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# 345 - The association of nocturia and daytime sleepiness symptoms

Kim DK, Kim JC, Kim HJ

By Donald Bliwise

This short paper presented data from a Korean population indicating that nocturia was associated with daytime sleepiness, presumably reflecting the daytime consequences of nighttime sleep interruption. The study adds to the growing list of descriptive and interventional studies suggesting that daytime consequences of nocturia (decreased quality of life, decreased work productivity, or in this case, frank daytime sleepiness) are pronounced.

Commentary: In themselves, these data are not unique to the nocturia literature, but the authors provided a novel modification of the conventional instrument used to assess sleepiness (the Epworth Sleepiness Scale) by introducing several changes to enhance content validity of the instrument. For example, nocturia was associated with sleepiness when watching TV while sitting, but less so when lying, and nocturia was more strongly associated with sleepiness when using public transportation in standing rather than sitting position. Although changing items in a scale always introduces lack of comparability across studies, for the goals of this particular work, the changes are of less consequence. What I find interesting about these modifications is that changes are quite believable, since more profound sleepiness intruding upon less expected situations presumably could suggest a more serious set of consequences (e.g., drowsiness when standing in a subway car). These data indicate that the sleepiness accompanying nocturia can be quite impactful on daily functioning.