Revista de neurologia
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Revista de neurologia · Dec 2008
[Insomnia Severity Index: some indicators about its reliability and validity on an older adults sample].
The Insomnia Severity Index (ISI) is a short instrument developed to assess insomnia severity from which there is no study in Spain that guarantees its psychometric properties. ⋯ First data of the Spanish version of the ISI endorse single-dimensional structure, with an appropriate internal consistency reliability, and evidences of its measures validity.