What sleep efficiency score is classified as insomnia?

A sleep efficiency score of less than 80% is classified as indicative of insomnia. Sleep efficiency is determined by the ratio of total sleep time to the total time spent in bed, expressed as a percentage. When this score drops below 80%, it suggests significant difficulties in sleeping, as individuals are unable to maintain adequate sleep relative to the time spent trying to sleep.

This classification is vital for diagnosing insomnia since it illustrates a functional impairment in sleep quality and quantity. The other ranges provided do not meet the criteria for diagnosing insomnia, as they indicate either a more favorable sleep efficiency or do not reach the threshold recognized in clinical practice for sleep disorders. Understanding this threshold is essential for identifying and managing insomnia effectively.