Importance of the problem OAB is a common health problem. Milsom et al. [1] randomly selected a population from six European countries. From this population, 17% of the respondents reported having OAB symptoms with 14% reporting frequency, 9% urgency, and 6% urge incontinence. The study by Milsom et al. [1] showed that OAB adversely affected the lives of the majority (65%) of the respondents who reported OAB symptoms. Chen et al. [2] also reported that the prevalence of OAB in Taiwanese women was similar to that of Western women. In the study of Chen et al.[2], the prevalence of OAB was 18.6% for the patients; perceptions and the number of OAB condition significantly increased in the elderly women (over 65 years old, 39.3%). Apart from impairing the physical health, OAB may have a tremendous effect on psychological and social well-being. Information on the symptoms and disease severity can yield important information that often complements objective measures.