1102 THE RELATIONSHIP BETWEEN SLEEP DISTURBANCE, NEGATIVE AFFECT, AND EMOTION REGULATION

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Although sleep disturbance is often anecdotally associated with increased negative affect, there has been relatively little research that has directly examined this relationship, in either healthy or depressed populations. Therefore, this study aimed to examine the relationship between sleep disturbance, negative affect, including anger and irritability, and emotion regulation in a sample of healthy (HC) and depressed (MDD) active service members of the US Army. Data for this study came from the survey of the All-Army Study (AAS), a component of the Army Study to Assess Risk and Resilience in Service Members (Army STARRS), a representative sample of active duty Army personnel (N=19,506). Diagnosis of MDD was based on the Composite International Diagnostic Interview Screening Scales. Sleep disturbance was coded as absent or present utilizing one survey item. One item was also used to assess frequency of irritability, while composite scores were created and used to assess both frequency of anger and the frequency of utilizing healthy emotion regulation strategies (i.e., “Try new approaches if old ones don’t work”). Results from Multivariate ANOVA revealed a significant sleep disturbance by group (HC, MDD) interaction for irritability, F(1,19502) = 7.437, p<.01, and emotion regulation, F(1,19502) = 4.282, p<.05, but not anger. Post-hoc tests revealed that having sleep disturbance was associated with more irritability and anger, and poorer emotion regulation in healthy controls, however this pattern did not hold for those with MDD. In MDD, sleep disturbance was associated with increased anger, but was not associated with differences in emotion regulation skills. Irritability was associated with sleep disturbance, but to a lesser extent than in HC. The results of this study support the anecdotal evidence that sleep disturbance is associated with greater negative affect in addition to lower utilization of healthy emotion regulation strategies. However, these findings were only true of healthy controls. In those with MDD, increases in sleep disturbance may not play as pivotal a role in increasing emotional dysregulation. None

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