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Sleep Regularity Index in Patients with Alcohol Dependence: Daytime Napping and Mood Disorders as Correlates of Interest

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National Institutes of Health Clinical Center, 10 Center Drive, Bethesda, MD 20892, USA
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Mathematical and Statistical Computing Lab/CIT/NIH, 12 South Drive Bldg 12A Room 2001, Bethesda, MD 20892, USA
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Corporal Michael J. Crescenz VA Medical Center, Perelman School of Medicine, MIRECC, 2nd Floor, Mail stop 116, 3900 Woodland Avenue, Philadelphia, PA 19104, USA
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Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(1), 331; https://doi.org/10.3390/ijerph17010331
Received: 1 November 2019 / Revised: 30 December 2019 / Accepted: 2 January 2020 / Published: 3 January 2020
(This article belongs to the Special Issue Sleep and Wellbeing)
Alcohol use disorder (AUD) is often accompanied by comorbid conditions, including sleep disturbances related to sleep regularity and timing. The Sleep Regularity Index (SRI) is a novel measure that assesses the probability that an individual is awake (vs. asleep) at any two time points 24 h apart. We calculated actigraphy-based SRI on 124 participants with alcohol dependence to capture the effects of changes in sleep timing and duration among patients enrolled in an inpatient alcohol treatment program. During the course of the study, the mean SRI increased between weeks 1 and 3 (75.4 to 77.8), thus indicating slightly improved sleep quality and regularity during alcohol treatment. Individuals within the bottom quartile of SRI scores at week 1 improved significantly over time. Average total SRI for individuals with no mood disorders was slightly higher than that for individuals with one or more mood disorders. Increased SRI scores were associated with lower total nap duration from week 1 to week 3. Increased SRI scores were associated with decreased mental/physical exhaustion scores from week 1 to week 3. The SRI could be a target for assessment/intervention in certain sub-groups of individuals undergoing inpatient treatment for AUD. View Full-Text
Keywords: alcohol use disorder; sleep disturbance; insomnia; sleep regularity; mood disorder; substance use disorder alcohol use disorder; sleep disturbance; insomnia; sleep regularity; mood disorder; substance use disorder
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Brooks, A.T.; Raju, S.; Barb, J.J.; Kazmi, N.; Chakravorty, S.; Krumlauf, M.; Wallen, G.R. Sleep Regularity Index in Patients with Alcohol Dependence: Daytime Napping and Mood Disorders as Correlates of Interest. Int. J. Environ. Res. Public Health 2020, 17, 331.

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