Abstract
Purpose
To determine if patients can accurately estimate volumes voided in a bladder diary, and to determine the patient characteristics that are most predictive of accuracy in volume estimation in the workup of lower urinary tract symptoms (LUTs).
Methods
We prospectively collected data on 180 consecutive patients undergoing a workup for LUTs at a tertiary care facility. Data collected include American Urological Association Symptom Scores (AUASS), flow time and rate, and one time measurement of voided volume into a blinded uroflow. Baseline characteristics and demographics were recorded. Descriptive statistics and linear regression analysis were performed to examine predictors of estimated voiding volume (mL) in SAS Version 9.4 (SAS Institute, Inc., Cary, NC, USA).
Results
Median age and BMI were 64 years (SD = 15.4) and 26.9 kg/m2 (SD = 4.6), respectively. The median estimated voided volume and actual voided volume were 120 mL (range 1–480) and 101.5 mL (range 6.5–622.0), respectively. On linear regression analysis, 47.1% of patients estimated volume voided with a 20% margin of error, and 63.2% of patients estimated with a 30% margin of error. Each 1-year increase in age correlated with a 2% decrease in the odds of estimating voided volume within 20% of actual volume (p < 0.05). For each 1 unit increase in flow rate, there was an 8% (p < 0.005) increase in the odds of estimating voided volume within 20% of actual volume.
Conclusions
Just under half of patients can accurately estimate volume voided with a margin of error of 20%.
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Acknowledgements
The authors thank Victoria Cooley, MS and Paul Christos, Dr.PH, MS.
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MK: protocol/project development, data collection or management, data analysis, manuscript writing/editing. DT: protocol/project development, data collection or management, data analysis, manuscript writing/editing. NZ: protocol/project development, data collection or management, data analysis, manuscript writing/editing. DD: data collection or management, data analysis, manuscript writing/editing. RD: protocol/project development, data collection or management, manuscript writing/editing. BC: protocol/project development, data collection or management, manuscript writing/editing.
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MK, DT, NZ, DD, and RD have nothing to disclose. BC is an investigator for Ipsen, Astellas, and Medi-tate. BC is also a key opinion leader for Boston Scientific. BC is a speaker for Allergan (instructor) and Mist Pharmaceuticals (discontinued).
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Kini, M., Thomas, D., Zaidi, N. et al. Can men with lower urinary tract symptoms (LUTs) predict voided volumes?. World J Urol 38, 1261–1266 (2020). https://doi.org/10.1007/s00345-019-02907-3
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DOI: https://doi.org/10.1007/s00345-019-02907-3