Study Objectives: Perfectionism has been suggested to represent a predisposing factor for poor sleep. However, previous studies have relied on selfreported measures. The association between perfectionism and poor sleep measured by polysomnography (PSG) warrants further investigation. Methods: The current retrospective exploratory study used the Frost Multidimensional Perfectionism Scale and PSG in an unselected sample of 334 consecutive sleep laboratory patients (140 males, 194 females, 44.6 ± 15.9 years). Data were analyzed using linear regression analyses. Results: High levels of perfectionism were associated with PSG-determined markers of poor sleep in the first sleep laboratory night. The total Frost Multidimensional Perfectionism Scale score was significantly associated with the number of nocturnal awakenings in the first sleep laboratory night. The subscales "concern over mistakes" and "personal standards" of perfectionism were significantly associated with markers of poor sleep. In contrast, there were only a few associations between perfectionism and PSG variables of the second sleep laboratory night. Conclusions: This pattern of results suggests that high levels of perfectionism may predispose individuals to sleep disturbances in the context of acute stressors. Thus, the influence of perfectionism on poor sleep should be further investigated to improve treatment.
I NTRO DUCTI O NPerfectionism is a personality trait that has been defined as a dispositional tendency to set excessively high standards and to evaluate one's own performance in an overly critical manner. 1 Perfectionism has been linked to several mental disorders including eating, anxiety, and depressive disorders.2 In addition, perfectionism may be a predisposing factor for poor sleep. [3][4][5] This may be due to the fact that the maladaptive form of perfectionism includes excessive concerns about making mistakes and is associated with worry and rumination. 6 Worry and rumination at bedtime are, in turn, assumed to lead to sleep onset and sleep maintenance difficulties.7 In particular, it has been suggested that individuals with high levels of perfectionism are more concerned about the effects of acute sleep disturbances on their daytime performance. 4 This may lead to increased worry and arousal at bedtime; therefore, perfectionism may contribute to the transition from acute to chronic sleep disturbances. It may be hypothesized that individuals prone to perfectionism actively attempt to force sleep initiation, a strategy called sleep effort that does not pay off and leads to sleep disturbances. 3,8 In line with these theoretical considerations, previous evidence suggests that individuals who fulfill the diagnostic criteria for insomnia present with higher levels of perfectionism than good sleepers. 9,10 Additionally, several studies showed that patients with insomnia strive for perfection on a behavioral level. [11][12][13] Longitudinal studies suggest that perfectionism Perfectionism is often assessed using the Hewitt and Flett Multidimen...