Introduction The development of reporting guidelines over the past 20 years represents a major advance in scholarly publishing with recent evidence showing positive impacts. Whilst over 350 reporting guidelines exist, there are few that are specific to surgery. Here we describe the development of the STROCSS guideline (Strengthening the Reporting of Cohort Studies in Surgery). Methods and analysis We published our protocol apriori. Current guidelines for case series (PROCESS), cohort studies (STROBE) and randomised controlled trials (CONSORT) were analysed to compile a list of items which were used as baseline material for developing a suitable checklist for surgical cohort guidelines. These were then put forward in a Delphi consensus exercise to an expert panel of 74 surgeons and academics via Google Forms. Results The Delphi exercise was completed by 62% (46/74) of the participants. All the items were passed in a single round to create a STROCSS guideline consisting of 17 items. Conclusion We present the STROCSS guideline for surgical cohort, cross-sectional and case-control studies consisting of a 17-item checklist. We hope its use will increase the transparency and reporting quality of such studies. This guideline is also suitable for cross-sectional and case control studies. We encourage authors, reviewers, journal editors and publishers to adopt these guidelines.

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BackgroundPatients presenting in the emergency room with flank pain suggestive of acute ureteric colic may have alternative underlying conditions mimicking ureteric stones. An early diagnosis and appropriate treatment for other causes of flank pain is important. The majority of centers around the world are increasingly using un-enhanced helical CT (UHCT) for evaluation of ureteric colic. This study was conducted to determine the incidence and spectrum of significant incidental diagnoses established or suggested on UHCT performed for suspected renal/ureteric colic.MethodsUrologist and radiologist reviewed 233 consecutive UHCT, performed for suspected renal/ureteral colic along with assessment of the medical records. Radiological diagnoses of clinical entities not suspected otherwise were analyzed. All other relevant radiological, biochemical and serological investigations and per-operative findings were also noted.ResultsUreteral calculi were identified in 148 examinations (64%), findings of recent passage of calculi in 10 (4%) and no calculus in 75 examinations (32%). Overall the incidental findings (additional or alternative diagnosis) were found in 28 (12%) CT scans. Twenty (71%) of these diagnoses were confirmed by per-operative findings, biopsy, and other radiological and biochemical investigations or on clinical follow up.ConclusionA wide spectrum of significant incidental diagnoses can be identified on UHCT performed for suspected renal/ureteral colic. In the present series of 233 consecutive CT examinations, the incidence of incidental diagnosis was 12%.

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