INTRODUCTION
Sleep problems are not an inherent part of the aging process.1,2 Many older adults
have good sleep quality until the end of their lives. It is critical that sleep problems
are not mistaken for physiologic changes in sleep-awake patterns and sleep architecture
that occur throughout the lifespan.3,4 Older adults often display an advanced
circadian tendency, having an earlier bedtime and an earlier wake-up time. Sleep architecture
changes include spending an increased proportion of time in stages N1 and
N2 sleep (ie, the lighter stages of sleep), a decreased proportion of time in stage N3