insomnia is a common complaint among community
residents and primary care patients. Prevalence rates
of self-reported sleep difficulty range from 10% to 40%
. Epidemiologic surveys have typically shown that
sleep disturbance is more prevalent among the elderly, those with chronic medical illness , and those
with anxiety or depressive disorders Previous studies of community residents and primary
care patients indicated a large burden of impairment
associated with insomnia. In a survey of telecommunications
employees, Kuppermann et al.