Clinical Characteristics of Primary Insomniacs with Sleep-State Misperception
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Background and Purpose The aims of this study were to determine the prevalence of sleep-state misperception and to identify any diferences in the clinical characteristics of primary insomniacs with and without misperception. Methods In total, 250 adult primary insomniacs were enrolled whose objective total sleep time (TST) was more than 120 min, as assessed by full-night polysomnography. Sleep state misperception was defned objectively as a TST of at least 6.5 h and an objective sleep efciency (SE) of at least 85%. Results The prevalence of sleep-state misperception in primary insomniacs was 26.4%. The (low) quality of sleep and psychiatric parameters were similar in the two groups, although the objective sleep architecture was relatively normal for the misperception group. Multivariate analysis revealed that both SE and sleep quality were signifcant factors associated with subjective TST in the misperception group, while only SE was signifcant in those without misperception. Subjective TST was a signifcant efect factor with respect to sleep quality in the misperception group, while the Beck Depression Inventory-2 score and age were signifcant factors in those without misperception. Conclusions Te clinical characteristics of patients with sleep-state misperception difered from those without this condition. Tis suggests that these two groups should be separated and the treatment goals tailored specifcally to each.
Abstract
Background and Purpose The aims of this study were to determine the prevalence of sleep-state misperception and to identify any diferences in the clinical characteristics of primary insomniacs with and without misperception. Methods In total, 250 adult primary insomniacs were enrolled whose objective total sleep time (TST) was more than 120 min, as assessed by full-night polysomnography. Sleep state misperception was defned objectively as a TST of at least 6.5 h and an objective sleep efciency (SE) of at least 85%. Results The prevalence of sleep-state misperception in primary insomniacs was 26.4%. The (low) quality of sleep and psychiatric parameters were similar in the two groups, although the objective sleep architecture was relatively normal for the misperception group. Multivariate analysis revealed that both SE and sleep quality were signifcant factors associated with subjective TST in the misperception group, while only SE was signifcant in those without misperception. Subjective TST was a signifcant efect factor with respect to sleep quality in the misperception group, while the Beck Depression Inventory-2 score and age were signifcant factors in those without misperception. Conclusions Te clinical characteristics of patients with sleep-state misperception difered from those without this condition. Tis suggests that these two groups should be separated and the treatment goals tailored specifcally to each.
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