An observational study in Ureteral Calculi, sponsored by The First Hospital of Jilin University. Completed at 1 site in China. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2026-10-01.
Sponsored by The First Hospital of Jilin University · Observational
This is an observational studyincluding an internal retrospectivedevelopment cohort, an internalprospective temporal validation cohortand two external validation cohorts fromtwo independent external centers. Thestudy aims to identify independent riskfactors for inflammatory ureteral polypsin patients with ureteral calculi anddevelop a preoperative predictive model
Retrospective clinical and radiologicaldata were extracted from eligiblepatients treated from January 1, 2018to December 31, 2025 (n=874). Theprospective cohort consecutivelyenrolled participants from April 72026, to September 7, 2026 (n=162)Consecutive eligible patients from twoexternal centers were included forexternal validation (n=139 and n=176).The primary outcome is theintraoperative diagnosis of inflammatoryureteral polyps
This is a mixedretrospective-prospective observationalcohort study. The internal retrospectivedevelopment cohort (n=874) was fullyenrolled from January 1, 2018, toDecember 31, 2025, and was further splitinto a 70% training set and a 30%model-selection holdout set. Theinternal prospective temporal validationcohort consecutively enrolled eligibleparticipants from April 7, 2026, toSeptember 7, 2026 (n=162). Twoindependent external validation cohortsfrom two separate centers includedconsecutively enrolled patients withureteral calculi (n=139 and n=176)Preoperative clinical and radiologicaldata were collected to screenindependent risk factors and build apreoperative predictive model forinflammatory ureteral polyps. Theprimary endpoint was intraoperativediagnosis of inflammatory ureteralpolyps.
50 studies on the registry are indexed under Ureteral Calculi; 14 are open to participants now.
Browse Ureteral Calculi studies →The First Hospital of Jilin University is the lead sponsor of 185 studies on the registry; 96 are open to participants now.
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The study population includes adult patients with ureteral calculi who underwent ureteroscopic treatment. The retrospective patients were enrolled at the First Hospital of Jilin University between 2018 and 2025. The prospective cohort consecutively enrolled new patients for validation between April 7 and September 7, 2026. Two additional independent external centers retrospectively collected consecutive eligible patients with ureteral calculi for external validation.
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Exclusion Criteria:
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Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
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Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Model development cohort, including aninternal retrospective developmentsubset (Jan 1, 2018-Dec 31, 2025, n=874split into training and holdout set) andan internal prospective temporalvalidation subset (Apr 7, 2026-Sep 7,2026, n=162) from the First Hospital of Jilin University.
External validation cohort, consisting of consecutively enrolled eligible patients with ureteral calculi retrospectively collected from two independent external centers: Shanghai Changhai Hospital (Jan 1 - Sep 11, 2026, n=139) and The Second Hospital of Tianjin Medical University (Jan 1 - Jul 31, 2026, n=176).
Number of Participants with Intraoperatively Confirmed Inflammatory Ureteral Polyps
The primary outcome is the presence or absence of inflammatory ureteral polyps confirmed by intraoperative pathology or direct visualization during ureteroscopy.
Time frame: At the time of ureteroscopic surgery
Ran from Jan 2018 to primary completion in Sep 2026, 104 months.
Since we started tracking on Sep 25, 2026, the dates moved once, on Oct 1, 2026: primary completion Feb 2027 → Sep 2026 and completion Feb 2027 → Sep 2026.
Earlier changes are on the record history on ClinicalTrials.gov ↗
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is completed, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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The First Hospital of Jilin University →