Initial analysis was descriptive and exploratory in nature to establish the prevalence of sleep disturbances and sleep quality in this inpatient alcohol treatment sample. Data were normally distributed, thus enabling parametric testing. Descriptive statistics were expressed as means and standard deviations for continuous variables and frequencies and percentages for categorical variables. The prevalence of sleep disturbances as measured by the PSQI was calculated for days 2 and 28. A McNemar test was used to compare sleep disturbance prevalence at the 2 time points. Paired t tests were performed to compare the PSQI total score, sleep duration, and sleep latency components. The prevalence of excessive daytime sleepiness was calculated at days 5 and 26. The prevalence was compared using a McNemar test. Patients’ self-reported sleep duration and actigraphy-recorded sleep duration were compared using a paired t test. A P value of less than .05 indicated statistical significance. All data analyses were performed using IBM SPSS 20.0.