallup Organization survey of 1,000 randoml y selected Americans. Respondents were grouped as having occasional insomni a, chronic insomnia or no insomnia. There were dramatic differences in repo rted waking behaviors and psychosocial measures by insomniacs compared to t hose who do not report sleep difficulty. These problems include impaired co ncentration, impaired memory, decreased ability to accomplish daily tasks a nd decreased enjoyment of interpersonal relationships. Importantly, most of these variables showed an increasing degree of impairment with greater fre quency of sleep disturbance. These findings suggest that insomnia negativel y impacts aspects of waking function related to quality of life.