ABSTRACT
INTRODUCTION Insomnia is amajor public health problem that affects millions of individuals worldwide. In addition to reduced quality of life, chronic insomniacs suffer higher rates of medical and psychiatric morbidity and are higher utilizers of healthcare services (1). Estimates of direct and indirect costs of insomnia run in the tens of billions of dollars (2). How many people suffer from insomnia? What are the risk factors associated with it? How does aging affect sleep? How does insomnia affect our health?
