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To evaluate the prevalence of daytime urinary frequency among Taiwanese women aged 20-59 years. In 1998, there were an estimated 5.9 million female residents aged 20-59 years in Taiwan. A random sample of 4,549 women was chosen by multistage sampling. Face-to-face visits with 3,537 women were completed by trained professional interviewers within 3 months of the subjects' selection. Questions about...
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