@article{46da24f31222417b8dab3cd925e035a8, title = "The development and validation of a scoring tool to predict the operative duration of elective laparoscopic cholecystectomy", abstract = "Background: The ability to accurately predict operative duration has the potential to optimise theatre efficiency and utilisation, thus reducing costs and increasing staff and patient satisfaction. With laparoscopic cholecystectomy being one of the most commonly performed procedures worldwide, a tool to predict operative duration could be extremely beneficial to healthcare organisations. Methods: Data collected from the CholeS study on patients undergoing cholecystectomy in UK and Irish hospitals between 04/2014 and 05/2014 were used to study operative duration. A multivariable binary logistic regression model was produced in order to identify significant independent predictors of long (> 90 min) operations. The resulting model was converted to a risk score, which was subsequently validated on second cohort of patients using ROC curves. Results: After exclusions, data were available for 7227 patients in the derivation (CholeS) cohort. The median operative duration was 60 min (interquartile range 45–85), with 17.7% of operations lasting longer than 90 min. Ten factors were found to be significant independent predictors of operative durations > 90 min, including ASA, age, previous surgical admissions, BMI, gallbladder wall thickness and CBD diameter. A risk score was then produced from these factors, and applied to a cohort of 2405 patients from a tertiary centre for external validation. This returned an area under the ROC curve of 0.708 (SE = 0.013, p < 0.001), with the proportions of operations lasting > 90 min increasing more than eightfold from 5.1 to 41.8% in the extremes of the score. Conclusion: The scoring tool produced in this study was found to be significantly predictive of long operative durations on validation in an external cohort. As such, the tool may have the potential to enable organisations to better organise theatre lists and deliver greater efficiencies in care.", keywords = "Laparoscopic cholecystectomy, Operative duration, Patient factors, Prediction, Scoring tool, Theatre utilisation", author = "Reshma Bharamgoudar and Aniket Sonsale and James Hodson and Ewen Griffiths and Vohra, {Ravinder S.} and Kirkham, {Amanda J.} and Sandro Pasquali and Paul Marriott and Marianne Johnstone and Philip Spreadborough and Derek Alderson and Griffiths, {Ewen A.} and Stephen Fenwick and Mohamed Elmasry and Nunes, {Quentin M.} and David Kennedy and Khan, {Raja Basit} and Khan, {Muhammad A.S.} and Magee, {Conor J.} and Jones, {Steven M.} and Denise Mason and Parappally, {Ciny P.} and Pawan Mathur and Michael Saunders and Sara Jamel and Haque, {Samer Ul} and Sara Zafar and Shiwani, {Muhammad Hanif} and Nehemiah Samuel and Farooq Dar and Jonathan Heath and Blazeby, {Jane M.} and McNair, {Angus G.K.} and Joanna Reed and Shabuddin Khan and Robinson, {Steven J.} and Dwerryhouse, {Simon J.} and Higgs, {Simon M.} and Old, {Oliver J.} and Lucinda Frank and Jones, {Robert P.} and Roberts, {Geoffrey P.} and Adam Chambers and Alistair Reid and James Gardner-Thorpe and Jack Martin and Adam Chambers and Benjamin Knight and Richard Krysztopik and James Kynaston and {On Behalf Of The Choles Study Group, West Midlands Research Collaborative}", year = "2018", month = jan, day = "16", doi = "10.1007/s00464-018-6030-6", language = "English", volume = "32", pages = "1--9", journal = "Surgical Endoscopy", issn = "0930-2794", publisher = "Springer US", number = "7", }