δείτε την πρωτότυπη σελίδα τεκμηρίου στον ιστότοπο του αποθετηρίου του φορέα για περισσότερες πληροφορίες και για να δείτε όλα τα ψηφιακά αρχεία του τεκμηρίου*
The diagnostic validity of the Athens Insomnia Scale
Objective: To provide documentation for the diagnostic validity of the
Athens Insomnia Scale (AIS), a self-assessment psychometric tool which
has previously shown high consistency, reliability and external validity
for the evaluation of the intensity of sleep difficulty. Methods: The
AIS was administered to a total of 299 subjects (105 primary insomniacs,
100 psychiatric outpatients, 44 psychiatric inpatients and 50 nonpatient
controls) who were also assessed for the ICD-10 diagnosis of
“nonorganic insomnia” blindly in terms of the AIS scores. Results:
176 subjects were identified as insomniacs and 123 as noninsomniacs.
Logistic regression of AIS total score against the ICD-10 diagnosis of
insomnia demonstrated that a score of 6 is the optimum cutoff based on
the balance between sensitivity and specificity. When diagnosing
individuals with a score of 6 or higher as insomniacs, the scale
presents with 93% sensitivity and 85% specificity (90% overall
correct case identification). For this cutoff score, in the general
population, the scale has a positive predictive value (PPV) of 41% and
a negative predictive value (NPV) of 99%. For the same cutoff score,
among unselected psychiatric patients, the PPV was found to be 86% and
the NPV 92%. Other cutoff scores can be also considered, however,
depending on the importance of avoiding false positive or false negative
results; for example, for a cutoff score of 10, the PPV in the general
population reaches about 90% without the NPV becoming lower than 94%.
Conclusion: The AIS can be utilized in clinical practice and research,
not only as an instrument to measure the intensity of sleep-related
problems, but also as a screening tool in reliably establishing the
diagnosis of insomnia. (C) 2003 Elsevier Inc. All rights reserved.
(EN)
*Η εύρυθμη και αδιάλειπτη λειτουργία των διαδικτυακών διευθύνσεων των συλλογών (ψηφιακό αρχείο, καρτέλα τεκμηρίου στο αποθετήριο) είναι αποκλειστική ευθύνη των αντίστοιχων Φορέων περιεχομένου.
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