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{'hasResults': False, 'derivedSection': {'miscInfoModule': {'versionHolder': '2025-12-24'}, 'conditionBrowseModule': {'meshes': [{'id': 'D010190', 'term': 'Pancreatic Neoplasms'}], 'ancestors': [{'id': 'D004067', 'term': 'Digestive System Neoplasms'}, {'id': 'D009371', 'term': 'Neoplasms by Site'}, {'id': 'D009369', 'term': 'Neoplasms'}, {'id': 'D004701', 'term': 'Endocrine Gland Neoplasms'}, {'id': 'D004066', 'term': 'Digestive System Diseases'}, {'id': 'D010182', 'term': 'Pancreatic Diseases'}, {'id': 'D004700', 'term': 'Endocrine System Diseases'}]}, 'interventionBrowseModule': {'meshes': [{'id': 'D016577', 'term': 'Pancreaticoduodenectomy'}], 'ancestors': [{'id': 'D013505', 'term': 'Digestive System Surgical Procedures'}, {'id': 'D013514', 'term': 'Surgical Procedures, Operative'}]}}, 'protocolSection': {'designModule': {'studyType': 'OBSERVATIONAL', 'designInfo': {'timePerspective': 'RETROSPECTIVE', 'observationalModel': 'COHORT'}, 'enrollmentInfo': {'type': 'ACTUAL', 'count': 5910}, 'patientRegistry': False}, 'statusModule': {'overallStatus': 'COMPLETED', 'startDateStruct': {'date': '2004-01-01', 'type': 'ACTUAL'}, 'expandedAccessInfo': {'hasExpandedAccess': False}, 'statusVerifiedDate': '2018-09', 'completionDateStruct': {'date': '2018-09-01', 'type': 'ACTUAL'}, 'lastUpdateSubmitDate': '2018-09-04', 'studyFirstSubmitDate': '2018-09-04', 'studyFirstSubmitQcDate': '2018-09-04', 'lastUpdatePostDateStruct': {'date': '2018-09-06', 'type': 'ACTUAL'}, 'studyFirstPostDateStruct': {'date': '2018-09-06', 'type': 'ACTUAL'}, 'primaryCompletionDateStruct': {'date': '2013-12-13', 'type': 'ACTUAL'}}, 'outcomesModule': {'primaryOutcomes': [{'measure': 'median OS', 'timeFrame': 'to 2013 Dec. 31', 'description': 'The median overall survival of all patients'}]}, 'oversightModule': {'oversightHasDmc': False, 'isFdaRegulatedDrug': False, 'isFdaRegulatedDevice': False}, 'conditionsModule': {'keywords': ['pancreatic ductal adenocarcinoma', 'pancreaticoduodenectomy'], 'conditions': ['Pancreas Cancer']}, 'descriptionModule': {'briefSummary': 'We used the SEER database to analyze the data of patients with PDAC. The database includes patients of 18 registries in the USA from 1973-2013All the malignant cases were followed-up annually to determine vital status.\n\nThe aim of Our study is to make clearly the long-term survival of younger (age \\<80 years) and elderly (age ≥80 years) pancreatic cancer patients underwent PD. Sec-ond, find out the risk factors of poor prognosis in elderly patients.', 'detailedDescription': "Database We used the SEER database to analyze the data of patients with PDAC. The database includes patients of 18 registries in the USA from 1973-2013, encompassing approxi-mately 28% of the USA population. All the malignant cases were followed-up annu-ally to determine vital status.\n\nPatient Population All the variables' definitions are encoded in the SEER database. To identify the PDAC cases, site codes (C25 pancreas, C25.0-C25.9) and histology codes (8140 adenocarcinoma, 8500 infiltrating duct carcinoma) based on the International Classification of Diseases for Oncology, Third Edition (ICD-O-3) were used.11 Only cases that underwent PD and microscopically confirmed were included.\n\nOutcome Variables We only included those PDAC patients that underwent PD with precise data available for the following variables: age at diagnosis, year of diagnosis, gender, race, tumor site, tumor size, regional nodes positive, regional nodes examined, grade, stage, vital status, and survival months.\n\nTo clearly differentiate the difference of long-term survival between young and elderly patients, all cases were divided into two group age \\< 80 years and age ≥ 80 years. Since 2004, the AJCC 6th stage has been used in the SEER database. Thus, the diagnosis years of the cases included in our study ranged from 2004-2013. To analyze the median OS between different time periods, we divided the year of diagnosis into two groups: 2004-2008 year and 2009-2013. Furthermore, we also divided the tumor size into three groups: ≤ 2 cm, 2-4 cm, and \\> 4 cm. The lymph node ratio (LNR) is considered a robust prognostic factor after resection of pancreatic cancer and was es-timated using regional nodes positive divided by regional nodes examined.15 LNR was then categorized into three groups: 0%, 1-50%, \\> 50%."}, 'eligibilityModule': {'sex': 'ALL', 'stdAges': ['CHILD', 'ADULT', 'OLDER_ADULT'], 'samplingMethod': 'NON_PROBABILITY_SAMPLE', 'studyPopulation': 'Pancreatic ductal adenocarcinoma patients in the SEER database form 2003 to 2013.', 'eligibilityCriteria': 'Inclusion Criteria:\n\n* Patients with pancreatic ductal adenocarcinoma,treatment by pancreaticoduodenectomy.Only cases that underwent PD and microscopically confirmed were included.\n\nExclusion Criteria:\n\n* Patients with no survival data.'}, 'identificationModule': {'nctId': 'NCT03659903', 'briefTitle': 'Pancreaticoduodenectomy in Elderly Pancreatic Ductal Adenocarcinoma Patients', 'organization': {'class': 'OTHER', 'fullName': 'The First Affiliated Hospital of Dalian Medical University'}, 'officialTitle': 'Long-term Benefit of Elderly Pancreatic Ductal Adenocarcinoma Patients After Pancreaticoduodenectomy', 'orgStudyIdInfo': {'id': 'YJ-KY-FB-2017-06'}}, 'armsInterventionsModule': {'armGroups': [{'label': 'younger patients (age < 80)', 'description': "age \\< 80 patients, All the variables' definitions are encoded in the SEER database. To identify the PDAC cases, site codes (C25 pancreas, C25.0-C25.9) and histology codes (8140 adenocarcinoma, 8500 infiltrating duct carcinoma) based on the International Classification of Diseases for Oncology, Third Edition (ICD-O-3) were used.11 Only cases that underwent PD and microscopically confirmed were included.", 'interventionNames': ['Procedure: pancreaticoduodenectomy']}, {'label': 'older patients (age≥ 80 )', 'description': "age ≥ 80 years-old patients,All the variables' definitions are encoded in the SEER database. To identify the PDAC cases, site codes (C25 pancreas, C25.0-C25.9) and histology codes (8140 adenocarcinoma, 8500 infiltrating duct carcinoma) based on the International Classification of Diseases for Oncology, Third Edition (ICD-O-3) were used.11 Only cases that underwent PD and microscopically confirmed were included.", 'interventionNames': ['Procedure: pancreaticoduodenectomy']}], 'interventions': [{'name': 'pancreaticoduodenectomy', 'type': 'PROCEDURE', 'description': 'pancreaticoduodenectomy', 'armGroupLabels': ['older patients (age≥ 80 )', 'younger patients (age < 80)']}]}, 'ipdSharingStatementModule': {'ipdSharing': 'NO'}, 'sponsorCollaboratorsModule': {'leadSponsor': {'name': 'The First Affiliated Hospital of Dalian Medical University', 'class': 'OTHER'}, 'responsibleParty': {'type': 'SPONSOR'}}}}