Answers are grounded in this paper and cite their sources.
#### Key points Insomnia symptoms are the most frequently reported psychological complaints in Britain Chronic insomnia degrades social and occupational performance, impairs personal safety, can delay recovery from acute illness episodes and is an independent risk factor for major depression
No takes yet. Share an insight, caveat, or question.
Morgan et al. (2011) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: