Donald L Bliwise1, Tove Holm-Larsen2, Sandra Goble3, Jens Peter Nørgaard3. 1. Program in Sleep Medicine, Emory University School of Medicine, Atlanta, GA. 2. Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark. 3. Global Research and Development, Ferring Pharmaceuticals, Copenhagen, Denmark.
Abstract
STUDY OBJECTIVE: To examine associations between diary-based reports of the time to first void and a commonly used measure of sleep across the entire night, the Pittsburgh Sleep Quality Index (PSQI). DESIGN AND SETTING: Data from the Baseline phase of a large, multi-site, US-based, randomized clinical trial of a nocturia medication were analyzed. We examined age-adjusted associations between time to first void as reported in a 3-day diary and PSQI Global and individual subscale scores. PATIENTS: 757 patients with nocturia completing Baseline measurements. INTERVENTIONS: None. MEASUREMENTS AND RESULTS: Using quartile analysis, higher scores indicating poorer sleep on all PSQI scales were associated (p's ≤ 0.05) with short time to first void durations. Among individuals in the lowest quartile of time to first void (< 1.17 hours), the odds ratio (OR) of a PSQI Global score > 5 was nearly 3 times (2.96; 95% CI 1.75-5.01) that of those in the highest quartile (> 2.50 h). Shorter time to first void was associated with lower sleep quality, shorter sleep duration, poorer sleep efficiency, and greater daytime dysfunction. CONCLUSIONS: Time to first void may serve as a valuable adjunctive, self-report measure for characterizing poor sleep among populations with nocturia.
RCT Entities:
STUDY OBJECTIVE: To examine associations between diary-based reports of the time to first void and a commonly used measure of sleep across the entire night, the Pittsburgh Sleep Quality Index (PSQI). DESIGN AND SETTING: Data from the Baseline phase of a large, multi-site, US-based, randomized clinical trial of a nocturia medication were analyzed. We examined age-adjusted associations between time to first void as reported in a 3-day diary and PSQI Global and individual subscale scores. PATIENTS: 757 patients with nocturia completing Baseline measurements. INTERVENTIONS: None. MEASUREMENTS AND RESULTS: Using quartile analysis, higher scores indicating poorer sleep on all PSQI scales were associated (p's ≤ 0.05) with short time to first void durations. Among individuals in the lowest quartile of time to first void (< 1.17 hours), the odds ratio (OR) of a PSQI Global score > 5 was nearly 3 times (2.96; 95% CI 1.75-5.01) that of those in the highest quartile (> 2.50 h). Shorter time to first void was associated with lower sleep quality, shorter sleep duration, poorer sleep efficiency, and greater daytime dysfunction. CONCLUSIONS: Time to first void may serve as a valuable adjunctive, self-report measure for characterizing poor sleep among populations with nocturia.
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