Development and feasibility assessment of a 3 day electronic bladder diary as an app for smart-phone.

AIMS: To develop a 3 day bladder diary (BD) as an easy-to-use application for smart-phone (eDM3d). To test its feasibility and acceptance in a reduced number of patients.

METHODS: An external agency developed the eDM3d following the structure of the Spanish validated 3 day BD (DM3d©), which includes a frequency-volume chart, the assessment of the grade of urgency, the incontinence events and fluid intake. The eDM3d consisted in a main interface of four buttons ("wake up," "go to bed," "urinate," "drink") which had to be clicked to create an event. Results were automatically transferred to an internet server to obtain an electronic report. We recruited 25 patients with overactive bladder syndrome or nocturia and previous experience on paper BD. They were asked to complete the eDM3d. Finally, a direct question about satisfaction was answered: "If you had to complete a BD again, would you choose the paper or the app version?"

RESULTS: Three patients (12%) did not complete the eDM3d, 1 patient (4%) completed 2 days of the eDM3d and did not register volumes of micturition nor fluid intake, 1 patient (4%) completed all 2 days variables and 20 patients (80%) completed all 3 day variables. Regarding satisfaction, 19 patients (86.4%) would choose the app version, 2 patients (9.1%) would choose a paper version and 1 patient (4.5%) would choose either indistinctly.

CONCLUSIONS: The eDM3d is a useful tool easily filled in by patients with a high satisfaction rate. Adequate validation of the eDM3d is required.