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54 The effect of toileting behavior in uroflow curves in young healthy nulliparous women O. F. Duenas, R. Shapiro, M. Matta, K. Fuller OBGYN, West Virginia University, Morgantown, WV OBJECTIVES: To determine the effect of voiding positions in uroflow parameters in young healthy nulliparous women with no pelvic floor disorders. MATERIALS AND METHODS: From December 2017 to February 2018 we performed a single-institution cross-sectional study with 30 healthy volunteers comparing uroflow curves in sitting and hovering positions. Forty-nine participants were initially pre-screened with a validated tool questionnaire for pelvic floor disorders and 30 participants who had absent symptoms were included for the final analysis. From the selected participants, demographics were collected and comparisons between the sitting and hovering position groups regarding the maximum flow rate (Qmax), average flow-rate (Qave), voided volume (VV), time to peak flow (TQmax) were conducted using either the paired t-test or the Wilcoxon signed ranks test. In addition, liner regression analysis was performed to determine whether height, BMI, and age have significant impact on the log transformed average of the preand postvalues of either Qmax, Qave, VV, or TQmax, as the average of these values are not normally distributed. RESULTS: There were no statistical differences between the voiding and sitting position groups on the maximum flow rate (p1⁄40.93), average flow-rate (p1⁄40.82), voided volume (p1⁄40.53) and time to peak flow (p1⁄40.82). In addition, height, BMI, and age basically did not have significant impact on log transformed average of the preand postvalues of either Qmax, Qave, VV, or TQmax, except when BMI had borderline significant impact on Qave with pvalue1⁄40.0531.