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Please use this identifier to cite or link to this item: http://hdl.handle.net/10564/4087

Title: A new nomogram of urinary flow rate and volume based on multiple measurements per healthy adult Japanese men using a portable uroflowmeter (P-Flowdiary®).
Other Titles: 日本人男性における携帯式尿流量計(P-Flowdiary®)を用いた排尿量/尿流量に関する年齢階層別ノモグラムの作成
Authors: Shinohara, Masatake
Torimoto, Kazumasa
Matsushita, Chie
Gotoh, Daisuke
Yoshida, Hisashi
Saka, Toshihisa
Hirao, Yoshihiko
Hirayama, Akihide
Fujimoto, Kiyohide
Keywords: Age
Urinary flow rate
Urinary volume
Issue Date: 25-Aug-2022
Publisher: BioMed Central / Springer Nature
Citation: BMC urology Vol.22 No.1 Article No.130 (2022 Aug)
Abstract: Background: To develop a nomogram of urinary volume and flow based on the data of Japanese men without lower urinary tract symptoms and multiple flows per participant whose characteristics were clear. Methods: Overall, 101 Japanese male volunteers without lower urinary tract symptoms aged between 20 and 59 years were enrolled. A portable uroflowmeter (P-Flowdiary®) was used to record urinary information (flow rate and volume) for 2 successive days. The model (quadratic, linear, or logarithmic regression) most fit for the relationship between maximum flow rate and voided volume was determined. The maximum flow rate at > 150 mL was compared among the 20-29-, 30-39-, 40-49-, and 50-59-year age groups. Nomograms appropriate for the age groups were created. Results: The mean age, International Prostate Symptom Score, and Overactive Bladder Symptom Score were 38.5 years, 0.42, and 0.24, respectively. The quadratic regression model was the most fit because its mean coefficient determination was 0.93 ± 0.06. The mean maximum flow rate was significantly lower in the 50-59-year age group (21.8 ± 5.05 mL/s, P < 0.01) than in the younger groups (24.14 ± 4.94, 24.05 ± 6.99, and 24.64 ± 5.72 mL/s). The 2 nomograms are Y = 28.99 {1 - exp(- 0.01 × X)} and Y = 25.67 {1 - exp(- 0.01 × X)} for the 20-49- and 50-59-year age groups, respectively. Conclusions: The nomogram can predict maximum flow rate based on voided volume in Japanese men aged 20-59 years without lower urinary tract symptoms.
Description: 博士(医学)・甲第858号・令和4年12月22日
© 2022. The Author(s). Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
URI: http://hdl.handle.net/10564/4087
ISSN: 14712490
DOI: https://doi.org/10.1186/s12894-022-01086-5
Academic Degrees and number: 24601A858
Degree-granting date: 2022-12-22
Degree name: 博士(医学)
Degree-granting institutions: 奈良県立医科大学
Appears in Collections:2022年度

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