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Introduction and hypothesis: Sling surgery is common for stress urinary incontinence (SUI). Yet many women have stress-predominant mixed urinary incontinence (MUI). The change in urgency/urge urinary incontinence (U/UUI) following treatment is not well documented. Our aim was to assess changes in U/UUI in women undergoing a sling placement for MUI and correlate this with improvement in quality of life (QOL). Methods: This was a retrospective review of women treated for SUI with either an autologous rectus fascia pubovaginal sling (AF-PVS) or synthetic retropubic midurethral sling (MUS). Validated questionnaires-Urogenital Distress Inventory (UDI-6), Incontinence Impact Questionnaire-Short Form (IIQ-7), and visual analog scale (VAS) were obtained pre- and postoperatively. The independent association between change in storage symptoms and subjective cure-as defined by improved overall score on UDI-6, VAS score ≥ 7, or both -were assessed using multivariate logistic regression. Results: Nine hundred and twenty-seven women were identified for inclusion; 718 (77.5 %) had preoperative MUI, of whom 487 (67.8 %) received an MUS and 231 (32.2 %) an AF-PVS. Similar objective cure rates were noted following MUS vs. AF-PVS (78.2 % vs. 71.9 %, p = 0.315). Subjectively, women treated with MUS experienced greater improvement in U/UUI (72.8 % vs. 57.6 %, p = <0.001) than AF-PVS. Multivariate analysis showed MUS patients were more than twice as likely to show subjective improvement in UDI-6 and VAS scores than the AF-PVS cohort. Postoperatively, validated questionnaires were significantly associated with storage symptom outcome. Conclusions: Patients with U/UUI experience significant symptom improvement following treatment for MUI. QoL assessment following surgery is directly correlated with improvement in U/UUI. [ABSTRACT FROM AUTHOR]