Age Related Changes of Voiding Patterns in Women with Overactive Bladder.

Abstract

Purpose: We tried to discover the voiding patterns, which was diurnal & nocturnal urinary volume and voiding frequencies in women with overactive bladder (OAB). Materials and Methods: All voided volumes, times and frequencies were recorded in 249 women with overactive bladder. The subjects age related changes in bladder capacity, urinary volume and frequency were evaluated. The causes of nocturnal urinary frequency and its increase with age in older women with OAB were evaluated using 3 days of voiding diaries. Nocturia was devided into three types: nocturnal polyuria, decreased nocturnal bladder capacity and mixed type. Results: Total voided volume, daytime urine volume, functional bladder capacity were decreased with the age. Nocturnal urine volume and nocturnal urinary frequency were increased with age. Nocturnal polyuria was the major cause for nocturia, and mixed type was increased with age. Conclusions: Voiding symptoms as well as storage symptoms were increased with age in OAB female. In most cases, nocturia was caused by nocturnal polyuria. (J Korean Continence Soc 2009;13:37-44)