Adherence

Wrist actigraphy provides a valid and reliable estimate of sleep duration and sleep/wake patterns in healthy adults and specific clinical populations, serving as a cost-effective alternative to polysomnography (PSG) for monitoring sleep variability and treatment effects.

Use a wrist actigraph for at least 7 nights to track sleep patterns, especially if you have insomnia or suspect a circadian rhythm disorder. It is more accurate than sleep logs for measuring total sleep time and variability, but do not rely on it for detailed sleep stage analysis or if you have significant movement disorders.