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J Urol. 1987 Apr;137(4):698-700.

Comparison of self-reported voided volume with cystometric bladder capacity.


We determined the validity of cystometric bladder capacity compared to self-reported voided urine volumes measured by the patient at home. The subjects included 200 ambulatory incontinent women 55 or more years old who were evaluated with a prospective protocol of home diaries, history, physical examination and urodynamic studies. The mean smallest and largest daily voided volumes, and the daily mean of all voided volumes were determined from the diary. Comparison of the cystometric bladder capacity with the daily voided volumes showed a significant positive correlation between cystometric bladder capacity and the largest voided volume (r equals 0.4938, p less than 0.01). Comparison of the mean daily and mean largest daily void, and the cystometric capacity with the different urodynamic diagnoses using analysis of variance revealed a statistical significance among the groups (p less than 0.01). We established the validity of cystometric bladder capacity in the measurement of functional bladder volume and that a home diary may be useful in clinical practice.

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