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PubMed, PsycINFO, and Social Science Citation Index (1966–2004); the Cochrane Controlled Trials Register; and reference lists.
Study selection and assessment:
randomised controlled trials (RCTs) that were published in English language, peer reviewed journals; enrolled adults with a diagnosis of primary insomnia; included ⩾1 cognitive behaviour therapy intervention; included ⩾1 of 5 sleep outcomes; and reported data that were not markedly non-normal. 23 RCTs met the selection criteria. Study quality was assessed using the recommendations of the Cochrane Library. RCTs with multiple treatments had 1 treatment selected …
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