![]() 8, 10 With regard to screening for insomnia and evaluating treatment outcome, there are fewer choices available. There are currently several patient-reported questionnaires available for assessing insomnia symptoms, severity, correlates, and a variety of constructs presumed to contribute to the etiology of insomnia. There is a need for assessment tools that are brief, practical, and psychometrically sound both for screening purposes and treatment outcome evaluation. From a regulatory perspective, patient-reported outcomes are becoming increasingly used to substantiate evidence of treatment effectiveness in clinical trials. The patient's perspective is also of critical importance to monitor progress and evaluate outcome after initiating treatment. Brief and valid questionnaires can facilitate the initial screening and formal evaluation of insomnia. While a clinical evaluation remains the gold standard for making a valid insomnia diagnosis, 8, 9 such an evaluation can be time-consuming in routine clinical practice and may discourage some health practitioners from systematically inquiring about sleep in all of their patients. The assessment of insomnia is multidimensional and should ideally include a clinical evaluation and be complemented by self-report questionnaires and daily sleep diaries. Thus, reliable and valid instruments are needed to assist investigators and clinicians in evaluating insomnia in various research and clinical contexts. Identifying clinically significant insomnia is also important to intervene early and reduce morbidity. Accurate case identification is important for deriving valid estimates of prevalence/incidence and for assessing burden of disease in the population. 1 – 7 Despite its high prevalence and significant morbidity, insomnia often remains unrecognized and untreated, partly due to several barriers to assessment. Insomnia is a highly prevalent condition and carries significant burden in terms of functional impairment, health care costs, and increased risk of depression. ![]()
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