The specific definition put forward was as follows: AI is defined as sleep continuity disturbance (i.e., difficulty initiating and/or maintaining sleep) occurring on at least 3 days per week for anywhere between 1 week and 3 months. The definition had both qualitative and quantitative criteria, included the delineation of sub-states, and required that a precipitating life event or stress condition be identified. Life stress was identified as a/the primary precipitant for insomnia based on a review of several etiological models, and a formal definition of AI was proffered. The central role of precipitating factors for AI was highlighted.
#CONDITIONED INSOMNIA DEFINITION MANUAL#
In the review, three definitions of AI (Diagnostic and Statistical Manual of Mental Disorders, International Classification of Sleep Disorders, and International Classification of Diseases ) were compared and contrasted. In recent years, the issue of “what is acute insomnia and how should it be defined?” has been the subject of renewed interest, largely owing to the conduct of several natural history studies and the publication of one theoretical review dedicated to AI. Finally, it should be noted that the various definitions and nosological classifications for both AI and CI have been made on the basis of consensus opinion and not based on any empirical derivation (e.g., how many consecutive nights must occur until it is unlikely that the insomnia will remit?). sleep latency, wake after sleep onset, early morning awakenings, etc.). Still yet another problem, one that also extends to CI, is that AI has not been defined based on quantitative criteria for sleep continuity disturbance (illness severity viz.
Over the years, CI has been variably defined as more than 1 month, 3 months, or 6 months, and therefore, AI has also been variably defined as shorter than each of these duration thresholds. Another problem has been that the durational criteria for AI has been defined by default by any time period shorter than the criteria for chronic insomnia (CI). Such variability in terminology has discouraged consensus building, both conceptually and operationally. AI has been classified as adjustment insomnia, stress-related insomnia, transient psychophysiological insomnia, symptomatic insomnia, sub-acute insomnia, and sub-chronic insomnia. Part of the problem is multiple terms have been used to refer to AI over this time frame. Historically, acute insomnia (AI) has not been well defined or precisely delineated in the literature, despite its having been included in multiple classification systems since at least the late 1970s. Defining Acute and Chronic Insomnia (Just a Matter of Time?)Īcute Insomnia.
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