To evaluate the usability and accuracy of a newly developed automated bladder diary (BD) device, the Uro-diary Checker (UDC), in comparison with a conventional handwritten BD.
In this prospective, multi-institutional observational study, 40 patients with lower urinary tract symptoms (LUTS) were recruited between April 2023 and October 2024. Participants recorded their voiding patterns using a handwritten BD for 3 days and the UDC for the next 3 days. The UDC automatically recorded voiding time and volume when a urine cup was placed on the device, and the data were transferred via Bluetooth to a computer. The primary endpoint was usability, assessed using the System Usability Scale (SUS), a validated 10-item Likert-scale questionnaire.
Of the 40 enrolled patients, 31 successfully completed records using both methods and were included in the final analysis. The mean patient age was 72.6±9.8 years; 24 were male and 7 were female. The SUS score was significantly higher for the UDC (72.9±19.3) than for the BD (60.6±19.5; p<0.01), exceeding the benchmark score of 68 and indicating good usability. UDC-recorded urine volumes were highly consistent with BD measurements for both 24-h urine volume (r=0.86, p<0.01) and average voided volume (r=0.77, p<0.01).
The UDC demonstrated significantly greater usability than the conventional BD while maintaining comparable accuracy for urine volume measurements, suggesting its potential to improve adherence and efficiency in LUTS evaluation.
Urology. 2026 Jun 08 [Epub ahead of print]
Yoshinaga Okumura, Yoshie Amaya, Sou Inamura, Mahiro Inamura, Kimika Kaeriyama, Nodoka Okubo, Sahoko Shimada, Tadashi Kakitsuba, Wonseok Seo, Nobuki Tanaka, Yusuke Fukiage, Takafumi Kabuto, Manami Tsutsumiuchi, Masaya Seki, Minekatsu Taga, Naoki Terada
Department of Urology, University of Fukui., Department of Nursing, University of Fukui Hospital., Department of Urology, University of Fukui. Electronic address: .