Primary and secondary insomnia

Abstract

Insomnia is a serious health problem. With an estimated 30 000 000 Americans experiencing chronic, clinically significant insomnia [1], this condition is the most prevalent sleep disorder and is among the most prevalent psychiatric disorders. The health burden of insomnia is felt in a number of ways. It has an estimated annual economic impact in the United States alone of about $ 14 billion as of 10 years ago [2]. Not only is nighttime experience degraded, but quality of life, broadly conceived, is also compromised [3].