Table 2.

Definitions for state transitions*

Acute insomnia (AI)	Two or more consecutive weeks with a frequency of ≥3 nights/week of sleep latency and/or wake after sleep onset (WASO) severity ≥30 min.
Recovery (REC)	Within a 12-week period, 7 or more weeks of good sleep after AI and/or CI episodes where the final 4 weeks in the period must be designated as good sleep.
Persistent poor sleep (PPS)	Recurring bouts of AI without transition to CI or REC
Chronic insomnia (CI)	10 or more weeks in a 12-week period with same frequency and severity criteria as AI

*Participants that did not meet either transition criteria were considered continuous good sleepers.