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Success rates with retropubic tapes are high, with low complication rates. Bladder perforation in "real", not "trial" data was 3.5 %, which is lower than reported by the Cochrane review (4.5 %). Trainees have a higher perforation rate (p < 0.05) because of learning curves. Outliers are easily identified, and reasons for this should be explored, including proportion of trainees doing the surgery. This analysis confirms that bladder perforation is a valid surrogate for quality with a small but measurable difference. We have a responsibility to analyse data to improve patient care and encourage colleagues to support the International Urogynaecology Association (IUGA) database initiative.

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Aims: Nocturnal polyuria (NP) is defined by the International Continence Society (ICS) as "excessive production of urine during the main sleep period" and is one of the main causes of nocturia. The ICS recognized that "excessive" is not clearly defined and that this needs to be highlighted in both clinical and research settings. The aim of this study was to identify different definitions of NP and apply them to a population of women attending the Urogynaecology clinic. Methods: This was a retrospective study of complete bladder diaries collected from women attending a tertiary Urogynaecology Unit. Six different definitions were identified and were divided into "absolute," "relative," and "functional definitions." Prevalence data were calculated and values generated for sensitivity, specificity, positive and negative predictive values when related to women voiding ≥ 2 times per night. Results: Complete bladder diaries were obtained from 1398 women, over 6 years, with a mean age of 57 years. Prevalence varied across the definitions from 21.5% (absolute definition) to 77% (relative definition). Sensitivity ranged from 43% (absolute) to 87% (relative). The definitions that showed the highest combined sensitivity and specificity were the functional definitions. Conclusion: From this study it is clear that more work needs to be done to arrive at a consensus for defining NP to enable accurate diagnosis and development of treatment pathways. We propose that a relative definition may provide a more clinically relevant method of defining NP.

Introduction and hypothesis The IUGA special interest group (SIG) identified a need for a minimum data set (MDS) to inform outcome measurements to be included and simplify data capture and standardise reporting for data collection systems. To define a minimum data set for urogynaecological surgical registries. Methods Existing registries provide an inventory of items. A modified Delphi approach was used to identify a MDS. At each stage reviewers ranked data points and used free text to comment. The rating used a scale of 0–10 at each review and a traffic light system rated the scores as desirable, highly desirable and mandatory. The scores were collated and reported back to clinicians prior to the further rounds. Outliers were highlighted and reviewers re-assessed prior to repeating the process. A comparison of the MDS was made with published outcomes. Results Reviewers were from the outcome SIG with emphasis on widespread representation. Fifteen clinicians from eight countries were involved. Four reviewers dissected the existing databases. Eighty data points were considered in four categories, background, preoperative, intraoperative and postoperative. Consensus was reached by the third round. Two points were added on review (date of surgery and urodynamics). Three background points, five preoperative points, seven intraoperative points and nine postoperative points were identified giving 24 minimum data points in the final recommendation. Conclusions An MDS has been developed for urogynaecological surgical registries. These should be mandatory points which then allow larger varying points to be assessed. These points correspond well to data points used in published papers from established databases.