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BMC Cancer (2024) 24:870 BMC Cancer  \n[https://doi.org/10.1186/s12885-024-12477-2](https://doi.org/10.1186/s12885-024-12477-2)  \nRESEARCH Open Access  \nData quality in Brazilian population-based cancer registries for gastrointestinal cancers  \nDiego Rodrigues Mendonça e Silva 1,2*, Max Moura de Oliveira3 and Maria Paula Curado 1,2,4*  \nAbstract  \nBackground Population-based cancer registries (PBCRs) are the primary source of information for cancer surveillance and monitoring. Currently, there are 30 active PBCRs in Brazil. The objective of this study was to analyze the data quality of five gastrointestinal cancers (esophagus, stomach, colorectal, liver, and pancreas) according to the criteria of comparability, validity, completeness, and timeliness in Brazilian cancer registries.  \nMethods This study included data from Brazilian PBCRs with more than ten years of historical data starting in the year 2000, regardless of the type of defined geographical coverage (state, metropolitan region, or capital), totaling 16 registries. Brazilian PBCRs were evaluated based on four international data quality criteria: comparability, validity (accuracy), completeness, and timeliness. All cancer cases were analyzed, except for nonmelanoma skin cancer cases (C44) and five gastrointestinal tumors (esophageal cancer, stomach cancer, colorectal cancer, liver cancer, and pancreatic cancer) per cancer registry and sex, according to the available period.  \nResults The 16 Brazilian PBCRs represent 17% of the population (36 million inhabitants in 2021) according to  \ndata from 2000 to 2018. There was a variation in the incidence in the historical series ranging from 12 to 19 years. The proportion of morphologically verified (MV%) cases varied from 74. 3%(Manaus) to 94 . 8%(Aracaju), and the proportion of incidentally reported death certificate only (DCO%) cases varied from 3. 0%(São Paulo) to 23 . 9%(Espírito Santo) . High-lethal ity malignant neoplasms, such as liver and pancreas, had DCO percentages greater than 30% inmost cancer registries. The sixteen registries have more than a 48-month delay in data release compared to the 2022 calendar year.  \nConclusion The studied Brazilian cancer registries met international comparability criteria; however, half of the registries showed indices below the expected levels for validity and completeness criteria for high-lethal ity tumors such as liver and pancreas tumors, in addition to a long delay in data availability and disclosure. Significant efforts are necessary to ensure the operational and stability of the PBCR in Brazil, which continues to be a tool for monitoring cancer incidence and assessing national cancer control policies.  \nKeywords Incidence, Data quality, Monitoring, Epidemiological surveillance  \n*Correspondence:  \nDiego Rodrigues Mendonça e Silva [diego. rmesilva@gmail.com](diego. rmesilva@gmail.com)  \nMaria Paula Curado [mp.curado@gmail.com](mp.curado@gmail.com)  \n1Postgraduate Program in Epidemiology, School of Public Health, University of São Paulo, São Paulo, SP, Brazil  \n2Hospital Cancer Registry, A. C. Camargo Cancer Center, São Paulo, SP, Brazil  \n3Department of Collective Health, Institute of Tropical Pathology and Public Health, Federal University of Goias, Goiânia, GO, Brazil  \n4Group of Epidemiology and Statistics on Cancer, A. C. Camargo Cancer Center, São Paulo, SP, Brazil  \n© The Author(s) 2024. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s","cbCaii3JqMXHihFi","https://ap.wps.com/l/cbCaii3JqMXHihFi","pdf",2579932,14,"English","# Abstract\n# Background\n# Methods\n# Results\n# Conclusion","[{\"question\":\"What is the main objective of this study?\",\"answer\":\"To analyze the data quality of five gastrointestinal cancers in Brazilian population-based cancer registries using international criteria.\"},{\"question\":\"Which data quality criteria were used?\",\"answer\":\"Comparability, validity (accuracy), completeness, and timeliness.\"},{\"question\":\"How many Brazilian registries and which cancers were evaluated?\",\"answer\":\"Sixteen PBCRs were evaluated for esophageal, stomach, colorectal, liver, and pancreatic cancers (with specific exclusions noted in the study).\"}]","Data quality in Brazilian population-based cancer registries for gastrointestinal cancers | PDF",1789991019,35,{"code":4,"msg":82,"data":100},[101,105,109,113,118,123,128,131,136,139,143],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":102,"show_sort_weight":103,"slug":104},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":110,"show_sort_weight":111,"slug":112},"Exam",70,"exam",{"id":114,"doc_module":4,"doc_module_name":25,"category_name":115,"show_sort_weight":116,"slug":117},5,"Comic",60,"comic",{"id":119,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":121,"slug":122},6,"Technology",50,"technology",{"id":124,"doc_module":4,"doc_module_name":25,"category_name":125,"show_sort_weight":126,"slug":127},7,"Healthcare",40,"healthcare",{"id":86,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":129,"slug":130},30,"research-report",{"id":132,"doc_module":4,"doc_module_name":25,"category_name":133,"show_sort_weight":134,"slug":135},9,"Religion & Spirituality",20,"religion-spirituality",{"id":134,"doc_module":4,"doc_module_name":25,"category_name":137,"show_sort_weight":134,"slug":138},"World Cup","world-cup",{"id":140,"doc_module":4,"doc_module_name":25,"category_name":141,"show_sort_weight":140,"slug":142},10,"Lifestyle","lifestyle",{"id":144,"doc_module":4,"doc_module_name":25,"category_name":145,"show_sort_weight":114,"slug":146},19,"General","general"]