![]() Some standardized instruments, however, have been developed for the measurement of sleep difficulties in clinical settings: the Leeds Sleep Evaluation Questionnaire, , the St. ![]() Such instruments may be adequate for the purposes of a given study allowing comparisons between conditions or groups of individuals, but they are usually not standardized or uniform - making the integration of results from various studies impossible. ![]() In most studies assessing subjective sleep difficulties, self-devised questionnaires and sleep diaries are utilized. Problems with poor sleep are quite frequent in the general population their prevalence ranges from 10% to 30%, ,, , and it is much higher among patients with psychiatric disorders,. Conclusion: The high measures of consistency, reliability, and validity of the AIS make it an invaluable tool in sleep research and clinical practice. ![]() As far as external validity is concerned, the correlations of the AIS-8 and AIS-5 with the Sleep Problems Scale were 0.90 and 0.85, respectively. The test–retest reliability correlation coefficient was found almost 0.90 at a 1-week interval. Moreover, in the factor analysis, the scale emerged as a sole component. Results: Regarding internal consistency, for both versions of the scale, the Cronbach's α was around 0.90 and the mean item–total correlation coefficient was about 0.70. The validation of the AIS was based on its administration to 299 subjects: 105 primary insomniacs, 144 psychiatric patients and 50 non-patient controls. Either the entire eight-item scale (AIS-8) or the brief five-item version (AIS-5), which contains only the first five items, can be utilized. It consists of eight items: the first five pertain to sleep induction, awakenings during the night, final awakening, total sleep duration, and sleep quality while the last three refer to well-being, functioning capacity, and sleepiness during the day. Methods: The AIS is a self-assessment psychometric instrument designed for quantifying sleep difficulty based on the ICD-10 criteria. As far as external validity is concerned, the correlations of the AIS-8 and AIS-5 with the Sleep Problems Scale were 0.90 and 0.85, respectively.ĬONCLUSION: The high measures of consistency, reliability, and validity of the AIS make it an invaluable tool in sleep research and clinical practice.Objectives: To describe and validate the Athens Insomnia Scale (AIS). The test-retest reliability correlation coefficient was found almost 0.90 at a 1-week interval. ![]() 90 and the mean item-total correlation coefficient was about 0.70. RESULTS: Regarding internal consistency, for both versions of the scale, the Cronbach's alpha was around 0. METHODS: The AIS is a self-assessment psychometric instrument designed for quantifying sleep difficulty based on the ICD-10 criteria. OBJECTIVES: To describe and validate the Athens Insomnia Scale (AIS). ![]()
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