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. Author manuscript; available in PMC: 2009 Jan 1.
Published in final edited form as: Sleep Med. 2007 Sep 6;9(1):27–32. doi: 10.1016/j.sleep.2006.12.009

Table 1.

Diagnostic Criteria for Insomnia

(1) Complaint of insomnia

  • Reported current insomnia on health survey

(2) Poor sleep

  • SOL or WASO ≥ 31 minutes

  • occurring ≥ 3 nights a week, and

  • duration ≥ 6 months

(3) Impaired daytime functioning on at least one of these:

  • Epworth Sleepiness Scale score ≥ 7.4

  • Fatigue Severity Scale score ≥ 5.5

  • Insomnia Impact Scale score ≥ 125

  • Beck Depression Inventory score ≥ 10

  • State-Trait Anxiety Inventory score ≥ 37

SOL – sleep onset latency; WASO – wake time after sleep onset