1
|
Metaxas G, Papachristou A, Stathaki M. Colorectal cancer screening: Modalities and adherence. World J Gastroenterol 2024; 30:3048-3051. [PMID: 38983962 PMCID: PMC11230065 DOI: 10.3748/wjg.v30.i24.3048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 05/18/2024] [Accepted: 06/11/2024] [Indexed: 06/25/2024] Open
Abstract
In the last decade, several studies have explored various modalities and strategies for colorectal cancer (CRC) screening, taking into account epidemiological data, individual characteristics, and socioeconomic factors. In this editorial, we comment further on a retrospective study by Agatsuma et al published in the recent issue of the World Journal of Gastroenterology. Our focus is on screening trends, particularly in relation to efforts to improve the currently suboptimal uptake among the general population worldwide, aiming to enhance early diagnosis rates of CRC. There is a need to raise awareness through health edu-cation programs and to consider the use of readily available, non-invasive screening methods. These strategies are crucial for attracting screen-eligible populations to participate in first-line screening, especially those in high- or average-risk groups and in regions with limited resources. Liquid biopsies and biomarkers represent rapidly evolving trends in screening and diagnosis; however, their clinical relevance has yet to be standardized.
Collapse
Affiliation(s)
- Georgios Metaxas
- Department of Surgery, Elena Venizelou Hospital, Athens 11521, Greece
| | | | - Martha Stathaki
- Department of Surgery, Elena Venizelou Hospital, Athens 11521, Greece
| |
Collapse
|
2
|
Kovačević IN, Vujović A, Stanišić M, Vuković-Leković J, Lansdorp-Vogelaar I, Mlakar DN, Senore C, Józwiak-Hagymásy J, Széles G, Vokó Z, Csanádi M. Roadmap to improve the organized cancer screening programs - The case of colorectal cancer screening in Montenegro. J Cancer Policy 2024; 39:100464. [PMID: 38104712 DOI: 10.1016/j.jcpo.2023.100464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 12/01/2023] [Accepted: 12/12/2023] [Indexed: 12/19/2023]
Abstract
BACKGROUND Implementation of organized cancer screening programs comes with many challenges and barriers, which may inhibit the achievement of the screening activities' desired benefits. In this paper we outline a plan for improving the colorectal cancer (CRC) screening system in Montenegro. METHODS We formulated a roadmap, which was generally defined as a country-specific strategic plan to improve cancer screening programs. The roadmap development was an iterative, step-by-step process. First, we described the current screening program, then identified and described key barriers, and finally proposed actions to overcome them. Multiple sources of information (e.g., documents, expert opinions) were collected and processed by local and international stakeholders. RESULTS The CRC screening program was implemented between 2013-2019 by gradually increasing the invitation of the target population. Key barriers of the implementation were defined: 1) Lack of colonoscopy capacity in the northern part of the country; 2) Inadequate information technology systems; 3) Inadequate public promotion of screening. The defined actions were related to overcoming lack of available resources (e.g., financial, human and technological), to improve the policy environment and the knowledge, and to facilitate information sharing. CONCLUSION The collaboration between local stakeholders of CRC screening and researchers experienced in planning and evaluating screening programs resulted in the first comprehensive description of CRC screening in Montenegro, detailed understanding of key barriers that emerged during implementation and a carefully designed list of actions. The implementation of these actions and the evaluation of whether barriers were solved will be captured in the upcoming period by maintaining this collaboration.
Collapse
Affiliation(s)
| | | | | | | | - Iris Lansdorp-Vogelaar
- Department of Public Health, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
| | | | - Carlo Senore
- Epidemiology and screening Unit - CPO, University Hospital Città della Salute e della Scienza, Turin, Italy
| | | | | | - Zoltán Vokó
- Syreon Research Institute, Budapest, Hungary; Center for Health Technology Assessment, Semmelweis University, Budapest, Hungary.
| | | |
Collapse
|
3
|
Klimeck L, Heisser T, Hoffmeister M, Brenner H. Colorectal cancer: A health and economic problem. Best Pract Res Clin Gastroenterol 2023; 66:101839. [PMID: 37852707 DOI: 10.1016/j.bpg.2023.101839] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 05/17/2023] [Indexed: 10/20/2023]
Abstract
Colorectal Cancer (CRC) is the third most commonly diagnosed form of cancer and accounts for approximately 1.9 million cancer cases each year (10% of all new cancer cases globally). Incidence strongly increases with age and has been traditionally highest in Western, affluent countries, but it is rapidly increasing in many less developed countries and in younger generations in both developed and developing countries. With demographic aging, CRC will pose a rapidly increasing challenge for many societies, which underlines the need for major efforts on primary and secondary prevention. A number of effective screening options are available, and implementation of well-organized screening programs could have a major impact on lowering the future burden of the disease.
Collapse
Affiliation(s)
- Leon Klimeck
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Thomas Heisser
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Michael Hoffmeister
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany; Division of Preventive Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany; German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.
| |
Collapse
|
4
|
Messmann H, Bisschops R, Antonelli G, Libânio D, Sinonquel P, Abdelrahim M, Ahmad OF, Areia M, Bergman JJGHM, Bhandari P, Boskoski I, Dekker E, Domagk D, Ebigbo A, Eelbode T, Eliakim R, Häfner M, Haidry RJ, Jover R, Kaminski MF, Kuvaev R, Mori Y, Palazzo M, Repici A, Rondonotti E, Rutter MD, Saito Y, Sharma P, Spada C, Spadaccini M, Veitch A, Gralnek IM, Hassan C, Dinis-Ribeiro M. Expected value of artificial intelligence in gastrointestinal endoscopy: European Society of Gastrointestinal Endoscopy (ESGE) Position Statement. Endoscopy 2022; 54:1211-1231. [PMID: 36270318 DOI: 10.1055/a-1950-5694] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
This ESGE Position Statement defines the expected value of artificial intelligence (AI) for the diagnosis and management of gastrointestinal neoplasia within the framework of the performance measures already defined by ESGE. This is based on the clinical relevance of the expected task and the preliminary evidence regarding artificial intelligence in artificial or clinical settings. MAIN RECOMMENDATIONS:: (1) For acceptance of AI in assessment of completeness of upper GI endoscopy, the adequate level of mucosal inspection with AI should be comparable to that assessed by experienced endoscopists. (2) For acceptance of AI in assessment of completeness of upper GI endoscopy, automated recognition and photodocumentation of relevant anatomical landmarks should be obtained in ≥90% of the procedures. (3) For acceptance of AI in the detection of Barrett's high grade intraepithelial neoplasia or cancer, the AI-assisted detection rate for suspicious lesions for targeted biopsies should be comparable to that of experienced endoscopists with or without advanced imaging techniques. (4) For acceptance of AI in the management of Barrett's neoplasia, AI-assisted selection of lesions amenable to endoscopic resection should be comparable to that of experienced endoscopists. (5) For acceptance of AI in the diagnosis of gastric precancerous conditions, AI-assisted diagnosis of atrophy and intestinal metaplasia should be comparable to that provided by the established biopsy protocol, including the estimation of extent, and consequent allocation to the correct endoscopic surveillance interval. (6) For acceptance of artificial intelligence for automated lesion detection in small-bowel capsule endoscopy (SBCE), the performance of AI-assisted reading should be comparable to that of experienced endoscopists for lesion detection, without increasing but possibly reducing the reading time of the operator. (7) For acceptance of AI in the detection of colorectal polyps, the AI-assisted adenoma detection rate should be comparable to that of experienced endoscopists. (8) For acceptance of AI optical diagnosis (computer-aided diagnosis [CADx]) of diminutive polyps (≤5 mm), AI-assisted characterization should match performance standards for implementing resect-and-discard and diagnose-and-leave strategies. (9) For acceptance of AI in the management of polyps ≥ 6 mm, AI-assisted characterization should be comparable to that of experienced endoscopists in selecting lesions amenable to endoscopic resection.
Collapse
Affiliation(s)
- Helmut Messmann
- III Medizinische Klinik, Universitatsklinikum Augsburg, Augsburg, Germany
| | - Raf Bisschops
- Department of Gastroenterology and Hepatology, Catholic University of Leuven (KUL), TARGID, University Hospital Leuven, Leuven, Belgium
| | - Giulio Antonelli
- Gastroenterology and Digestive Endoscopy Unit, Ospedale dei Castelli Hospital, Ariccia, Rome, Italy
- Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, Sapienza University of Rome, Italy
| | - Diogo Libânio
- Department of Gastroenterology, Porto Comprehensive Cancer Center, and RISE@CI-IPOP (Health Research Network), Porto, Portugal
- MEDCIDS, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Pieter Sinonquel
- Department of Gastroenterology and Hepatology, Catholic University of Leuven (KUL), TARGID, University Hospital Leuven, Leuven, Belgium
| | - Mohamed Abdelrahim
- Endoscopy Department, Portsmouth Hospitals University NHS Trust, Portsmouth, UK
| | - Omer F Ahmad
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London Hospital, London, UK
- Division of Surgery and Interventional Sciences, University College London Hospital, London, UK
- Gastrointestinal Services, University College London Hospital, London, UK
| | - Miguel Areia
- Gastroenterology Department, Portuguese Oncology Institute of Coimbra, Coimbra, Portugal
| | | | - Pradeep Bhandari
- Endoscopy Department, Portsmouth Hospitals University NHS Trust, Portsmouth, UK
| | - Ivo Boskoski
- Digestive Endoscopy Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
| | - Evelien Dekker
- Department of Gastroenterology and Hepatology, Amsterdam UMC, Amsterdam, The Netherlands
| | - Dirk Domagk
- Department of Medicine I, Josephs-Hospital Warendorf, Academic Teaching Hospital, University of Muenster, Warendorf, Germany
| | - Alanna Ebigbo
- III Medizinische Klinik, Universitatsklinikum Augsburg, Augsburg, Germany
| | - Tom Eelbode
- Department of Electrical Engineering (ESAT/PSI), Medical Imaging Research Center, KU Leuven, Leuven, Belgium
| | - Rami Eliakim
- Department of Gastroenterology, Sheba Medical Center Tel Hashomer & Sackler School of Medicine, Tel-Aviv University, Ramat Gan, Israel
| | - Michael Häfner
- 2nd Medical Department, Barmherzige Schwestern Krankenhaus, Vienna, Austria
| | - Rehan J Haidry
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London Hospital, London, UK
- Division of Surgery and Interventional Sciences, University College London Hospital, London, UK
| | - Rodrigo Jover
- Servicio de Gastroenterología, Hospital General Universitario Dr. Balmis, Instituto de Investigación Biomédica de Alicante ISABIAL, Departamento de Medicina Clínica, Universidad Miguel Hernández, Alicante, Spain
| | - Michal F Kaminski
- Clinical Effectiveness Research Group, University of Oslo, Oslo, Norway
- Department of Gastroenterology, Hepatology and Clinical Oncology, Centre of Postgraduate Medical Education, Warsaw, Poland
- Department of Oncological Gastroenterology and Department of Cancer Prevention, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland
| | - Roman Kuvaev
- Endoscopy Department, Yaroslavl Regional Cancer Hospital, Yaroslavl, Russian Federation
- Department of Gastroenterology, Faculty of Additional Professional Education, N.A. Pirogov Russian National Research Medical University, Moscow, Russian Federation
| | - Yuichi Mori
- Clinical Effectiveness Research Group, University of Oslo, Oslo, Norway
- Digestive Disease Center, Showa University Northern Yokohama Hospital, Yokohama, Japan
| | | | - Alessandro Repici
- Department of Biomedical Sciences, Humanitas University, Rozzano, Milan, Italy
- IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | | | - Matthew D Rutter
- North Tees and Hartlepool NHS Foundation Trust, Stockton-on-Tees, UK
- Population Health Sciences Institute, Newcastle University, Newcastle, UK
| | - Yutaka Saito
- Endoscopy Division, National Cancer Center Hospital, Tokyo, Japan
| | - Prateek Sharma
- Gastroenterology and Hepatology Division, University of Kansas School of Medicine, Kansas, USA
- Kansas City VA Medical Center, Kansas City, USA
| | - Cristiano Spada
- Digestive Endoscopy Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy
- Digestive Endoscopy, Fondazione Poliambulanza Istituto Ospedaliero, Brescia, Italy
| | - Marco Spadaccini
- Department of Biomedical Sciences, Humanitas University, Rozzano, Milan, Italy
- IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Andrew Veitch
- Department of Gastroenterology, Royal Wolverhampton Hospitals NHS Trust, Wolverhampton, UK
| | - Ian M Gralnek
- Ellen and Pinchas Mamber Institute of Gastroenterology and Hepatology, Emek Medical Center, Afula, Israel
- Rappaport Faculty of Medicine, Technion Israel Institute of Technology, Haifa, Israel
| | - Cesare Hassan
- Department of Biomedical Sciences, Humanitas University, Rozzano, Milan, Italy
- IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Mario Dinis-Ribeiro
- Department of Gastroenterology, Porto Comprehensive Cancer Center, and RISE@CI-IPOP (Health Research Network), Porto, Portugal
| |
Collapse
|
5
|
Hassan C, Balsamo G, Lorenzetti R, Zullo A, Antonelli G. Artificial Intelligence Allows Leaving-In-Situ Colorectal Polyps. Clin Gastroenterol Hepatol 2022; 20:2505-2513.e4. [PMID: 35835342 DOI: 10.1016/j.cgh.2022.04.045] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/22/2022] [Accepted: 04/26/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Artificial Intelligence (AI) could support cost-saving strategies for colonoscopy because of its accuracy in the optical diagnosis of colorectal polyps. However, AI must meet predefined criteria to be implemented in clinical settings. METHODS An approved computer-aided diagnosis (CADx) module for differentiating between adenoma and nonadenoma in unmagnified white-light colonoscopy was used in a consecutive series of colonoscopies. For each polyp, CADx output and subsequent endoscopist diagnosis with advanced imaging were matched against the histology gold standard. The primary outcome was the negative predictive value (NPV) of CADx for adenomatous histology for ≤5-mm rectosigmoid lesions. We also calculated the NPV for AI-assisted endoscopist predictions, and agreement between CADx and histology-based postpolypectomy surveillance intervals according to European and American guidelines. RESULTS Overall, 544 polyps were removed in 162 patients, of which 295 (54.2%) were ≤5-mm rectosigmoid histologically verified lesions. CADx diagnosis was feasible in 291 of 295 (98.6%), and the NPV for ≤5-mm rectosigmoid lesions was 97.6% (95% CI, 94.1%-99.1%). There were 242 of 295 (82%) lesions that were amenable for a leave-in-situ strategy. Based on CADx output, 212 of 544 (39%) would be amenable to a resect-and-discard strategy, resulting in a 95.6% (95% CI, 90.8%-98.0%) and 95.9% (95% CI, 89.8%-98.4%) agreement between CADx- and histology-based surveillance intervals according to European and American guidelines, respectively. A similar NPV (97.6%; 95% CI, 94.8%-99.1%) for ≤5-mm rectosigmoids was achieved by AI-assisted endoscopists assessing polyps with electronic chromoendoscopy, with a CADx-concordant diagnosis in 97.2% of cases. CONCLUSIONS In this study, CADx without advanced imaging exceeded the benchmarks required for optical diagnosis of colorectal polyps. CADx could help implement cost-saving strategies in colonoscopy by reducing the burden of polypectomy and/or pathology. CLINICALTRIALS gov registration number: NCT04884581.
Collapse
Affiliation(s)
- Cesare Hassan
- Department of Biomedical Sciences, Humanitas University, Rozzano, Milan, Italy; Endoscopy Unit, Humanitas Clinical and Research Center IRCCS, Rozzano, Milan, Italy.
| | | | | | - Angelo Zullo
- Gastroenterology Unit, Nuovo Regina Margherita Hospital, Rome, Italy
| | - Giulio Antonelli
- Gastroenterology Unit, Nuovo Regina Margherita Hospital, Rome, Italy; Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, "Sapienza" University of Rome, Rome, Italy; Gastroenterology and Digestive Endoscopy Unit, Ospedale dei Castelli Hospital, Ariccia, Rome, Italy
| |
Collapse
|
6
|
Gheysariyeha F, Rahimi F, Tabesh E, Hemami MR, Adibi P, Rezayatmand R. Cost-effectiveness of colorectal cancer screening strategies: A systematic review. Eur J Cancer Care (Engl) 2022; 31:e13673. [PMID: 35974390 DOI: 10.1111/ecc.13673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 04/30/2022] [Accepted: 06/24/2022] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Colorectal cancer (CRC) is the second leading cause of death worldwide and the use of CRC screening tests can reduce the incidence and mortality of the disease by early detection. This study aims to review cost-effectiveness strategies in different ages and countries, systematically. METHODS We searched ProQuest, Web of Science, Scopus, Cochrane, PubMed and Embase for related studies between 2010 and 2020. Articles that reported costs per Quality-Adjusted Life Year or Life Year Gain and Incremental Cost-Effectiveness Ratios to compare the cost-effectiveness of CRC screening strategies in the average-risk population were included in our study. RESULTS The search strategies identified 426 records and finally 48 articles were included in the systematic review based on included and excluded criteria. We identified seven strategies for CRC screening. Most of the strategies were performed in aged 50-75. These studies were reported by cost per Quality-Adjusted life year (QALY)/Life Year Gain (LYG) based on methods and perspectives and the ICER of comparison of two-by-two strategies. CONCLUSION Most of the CRC screening strategies were cost-effective, but there was big heterogeneity between the cost-effectiveness analysis of CRC screening strategies because of different screening methods, perspectives and screening populations. So, it is important to consider this heterogeneity to compare the economic evaluation studies in this field.
Collapse
Affiliation(s)
- Fatemeh Gheysariyeha
- Department of Health Economics, School of Management and Medical Information Sciences Isfahan University of Medical Science, Isfahan, Iran
| | - Farimah Rahimi
- Pharmacoeconomics and Pharma Management, Research Assistant Professor, Health Management and Economics Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Elham Tabesh
- Gastroenterology and Hepatology, Isfahan Gastroenterology and Hepatology Research Center (IGHRC), Isfahan University of Medical Sciences, Isfahan, Iran
| | | | - Payman Adibi
- Gastroenterology and Hepatology, Isfahan Gastroenterology and Hepatology Research Center (IGHRC), Isfahan University of Medical Sciences, Isfahan, Iran
| | - Reza Rezayatmand
- Health Economics, Health Management and Economics Research Center Isfahan University of Medical Sciences, Isfahan, Iran
| |
Collapse
|
7
|
Popp J, Weinberg DS, Enns E, Nyman JA, Beck JR, Kuntz KM. Reevaluating the Evidence for Intensive Postoperative Extracolonic Surveillance for Nonmetastatic Colorectal Cancer. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2022; 25:36-46. [PMID: 35031098 PMCID: PMC9186065 DOI: 10.1016/j.jval.2021.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 07/19/2021] [Accepted: 07/31/2021] [Indexed: 06/14/2023]
Abstract
OBJECTIVES The FACS, GILDA, and COLOFOL trials have cast doubt on the value of intensive extracolonic surveillance for resected nonmetastatic colorectal cancer and by extension metastasectomy. We reexamined this pessimistic interpretation. We evaluate an alternative explanation: insufficient power to detect a realistically sized survival benefit that may be clinically meaningful. METHODS A microsimulation model of postdiagnosis colorectal cancer was constructed assuming an empirically plausible efficacy for metastasectomy and thus surveillance. The model was used to predict the large-sample mortality reduction expected for each trial and the implied statistical power. A potential recurrence imbalance in the FACS trial was investigated. Goodness of fit between model predictions and trial results were evaluated. Downstream life expectancy was estimated and power calculations performed for future trials evaluating surveillance and metastasectomy. RESULTS For all 3 trials, the model predicted a mortality reduction of ≤5% and power of <10%. The FACS recurrence imbalance likely led to a large relative bias (>2.5) in the hazard ratio for overall survival favoring control. After adjustment, both COLOFOL and FACS results were consistent with model predictions (P>.5). A 2.6 (95% credible interval 0.5-5.1) and 3.6 (95% credible interval 0.8-7.0) month increase in life expectancy is predicted comparing intensive extracolonic surveillance-routine computed tomography scans and carcinoembryonic antigen assays-with 1 computed tomography scan at 12 months or no surveillance, respectively. An adequately sized surveillance trial is not feasible. A metastasectomy trial should randomize at least 200 to 300 patients. CONCLUSIONS Recent trial results do not warrant de novo skepticism of metastasectomy nor targeted extracolonic surveillance. Given the potential for clinically meaningful life-expectancy gain and significant uncertainty, a trial of metastasectomy is needed.
Collapse
Affiliation(s)
- Jonah Popp
- Center for Evidence Synthesis in Health, Department of Health Services, Policy, and Practice, School of Public Health, Brown University, Providence, RI, USA.
| | - David S Weinberg
- Department of Medicine, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Eva Enns
- Division of Health Policy and Management, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - John A Nyman
- Division of Health Policy and Management, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - J Robert Beck
- Cancer Prevention and Control Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Karen M Kuntz
- Division of Health Policy and Management, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| |
Collapse
|
8
|
Obón-Santacana M, Díez-Villanueva A, Alonso MH, Ibáñez-Sanz G, Guinó E, López A, Rodríguez-Alonso L, Mata A, García-Rodríguez A, Palomo AG, Molina AJ, Garcia M, Binefa G, Martín V, Moreno V. Polygenic risk score across distinct colorectal cancer screening outcomes: from premalignant polyps to colorectal cancer. BMC Med 2021; 19:261. [PMID: 34743725 PMCID: PMC8574048 DOI: 10.1186/s12916-021-02134-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/17/2021] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Different risk-based colorectal cancer (CRC) screening strategies, such as the use of polygenic risk scores (PRS), have been evaluated to improve effectiveness of these programs. However, few studies have previously assessed its usefulness in a fecal immunochemical test (FIT)-based screening study. METHODS A PRS of 133 single nucleotide polymorphisms was assessed for 3619 participants: population controls, screening controls, low-risk lesions (LRL), intermediate-risk (IRL), high-risk (HRL), CRC screening program cases, and clinically diagnosed CRC cases. The PRS was compared between the subset of cases (n = 648; IRL+HRL+CRC) and controls (n = 956; controls+LRL) recruited within a FIT-based screening program. Positive predictive values (PPV), negative predictive values (NPV), and the area under the receiver operating characteristic curve (aROC) were estimated using cross-validation. RESULTS The overall PRS range was 110-156. PRS values increased along the CRC tumorigenesis pathway (Mann-Kendall P value 0.007). Within the screening subset, the PRS ranged 110-151 and was associated with higher risk-lesions and CRC risk (ORD10vsD1 1.92, 95% CI 1.22-3.03). The cross-validated aROC of the PRS for cases and controls was 0.56 (95% CI 0.53-0.59). Discrimination was equal when restricted to positive FIT (aROC 0.56), but lower among negative FIT (aROC 0.55). The overall PPV among positive FIT was 0.48. PPV were dependent on the number of risk alleles for positive FIT (PPVp10-p90 0.48-0.57). CONCLUSIONS PRS plays an important role along the CRC tumorigenesis pathway; however, in practice, its utility to stratify the general population or as a second test after a FIT positive result is still doubtful. Currently, PRS is not able to safely stratify the general population since the improvement on PPV values is scarce.
Collapse
Affiliation(s)
- Mireia Obón-Santacana
- Unit of Biomarkers and Suceptibility (UBS), Oncology Data Analytics Program (ODAP), Catalan Institute of Oncology (ICO), L'Hospitalet del Llobregat, 08908, Barcelona, Spain.,ONCOBELL Program, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Spain.,Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain
| | - Anna Díez-Villanueva
- Unit of Biomarkers and Suceptibility (UBS), Oncology Data Analytics Program (ODAP), Catalan Institute of Oncology (ICO), L'Hospitalet del Llobregat, 08908, Barcelona, Spain.,ONCOBELL Program, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Spain.,Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain
| | - Maria Henar Alonso
- Unit of Biomarkers and Suceptibility (UBS), Oncology Data Analytics Program (ODAP), Catalan Institute of Oncology (ICO), L'Hospitalet del Llobregat, 08908, Barcelona, Spain.,ONCOBELL Program, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Spain.,Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain
| | - Gemma Ibáñez-Sanz
- Unit of Biomarkers and Suceptibility (UBS), Oncology Data Analytics Program (ODAP), Catalan Institute of Oncology (ICO), L'Hospitalet del Llobregat, 08908, Barcelona, Spain.,ONCOBELL Program, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Spain.,Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain.,Gastroenterology Department, Bellvitge University Hospital, L'Hospitalet de Llobregat, Spain
| | - Elisabet Guinó
- Unit of Biomarkers and Suceptibility (UBS), Oncology Data Analytics Program (ODAP), Catalan Institute of Oncology (ICO), L'Hospitalet del Llobregat, 08908, Barcelona, Spain.,ONCOBELL Program, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Spain.,Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain
| | - Ana López
- Unit of Biomarkers and Suceptibility (UBS), Oncology Data Analytics Program (ODAP), Catalan Institute of Oncology (ICO), L'Hospitalet del Llobregat, 08908, Barcelona, Spain.,ONCOBELL Program, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Spain.,Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain
| | - Lorena Rodríguez-Alonso
- Gastroenterology Department, Bellvitge University Hospital, L'Hospitalet de Llobregat, Spain
| | - Alfredo Mata
- Digestive System Service, Moisés Broggi Hospital, Sant Joan Despí, Spain
| | - Ana García-Rodríguez
- Endoscopy Unit, Digestive System Service, Viladecans Hospital-IDIBELL, Viladecans, Spain
| | - Andrés García Palomo
- Servicio de Oncología, Complejo Asistencial Universitario de León, 24071, León, Spain
| | - Antonio J Molina
- The Research Group in Gene - Environment and Health Interactions (GIIGAS)/Institut of Biomedicine (IBIOMED), Universidad de León, 24071, León, Spain.,Faculty of Health Sciences, Department of Biomedical Sciences, Area of Preventive Medicine and Public Health, Universidad de León, 24071, León, Spain
| | - Montse Garcia
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain.,Cancer Screening Unit, Cancer Prevention and Control Program, Catalan Institute of Oncology, L'Hospitalet de Llobregat, Barcelona, Spain.,Early Detection of Cancer Research Group, EPIBELL Program, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Spain
| | - Gemma Binefa
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain.,Cancer Screening Unit, Cancer Prevention and Control Program, Catalan Institute of Oncology, L'Hospitalet de Llobregat, Barcelona, Spain.,Early Detection of Cancer Research Group, EPIBELL Program, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Spain
| | - Vicente Martín
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain.,The Research Group in Gene - Environment and Health Interactions (GIIGAS)/Institut of Biomedicine (IBIOMED), Universidad de León, 24071, León, Spain.,Faculty of Health Sciences, Department of Biomedical Sciences, Area of Preventive Medicine and Public Health, Universidad de León, 24071, León, Spain
| | - Victor Moreno
- Unit of Biomarkers and Suceptibility (UBS), Oncology Data Analytics Program (ODAP), Catalan Institute of Oncology (ICO), L'Hospitalet del Llobregat, 08908, Barcelona, Spain. .,ONCOBELL Program, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, 08908, Barcelona, Spain. .,Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain. .,Department of Clinical Sciences, Faculty of Medicine, University of Barcelona, 08007, Barcelona, Spain.
| |
Collapse
|
9
|
Heisser T, Weigl K, Hoffmeister M, Brenner H. Age-specific sequence of colorectal cancer screening options in Germany: A model-based critical evaluation. PLoS Med 2020; 17:e1003194. [PMID: 32678831 PMCID: PMC7367446 DOI: 10.1371/journal.pmed.1003194] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 06/26/2020] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND The current organized screening program for colorectal cancer in Germany offers both sexes 5 annual fecal immunochemical tests (FITs) between ages 50 and 54 years, followed by a first screening colonoscopy at age 55 years if all of these FITs were negative. We sought to assess the implications of this approach for key parameters of diagnostic performance. METHODS AND FINDINGS Using a multistate Markov model, we estimated the expected detection rates of advanced neoplasms (advanced adenomas and cancers) and number needed to scope (NNS) to detect 1 advanced neoplasm at a first screening colonoscopy conducted at age 55 after 5 preceding negative FITs and compared them with the corresponding estimates for a first screening colonoscopy at age 55 with no preceding FIT testing. In individuals with 5 consecutive negative FITs undergoing screening colonoscopy at age 55, expected colonoscopy detection rate (NNS) was 3.7% (27) and 0.10% (1,021) for any advanced neoplasm and cancer, respectively, in men, and 2.1% (47) and 0.05% (1,880) for any advanced neoplasm and cancer, respectively, in women. These NNS values for detecting 1 advanced neoplasm are approximately 3-fold higher, and the NNS values for detecting 1 cancer are approximately 8-fold higher, than those for a first screening colonoscopy at age 55 without prior FITs. This study is limited by model simplifying assumptions and uncertainties related to input parameters. CONCLUSIONS Screening colonoscopy at age 55 after 5 consecutive negative FITs at ages 50-54, as currently offered in the German cancer early detection program, is expected to have very low positive predictive value. Our results may inform efforts to enhance the design of screening programs.
Collapse
Affiliation(s)
- Thomas Heisser
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Medical Faculty Heidelberg, University of Heidelberg, Heidelberg, Germany
- * E-mail:
| | - Korbinian Weigl
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
- German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Michael Hoffmeister
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
- German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
- Division of Preventive Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany
| |
Collapse
|
10
|
Surveillance Intensity Comparison by Risk for T1NX Locally Excised Rectal Adenocarcinoma: a Cost-Effective Analysis. J Gastrointest Surg 2020; 24:198-208. [PMID: 31724115 DOI: 10.1007/s11605-019-04369-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 08/12/2019] [Indexed: 01/31/2023]
Abstract
BACKGROUND Controversy exists regarding the optimal surveillance strategy following local excision of T1NX rectal adenocarcinoma. This study aims to determine the cost-effectiveness of surveillance strategies for locally excised T1NX rectal adenocarcinoma based on histopathologic and local staging risk factors. METHODS A Markov model with 10-year follow-up was developed for cost-effectiveness analysis of high-, medium-, and low-intensity surveillance strategies after local excision of T1NX rectal adenocarcinoma. Literature review and expert consensus were utilized to populate state/transition probabilities and rewards. Based on this data, 87% of T1NX patients undergoing local excision were low risk. Healthcare utilization costs were based on Centers for Medicare and Medicaid Services data. The primary outcomes were costs in 2018 US dollars and effectiveness in life-years presented as net monetary benefit and incremental cost-effectiveness ratios. One-way sensitivity and probabilistic sensitivity analyses were performed. RESULTS Net monetary benefit for low-, medium-, and high-intensity surveillance strategies ($393,117.00, $397,978.80, and $397,290.00) shows medium-intensity surveillance to be optimal. One-way sensitivity analysis shows medium-intensity surveillance to be optimal when the cohort is 73-94% low risk. High-intensity surveillance is preferred when less than 73% of the cohort is low risk. Low-intensity surveillance is preferred when greater than 94% is low risk. Probabilistic sensitivity analysis of the base-case shows medium-intensity surveillance is the optimal strategy for 51.5% of the iterations performed. CONCLUSIONS Medium-intensity surveillance is the most cost-effective surveillance strategy for locally excised T1NX rectal adenocarcinoma in a clinically representative population model.
Collapse
|
11
|
Phisalprapa P, Supakankunti S, Chaiyakunapruk N. Cost-effectiveness and budget impact analyses of colorectal cancer screenings in a low- and middle-income country: example from Thailand. J Med Econ 2019; 22:1351-1361. [PMID: 31560247 DOI: 10.1080/13696998.2019.1674065] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Objectives: Colorectal cancer (CRC) screening programs have been reported to be cost-effective in many high-income countries. However, there was no such study in low- and middle-income countries. This study aimed to evaluate cost-effectiveness and budget impact of CRC screening modalities for average-risk persons in Thailand.Methods: A decision tree coupled with a Markov model was used to estimate lifetime costs and health benefits of fecal immunochemical test (FIT) and colonoscopy using a societal perspective. The input parameters were obtained from a CRC screening project at a Thai tertiary care hospital, Thai health care costs and databases, and systematic literature review. Results were reported as incremental cost-effectiveness ratios (ICERs) in 2017 US Dollars (USD) per quality-adjusted life year (QALY) gained. Sensitivity analyses were performed to assess the influence of parameter uncertainty. Finally, budget impact analysis was conducted.Results: At the Thai ceiling threshold of societal willingness-to-pay of 4,706 USD, the screening colonoscopy every 10 years and annual FIT, starting at age 50, was cost-effective, as compared to no screening resulting in 15.09 and 15.00 QALYs with the ICERs of 600.20 and 509.84 USD/QALY gained, respectively. Colonoscopy every 10 years and annual FIT could prevent 17.9% and 5.7% of early stage cancer and 27.8% and 9.2% of late stage cancer per 100,000 screening over lifetime when compared to no screening, respectively. The colonoscopy screening was cost-effective with the ICER of 646.53 USD/QALY gained when compared to FIT. The probabilities of being cost-effective for the colonoscopy and FIT were 75% and 25%, respectively. Budget impact analysis showed the colonoscopy screening required an 8-times higher budget than FIT.Conclusions: Colonoscopy offers the best value for money of CRC screenings in Thailand. Annual FIT is potentially feasible since it requires less resources. Our findings can be used as part of evidence for informing policy decision making.Key points for decision makersThere was a lack of cost-effective study of colorectal cancer screening programs in low- and middle-income countries.This study evaluated lifetime health outcomes and costs, and the cost-effectiveness of colorectal screening options for average-risk persons in Thailand.Colonoscopy screening every 10 years is cost-effective with high probability of being cost-effective as compared with annual fecal immunochemical test.Screening by annual fecal immunochemical test is more feasible in terms of human resource and budgetary burden.Colorectal screening programs provides an opportunity for early diagnosis and treatments to prevent advance colorectal stages and avoid higher consequent costs.This study contributes a new evidence-based knowledge for Thailand and can be used to support policy decision making process.
Collapse
Affiliation(s)
- Pochamana Phisalprapa
- Faculty of Economics, Chulalongkorn University, Bangkok, Thailand
- Division of Ambulatory Medicine, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | | | - Nathorn Chaiyakunapruk
- Department of Pharmacotherapy, College of Pharmacy, University of Utah, Salt Lake City, UT, USA
| |
Collapse
|
12
|
Al-Azri M, Al-Kindi J, Al-Harthi T, Al-Dahri M, Panchatcharam SM, Al-Maniri A. Awareness of Stomach and Colorectal Cancer Risk Factors, Symptoms and Time Taken to Seek Medical Help Among Public Attending Primary Care Setting in Muscat Governorate, Oman. JOURNAL OF CANCER EDUCATION : THE OFFICIAL JOURNAL OF THE AMERICAN ASSOCIATION FOR CANCER EDUCATION 2019; 34:423-434. [PMID: 28782080 DOI: 10.1007/s13187-017-1266-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Colorectal and stomach cancers are the top ranking cancers in Oman. Most of the patients are diagnosed at advanced disease stages. The aim of this study is to explore the knowledge of risk factors, symptoms and the time needed to seek medical care for stomach cancer and colorectal cancer (CRC) among Omani participants attending 28 local health centres (LHCs) in the governorate of Muscat, the capital city of Oman. The Bowel Cancer/CRC Awareness Measure (CAM) questionnaire (translated into Arabic) was used to collect data from Omani adult participants (aged 18 years and above) who attended the LHCs during the study period. There was a total of 405 participants in the study out of the 500 who were invited (response rate = 81%). The most recognised risk factors were excessive drinking of alcohol (73.1%) and smoking (70.6%); the least recognised were doing less exercise (37.3%), eating food which was high in salt (26.8%) and a diagnosis of diabetes mellitus (24.9%). Multinomial logistic regression showed that young participants recognised more risk factors than older participants; highly educated participants recognised more risk factors than the less-educated and married participants recognised more risk factors than single participants. Participants with a high level of education were more likely to identify signs and symptoms of stomach cancer and CRC than less-educated participants. Multinomial logistic regression showed women were more likely than men to report barriers to seeking medical help (fear, difficulty in arranging transport, worried what the doctor might find). Also, participants with less education were more likely to report barriers than the highly educated (worried about wasting the doctor's time, difficulty in arranging transport, did not feel confident talking about symptoms, embarrassed, scared, worried what doctor might find). The majority of participants (93.6%) were not aware of any CRC screening programme or had undergone any screening (98.3) for CRC. Only 52.6% of participants would have a colonoscopy if the doctors advised; the main reasons for refusal were embarrassment (40.0%), lack of trust in the doctors (33.3%) and religious or culture beliefs (21.3%). Around 39% of participants would prefer to have their colonoscopy examination abroad. There is an urgent need to increase the public's awareness of stomach cancer and CRC in Oman, particularly with evidence emerging of an increase in the incidence. School curriculums could include sessions on cancer education and the information be reiterated to students periodically. A strategy to establish a CRC screening programme in Oman might be paramount as the incidence of CRC increased.
Collapse
Affiliation(s)
- Mohammed Al-Azri
- Department of Family Medicine and Public Health, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Oman.
| | - Jamila Al-Kindi
- Oman Medical Specialty Board, Al Dakhilya Region Ministry of health, Muscat, Oman
| | - Thuraiya Al-Harthi
- Department of Non-communicable Diseases, Directorate General of Health Services, Ministry of health, Muscat, Oman
| | - Manal Al-Dahri
- Oman Medical Specialty Board, North Al Batinah Region, Ministry of health, Muscat, Oman
| | | | | |
Collapse
|
13
|
Portillo I, Arana-Arri E, Gutiérrez-Ibarluzea I, Bilbao I, Luis Hurtado J, Sarasqueta C, Idigoras I, Bujanda L. Factors related to the participation and detection of lesions in colorectal cancer screening programme-based faecal immunochemical test. Eur J Public Health 2019; 28:1143-1148. [PMID: 29982586 DOI: 10.1093/eurpub/cky109] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background The overall aim of this study was to describe trends in participation rates and detection of lesions in a colorectal cancer (CRC) screening programme, during three rounds, using faecal immunochemical test (FIT). Methods National registers were used to collect data on invitations for CRC screening in the Basque Country (Spain) from 2009 to 2014. Information about participation, age, gender and lesions in each round were collected. Results A total of 961.533 individuals were included in the analysis; respectively, 584.950, 298.143 and 78.440 in the first, second and third rounds. The average participation rate was 68.4% (66.8, 70.4 and 72.3%, respectively by round; P < 0.001) and the positivity rate was 6.3% (7, 5.5 and 5.4%, respectively by round; P < 0.001). The participation rate increased significantly with age and was found to be higher in women versus men. A total of 15.144 advanced adenomas and 2.131 CRCs were diagnosed, leading to a detection rate of 23.9 and 3.4‰, respectively. Regarding gender, men had the highest rates in all periods and rounds. The detection rate of advanced neoplasia was lower in the regular when compared with irregular paricipants. Conclusions In a CRC screening, this organization obtained high FIT participation rates. Older participants and women were associated with a higher participation. The detection rate of lesions was higher in men, independent on age and round.
Collapse
Affiliation(s)
- Isabel Portillo
- Colorectal Cancer Screening Programme Coordination Center, Bilbao, Spain
| | | | | | - Isabel Bilbao
- Colorectal Cancer Screening Programme Coordination Center, Bilbao, Spain
| | | | - Cristina Sarasqueta
- Hospital Universitario Donostia/Instituto Biodonostia, Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), San Sebastián, Spain
| | - Isabel Idigoras
- Colorectal Cancer Screening Programme Coordination Center, Bilbao, Spain
| | - Luis Bujanda
- Gastroenterology Department, Instituto Biodonostia, University of Basque Country (UPV/EHU), Centro de Investigación Biomédica en Red de Enfermedades Hepaticas y Digestivas (CIBERehd), San Sebastián, Spain
| | | |
Collapse
|
14
|
Participation in a population-based screening for colorectal cancer using the faecal immunochemical test decreases mortality in 5 years. Eur J Gastroenterol Hepatol 2019; 31:197-204. [PMID: 30543575 DOI: 10.1097/meg.0000000000001338] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND The steady increase in colorectal cancer (CRC) could be reversed through timely secondary prevention (screening) as a main strategy. The aims of this study were to determine the main features of CRC, survival rate and related factors for different types of identified CRCs in a population-based screening programme using the faecal immunochemical test (FIT). MATERIALS AND METHODS The CRCs in the susceptible population to be screened between 2009 and 2014 were identified and classified into four groups: (a) nonscreening-detected CRC (diagnosed before first screening invitation and nonparticipants), (b) screening-detected CRC, (c) interval cancer (IC) FIT (diagnosed between screening rounds after a negative FIT) and (d) IC colonoscopy (diagnosed before the colonoscopy surveillance, which is recommended after the screening colonoscopy). Patient demographics and epidemiological characteristics, tumour characteristics and survival were compared between the four groups. RESULTS 5909 individuals were diagnosed with a CRC. The median follow-up of survival was 4.6 years (range: 0-9 years). The study highlights a significant difference (P<0.0001) in the 5-year survival in the screening-detected CRC group compared with those who had nonscreening-detected CRCs (90.1 vs. 66.7%). Although ICs are not desirable events, the 5-year survival rate is significantly higher with respect to nonparticipants (P<0.0001) (76.3 vs. 60.5%), this being the group with the lowest survival rate. CONCLUSION The significantly higher 5-year survival rate of 23.4% of the participants in the screening programme suggests that incidence and mortality rates of CRC will decrease in the near future for participants in screening programmes. A high participation rate is essential to achieve health benefits, irrespective of the type of participation.
Collapse
|
15
|
Smith DH, O'Keeffe Rosetti M, Mosen DM, Rosales AG, Keast E, Perrin N, Feldstein AC, Levin TR, Liles EG. Balancing Adherence and Expense: The Cost-Effectiveness of Two-Sample vs One-Sample Fecal Immunochemical Test. Popul Health Manag 2018; 22:83-89. [PMID: 29927702 DOI: 10.1089/pop.2018.0008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Colorectal cancer (CRC) causes more than 50,000 deaths each year in the United States but early detection through screening yields survival gains; those diagnosed with early stage disease have a 5-year survival greater than 90%, compared to 12% for those diagnosed with late stage disease. Using data from a large integrated health system, this study evaluates the cost-effectiveness of fecal immunochemical testing (FIT), a common CRC screening tool. A probabilistic decision-analytic model was used to examine the costs and outcomes of positive test results from a 1-FIT regimen compared with a 2-FIT regimen. The authors compared 5 diagnostic cutoffs of hemoglobin concentration for each test (for a total of 10 screening options). The principal outcome from the analysis was the cost per additional advanced neoplasia (AN) detected. The authors also estimated the number of cancers detected and life-years gained from detecting AN. The following costs were included: program management of the screening program, patient identification, FIT kits and their processing, and diagnostic colonoscopy following a positive FIT. Per-person costs ranged from $33 (1-FIT at 150ng/ml) to $92 (2-FIT at 50ng/ml) across screening options. Depending on willingness to pay, the 1-FIT 50 ng/ml and the 2-FIT 50 ng/ml are the dominant strategies with cost-effectiveness of $11,198 and $28,389, respectively, for an additional AN detected. The estimates of cancers avoided per 1000 screens ranged from 1.46 to 4.86, depending on the strategy and the assumptions of AN to cancer progression.
Collapse
Affiliation(s)
- David H Smith
- 1 Center for Health Research , Kaiser Permanente Northwest, Portland, Oregon
| | | | - David M Mosen
- 1 Center for Health Research , Kaiser Permanente Northwest, Portland, Oregon
| | - A Gabriela Rosales
- 1 Center for Health Research , Kaiser Permanente Northwest, Portland, Oregon
| | - Erin Keast
- 1 Center for Health Research , Kaiser Permanente Northwest, Portland, Oregon
| | - Nancy Perrin
- 1 Center for Health Research , Kaiser Permanente Northwest, Portland, Oregon
| | - Adrianne C Feldstein
- 1 Center for Health Research , Kaiser Permanente Northwest, Portland, Oregon.,2 Northwest Permanente, Kaiser Permanente Northwest , Portland, Oregon
| | | | - Elizabeth G Liles
- 1 Center for Health Research , Kaiser Permanente Northwest, Portland, Oregon.,2 Northwest Permanente, Kaiser Permanente Northwest , Portland, Oregon
| |
Collapse
|
16
|
Abstract
PURPOSE Lynch syndrome (LS) is associated with a high risk of colorectal cancer (CRC). The aim of this study was to assess the cumulative risk for the development of colorectal adenomas or carcinomas in a LS CRC surveillance program and to audit the quality of the endoscopic procedures. METHODS We evaluated 147 asymptomatic LS mutation carriers, without previous CRC, in a surveillance program with colonoscopy every 12-18 months, between 2005 and 2016. Data was obtained by retrospective review of colonoscopy reports and hospital clinical files. The main outcome was assessed using Kaplan-Meier curves. Logistic regression was used to study the risk of developing adenomas. RESULTS Patients were under surveillance for 1092 observation years (mean, 7.7 years/patient). Most exams presented adequate bowel preparation (83.5%) and 99.2% achieved cecal intubation. The estimated risk for adenomas at age 60 was 75.6% in men (95%CI, 60.5-88.3) and 65.5% in women (95%CI, 50.8-79.7). Male gender (OR 2.4; 95%CI, 1.2-4.9; p = 0.018) and age at start of surveillance > 40 years (OR 3.7; 95%CI, 1.8-7.7; p < 0.001) were independent risk factors for adenoma detection. CRC was diagnosed in 11 patients with an estimated cumulative risk at age 60 of 18.4% (95%CI, 9.2-34.8%); 72.7% of CRC were classified as stage I; no patient died from CRC. CONCLUSION A colonoscopic surveillance program in LS patients allowed the detection of adenomas in a large group of mutation carriers and diagnosis of early-stage carcinomas. Our findings may help other teams to adopt similar strategies or to refer patients early to specialized centers.
Collapse
|
17
|
Wu TY, Chung CH, Lin CN, Hwang JS, Wang JD. Lifetime risks, loss of life expectancy, and health care expenditures for 19 types of cancer in Taiwan. Clin Epidemiol 2018; 10:581-591. [PMID: 29872347 PMCID: PMC5973634 DOI: 10.2147/clep.s155601] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background The mortality rates for different cancers are no longer an efficient tool for making national policy. The purpose of this study were to quantify the lifetime risks, life expectancies (LEs) after diagnosis, expected years of life lost (EYLL), and lifetime health care expenditures for 19 major cancers in Taiwan. Methods A total of 831,314 patients with 19 pathologically proven cancers were abstracted from the Taiwan Cancer Registry from 1998 to 2012. They were linked to the National Mortality Registry (1998–2014) and National Health Insurance reimbursement database (1998–2013) for survival and health care costs. We estimated the cumulative incidence rate for ages 0–79 years and the lifetime survival function for patients with different cancer sites. The EYLL was calculated by subtracting the LE of each cancer cohort from that of the age- and sex-matched referents simulated from national life tables. The estimated lifetime cost was calculated by adding up the product of survival probability and mean cost at the corresponding duration-to-date after adjustment for the inflation to the year of 2013. Results There were 5 cancers with a lifetime risk exceeding 4%: colorectal, liver, lung, and prostate in males, and breast and colorectal in females. Cancers with EYLL of >10 years were: esophageal, intrahepatic bile ducts, liver, pancreas, oral, nasopharyngeal, leukemia, lung, and gallbladder, extrahepatic bile ducts and biliary tract in males, and intrahepatic bile ducts, pancreas, nasopharyngeal, lung, esophageal, leukemia, liver, gallbladder, extrahepatic bile ducts and biliary tract, ovary, and stomach in females. Cancers with lifetime health care expenditures exceeding US$50,000 to the National Health Insurance were as follows: leukemia, kidney, testis, renal pelvis and ureter in males, and renal pelvis and ureter, leukemia, breast, urinary bladder, kidney, ovary, and nasopharyngeal in females. All these impacts should be considered in health policy decisions. Conclusion The impacts of cancer in Taiwan are very large. Future studies must consider both quality of life and the entire impact from societal perspectives.
Collapse
Affiliation(s)
- Tzu-Yi Wu
- Institute of Economics, Academia Sinica, Taipei, Taiwan
| | - Chia-Hua Chung
- Institute of Statistical Science, Academia Sinica, Taipei, Taiwan
| | - Chia-Ni Lin
- Department of Public Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | | | - Jung-Der Wang
- Department of Public Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Occupational and Environmental Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| |
Collapse
|
18
|
Simulating results from trials of sigmoidoscopy screening using the OncoSim microsimulation model. J Cancer Policy 2018. [DOI: 10.1016/j.jcpo.2017.12.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
19
|
Projected effect of fecal immunochemical test threshold for colorectal cancer screening on outcomes and costs for Canada using the OncoSim microsimulation model. J Cancer Policy 2017. [DOI: 10.1016/j.jcpo.2017.07.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
20
|
McLeod M, Kvizhinadze G, Boyd M, Barendregt J, Sarfati D, Wilson N, Blakely T. Colorectal Cancer Screening: How Health Gains and Cost-Effectiveness Vary by Ethnic Group, the Impact on Health Inequalities, and the Optimal Age Range to Screen. Cancer Epidemiol Biomarkers Prev 2017. [DOI: 10.1158/1055-9965.epi-17-0150] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
21
|
Aronsson M, Carlsson P, Levin LÅ, Hager J, Hultcrantz R. Cost-effectiveness of high-sensitivity faecal immunochemical test and colonoscopy screening for colorectal cancer. Br J Surg 2017; 104:1078-1086. [PMID: 28561259 DOI: 10.1002/bjs.10536] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 11/25/2016] [Accepted: 02/08/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND Colorectal cancer screening can decrease morbidity and mortality. However, there are widespread differences in the implementation of programmes and choice of strategy. The primary objective of this study was to estimate lifelong costs and health outcomes of two of the currently most preferred methods of screening for colorectal cancer: colonoscopy and sensitive faecal immunochemical test (FIT). METHODS A cost-effectiveness analysis of colorectal cancer screening in a Swedish population was performed using a decision analysis model, based on the design of the Screening of Swedish Colons (SCREESCO) study, and data from the published literature and registries. Lifelong cost and effects of colonoscopy once, colonoscopy every 10 years, FIT twice, FIT biennially and no screening were estimated using simulations. RESULTS For 1000 individuals invited to screening, it was estimated that screening once with colonoscopy yielded 49 more quality-adjusted life-years (QALYs) and a cost saving of €64 800 compared with no screening. Similarly, screening twice with FIT gave 26 more QALYs and a cost saving of €17 600. When the colonoscopic screening was repeated every tenth year, 7 additional QALYs were gained at a cost of €189 400 compared with a single colonoscopy. The additional gain with biennial FIT screening was 25 QALYs at a cost of €154 300 compared with two FITs. CONCLUSION All screening strategies were cost-effective compared with no screening. Repeated and single screening strategies with colonoscopy were more cost-effective than FIT when lifelong effects and costs were considered. However, other factors such as patient acceptability of the test and availability of human resources also have to be taken into account.
Collapse
Affiliation(s)
- M Aronsson
- Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - P Carlsson
- Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - L-Å Levin
- Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - J Hager
- Departments of Surgery and Clinical and Experimental Medicine, Linköping University, Norrköping, Sweden
| | - R Hultcrantz
- Department of Gastroenterology and Hepatology, Karolinska Institute, Karolinska University Hospital, Solna, Sweden
| |
Collapse
|
22
|
Gordon LG, Brynes J, Baade PD, Neale RE, Whiteman DC, Youl PH, Aitken JF, Janda M. Cost-Effectiveness Analysis of a Skin Awareness Intervention for Early Detection of Skin Cancer Targeting Men Older Than 50 Years. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2017; 20:593-601. [PMID: 28408001 DOI: 10.1016/j.jval.2016.12.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 10/07/2016] [Accepted: 12/18/2016] [Indexed: 06/07/2023]
Abstract
OBJECTIVES To assess the cost-effectiveness of an educational intervention encouraging self-skin examinations for early detection of skin cancers among men older than 50 years. METHODS A lifetime Markov model was constructed to combine data from the Skin Awareness Trial and other published sources. The model incorporated a health system perspective and the cost and health outcomes for melanoma, squamous and basal cell carcinomas, and benign skin lesions. Key model outcomes included Australian costs (2015), quality-adjusted life-years (QALYs), life-years, and counts of skin cancers. Univariate and probabilistic sensitivity analyses were undertaken to address parameter uncertainty. RESULTS The mean cost of the intervention was A$5,298 compared with A$4,684 for usual care, whereas mean QALYs were 7.58 for the intervention group and 7.77 for the usual care group. The intervention was thus inferior to usual care. When only survival gain is considered, the model predicted the intervention would cost A$1,059 per life-year saved. The likelihood that the intervention was cost-effective up to A$50,000 per QALY gained was 43.9%. The model was stable to most data estimates; nevertheless, it relies on the specificity of clinical diagnosis of skin cancers and is subject to limited health utility data for people with skin lesions. CONCLUSIONS Although the intervention improved skin checking behaviors and encouraged men to seek medical advice about suspicious lesions, the overall costs and effects from also detecting more squamous and basal cell carcinomas and benign lesions outweighed the positive health gains from detecting more thin melanomas.
Collapse
MESH Headings
- Age Factors
- Aged
- Australia
- Awareness
- Carcinoma, Basal Cell/diagnosis
- Carcinoma, Basal Cell/economics
- Carcinoma, Basal Cell/mortality
- Carcinoma, Basal Cell/therapy
- Carcinoma, Squamous Cell/diagnosis
- Carcinoma, Squamous Cell/economics
- Carcinoma, Squamous Cell/mortality
- Carcinoma, Squamous Cell/therapy
- Cost Savings
- Cost-Benefit Analysis
- Decision Support Techniques
- Early Detection of Cancer/economics
- Early Detection of Cancer/methods
- Health Care Costs
- Health Knowledge, Attitudes, Practice
- Humans
- Male
- Markov Chains
- Melanoma/diagnosis
- Melanoma/economics
- Melanoma/mortality
- Melanoma/therapy
- Men's Health/economics
- Middle Aged
- Models, Economic
- Patient Education as Topic/economics
- Predictive Value of Tests
- Prognosis
- Quality-Adjusted Life Years
- Reproducibility of Results
- Risk Factors
- Self-Examination/economics
- Sex Factors
- Skin Neoplasms/diagnosis
- Skin Neoplasms/economics
- Skin Neoplasms/mortality
- Skin Neoplasms/therapy
- Time Factors
- Video Recording/economics
Collapse
Affiliation(s)
- Louisa G Gordon
- Population Health Department, QIMR Berghofer Medical Research Institute, Royal Brisbane Hospital, Brisbane, Queensland, Australia; NHMRC Centre for Research Excellence in Sun and Health, Queensland University of Technology, Kelvin Grove, Queensland, Australia.
| | - Joshua Brynes
- Centre for Applied Health Economics, Menzies Health Institute Queensland, Griffith University, Nathan, Queensland, Australia
| | - Peter D Baade
- Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, Queensland, Australia; Cancer Council Queensland, Spring Hill, Queensland, Australia
| | - Rachel E Neale
- Population Health Department, QIMR Berghofer Medical Research Institute, Royal Brisbane Hospital, Brisbane, Queensland, Australia; NHMRC Centre for Research Excellence in Sun and Health, Queensland University of Technology, Kelvin Grove, Queensland, Australia
| | - David C Whiteman
- Population Health Department, QIMR Berghofer Medical Research Institute, Royal Brisbane Hospital, Brisbane, Queensland, Australia; NHMRC Centre for Research Excellence in Sun and Health, Queensland University of Technology, Kelvin Grove, Queensland, Australia
| | - Philippa H Youl
- NHMRC Centre for Research Excellence in Sun and Health, Queensland University of Technology, Kelvin Grove, Queensland, Australia; Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, Queensland, Australia; Cancer Council Queensland, Spring Hill, Queensland, Australia
| | - Joanne F Aitken
- Menzies Health Institute Queensland, Griffith University, Gold Coast Campus, Queensland, Australia; Cancer Council Queensland, Spring Hill, Queensland, Australia
| | - Monika Janda
- NHMRC Centre for Research Excellence in Sun and Health, Queensland University of Technology, Kelvin Grove, Queensland, Australia; School of Public Health, Queensland University of Technology, Kelvin Grove, Queensland, Australia
| |
Collapse
|
23
|
Omidvari AH, Meester RGS, Lansdorp-Vogelaar I. Cost effectiveness of surveillance for GI cancers. Best Pract Res Clin Gastroenterol 2016; 30:879-891. [PMID: 27938783 DOI: 10.1016/j.bpg.2016.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 08/10/2016] [Accepted: 09/06/2016] [Indexed: 02/07/2023]
Abstract
Gastrointestinal (GI) diseases are among the leading causes of death in the world. To reduce the burden of GI diseases, surveillance is recommended for some diseases, including for patients with inflammatory bowel diseases, Barrett's oesophagus, precancerous gastric lesions, colorectal adenoma, and pancreatic neoplasms. This review aims to provide an overview of the evidence on cost-effectiveness of surveillance of individuals with GI conditions predisposing them to cancer, specifically focussing on the aforementioned conditions. We searched the literature and reviewed 21 studies. Despite heterogeneity of studies in terms of settings, study populations, surveillance strategies and outcomes, most reviewed studies suggested at least some surveillance of patients with these GI conditions to be cost-effective. For some high-risk conditions frequent surveillance with 3-month intervals was warranted, while for other conditions, surveillance may only be cost-effective every 10 years. Further studies based on more robust effectiveness evidence are needed to inform and optimise surveillance programmes for GI cancers.
Collapse
Affiliation(s)
- Amir-Houshang Omidvari
- Department of Public Health, Erasmus MC University Medical Center, P.O. Box 2040, 3000 CA Rotterdam, Netherlands.
| | - Reinier G S Meester
- Department of Public Health, Erasmus MC University Medical Center, P.O. Box 2040, 3000 CA Rotterdam, Netherlands.
| | - Iris Lansdorp-Vogelaar
- Department of Public Health, Erasmus MC University Medical Center, P.O. Box 2040, 3000 CA Rotterdam, Netherlands.
| |
Collapse
|
24
|
The effectiveness of FOBT vs. FIT: A meta-analysis on colorectal cancer screening test. Med J Islam Repub Iran 2016; 30:366. [PMID: 27493910 PMCID: PMC4972062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 11/16/2015] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND After lung and prostate cancers, colorectal cancer (CRC) is the third most common cancer in men and the second most common cancer in women after breast cancer worldwide. Every year, more than one million people are diagnosed with colorectal cancer worldwide and half of these patients die from this disease, making it the fourth leading cause of death in the world. This systematic review aimed to assess the effectiveness of the two colorectal diagnostic tests of FOBT (fecal occult blood test) and FIT (fecal immunochemical test)) in terms of technical performance. METHODS To retrieve the relevant evidence, appropriate medical databases such as Cochrane library, NHSEED, Scopus and Google scholar were searched from February 2013 to July 2014, using free-texts and Mesh. In this study, inclusion/exclusion criteria of the papers, randomized controlled trials, economic evaluations, systematic reviews, meta-analyses and meta-syntheses of the effectiveness of FIT versus FOBT tests in moderate-risk populations (age: 50 to 70 years), which had reported the least of such outcomes as sensitivity, specificity and clinical outcomes were reviewed. The analyses of the effectiveness outcomes were performed in the form of meta-analysis. RESULTS Five papers were eligible to be included in the final phase of the study for synthesis. FIT showed a better performance in participation and positivity rate. Moreover, in terms of false positive and negative rate, FIT showed fewer rates compared to FOBT (RR:-4.06; 95% CI (-7.89-0.24), and NN-scope (Number need to scope) (2.2% vs. 1.6%), and NN-screen (Number need to screen) (84% vs. 31-49% in different cut off levels) showed significant differences in FOBT vs. FIT, respectively. CONCLUSION In the five included studies (3, 11-14), the acceptability of FIT was more than FOBT. However, in our meta-analysis, no difference was found between the two tests. FIT was significant in positivity rate and had a better performance in participation rate, and a fewer false negative numbers compared to FOBT.
Collapse
|
25
|
Armengol G, Sarhadi VK, Ghanbari R, Doghaei-Moghaddam M, Ansari R, Sotoudeh M, Puolakkainen P, Kokkola A, Malekzadeh R, Knuutila S. Driver Gene Mutations in Stools of Colorectal Carcinoma Patients Detected by Targeted Next-Generation Sequencing. J Mol Diagn 2016; 18:471-9. [PMID: 27155048 DOI: 10.1016/j.jmoldx.2016.01.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 11/25/2015] [Accepted: 01/20/2016] [Indexed: 12/13/2022] Open
Abstract
Detection of driver gene mutations in stool DNA represents a promising noninvasive approach for screening colorectal cancer (CRC). Amplicon-based next-generation sequencing (NGS) is a good option to study mutations in many cancer genes simultaneously and from a low amount of DNA. Our aim was to assess the feasibility of identifying mutations in 22 cancer driver genes with Ion Torrent technology in stool DNA from a series of 65 CRC patients. The assay was successful in 80% of stool DNA samples. NGS results showed 83 mutations in cancer driver genes, 29 hotspot and 54 novel mutations. One to five genes were mutated in 75% of cases. TP53, KRAS, FBXW7, and SMAD4 were the top mutated genes, consistent with previous studies. Of samples with mutations, 54% presented concomitant mutations in different genes. Phosphatidylinositol 3-kinase/mitogen-activated protein kinase pathway genes were mutated in 70% of samples, with 58% having alterations in KRAS, NRAS, or BRAF. Because mutations in these genes can compromise the efficacy of epidermal growth factor receptor blockade in CRC patients, identifying mutations that confer resistance to some targeted treatments may be useful to guide therapeutic decisions. In conclusion, the data presented herein show that NGS procedures on stool DNA represent a promising tool to detect genetic mutations that could be used in the future for diagnosis, monitoring, or treating CRC.
Collapse
Affiliation(s)
- Gemma Armengol
- Department of Pathology, Faculty of Medicine, University of Helsinki, Helsinki, Finland; Unit of Biological Anthropology, Department of Animal Biology, Plant Biology and Ecology, Autonomous University of Barcelona, Barcelona, Spain
| | - Virinder K Sarhadi
- Department of Pathology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Reza Ghanbari
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Reza Ansari
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Sasan Alborz Biomedical Research Center, Masoud Clinic, Tehran, Iran
| | - Masoud Sotoudeh
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Sasan Alborz Biomedical Research Center, Masoud Clinic, Tehran, Iran
| | - Pauli Puolakkainen
- Gastrointestinal Clinic, The University Central Hospital of Helsinki, Helsinki, Finland
| | - Arto Kokkola
- Gastrointestinal Clinic, The University Central Hospital of Helsinki, Helsinki, Finland
| | - Reza Malekzadeh
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Sasan Alborz Biomedical Research Center, Masoud Clinic, Tehran, Iran
| | - Sakari Knuutila
- Department of Pathology, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
| |
Collapse
|
26
|
Lee KS, Park EC. Cost Effectiveness of Colorectal Cancer Screening Interventions with Their Effects on Health Disparity Being Considered. Cancer Res Treat 2015; 48:1010-9. [PMID: 26727714 PMCID: PMC4946354 DOI: 10.4143/crt.2015.279] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Accepted: 12/16/2015] [Indexed: 01/25/2023] Open
Abstract
Purpose The purpose of this study was to evaluate the cost effectiveness of colorectal cancer screening interventions with their effects on health disparity being considered. Materials and Methods Markov cohort simulation was conducted with the cycle/duration of 1/40 year(s). Data came from the results of randomized trials and others. Participants were hypothetical cohorts aged 50 years as of year 2013 in 16 Korean provinces. The interventions until the age of 80 were annual organized fecal occult blood test (FOBT) (standard screening), annual FOBT with basic reminders for provinces with higher mortalities than the national average (targeted reminder) and annual FOBT with basic/enhanced reminders for all provinces (universal reminder 1 and 2). The comparison was non-screening, the outcome was quality-adjusted life years, and only medical costs for screening and treatment were considered from a societal perspective. The Atkinson incremental cost effectiveness ratio (Atkinson ICER), the incremental cost effectiveness ratio adjusted by the Atkinson Inequality Index, was used to evaluate the cost effectiveness of the four interventions with their impacts on regional health disparity being considered. Results Health disparity was smallest (or greatest) in non-screening (or the standard screening). The targeted reminder had smaller health disparity, and smaller Atkinson ICER with respect to standard screening, than did the universal reminder 1 and 2. Conclusion The targeted reminder might be more cost effective than the universal reminders with their effects on health disparity being considered. This study helps to develop promotional effort for colorectal cancer screening with both the greatest cost effectiveness and the smallest health disparity
Collapse
Affiliation(s)
- Kwang-Sig Lee
- Health Insurance Policy Research Institute, Korea National Health Insurance Service, Wonju, Korea
| | - Eun-Cheol Park
- Department of Preventive Medicine and Institute of Health Services Research, Yonsei University, Seoul, Korea
| |
Collapse
|
27
|
Amri R, Bordeianou LG, Berger DL. The conundrum of the young colon cancer patient. Surgery 2015; 158:1696-703. [PMID: 26298030 DOI: 10.1016/j.surg.2015.07.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 06/25/2015] [Accepted: 07/04/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND Colonoscopy has had a major impact on the incidence and survival of colon cancer for patients who are screened, usually beginning at the age of 50. Meanwhile, the incidence rate of colon cancer is actually increasing in the patients younger than 50 while no routine screening is implemented for this age group. METHODS All patients surgically treated for colon cancer (2004-2011) without preexisting high-risk characteristics (hereditary nonpolyposis colorectal cancer, inflammatory bowel disease) were included (n = 1,015). Age-related disparities in baseline disease and outcomes were reviewed. RESULTS Patients younger than 50 years of age (n = 108; 10.6%) had the greatest baseline rates of metastatic (20.4% vs 8.0%; P < .001), node-positive disease (54.6% vs 39.4%; P = .002), and greater rates of extramural vascular invasion (38.9 vs 29.4%; P = .043). Cancer-related mortality also was greatest in this group (28.7 vs 18.4%; P = .011). Multivariable Cox regression shows that patients younger than 50 are still at significantly greater risk of mortality after adjustment for effects of age, baseline AJCC staging, smoking, and comorbidity (hazard ratio: 1.57, 95% confidence interval 1.01-2.45; P = .049). DISCUSSION Patients younger than 50 present with the most advanced and aggressive disease, giving them the worst stage-independent prognosis of all age groups. Potential causes include age-related differences in tumor biology and underdetection by current screening efforts. This raises the question of how to address the conundrum of the young colon cancer patient, who often is the proverbial needle in a haystack of young patients, with nonspecific gastrointestinal symptoms but who would benefit considerably from early detection.
Collapse
Affiliation(s)
- Ramzi Amri
- Division of General and Gastrointestinal Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Liliana G Bordeianou
- Division of General and Gastrointestinal Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - David L Berger
- Division of General and Gastrointestinal Surgery, Massachusetts General Hospital and Harvard Medical School, Boston, MA.
| |
Collapse
|
28
|
Castells A. Choosing the optimal method in programmatic colorectal cancer screening: current evidence and controversies. Therap Adv Gastroenterol 2015; 8:221-33. [PMID: 26136839 PMCID: PMC4480573 DOI: 10.1177/1756283x15578610] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Colorectal cancer (CRC) is an important health problem all over the world, being the third most common cancer and the second leading cause of cancer-related death in Western countries. The most important strategy for CRC prevention is screening (i.e. secondary prevention). Since it is widely accepted that adenomas and serrated polyps are the precursors of the vast majority of CRC, early detection and removal of these lesions is associated with a reduction of CRC incidence and, consequently, mortality. Moreover, cancers detected by screening are usually diagnosed at early stages and, therefore, curable by endoscopic or surgical procedures. This review will be address CRC screening strategies in average-risk population, which is defined by those individuals, men and women, 50 years of age or older, without any additional personal or familial predisposing risk factor. In order to maximize the impact of screening and ensure high coverage and equity of access, only organized screening programs (i.e. programmatic screening) should be implemented, as opposed to case-finding or opportunistic screening. For that reason and considering that the optimal approach for colorectal screening may differ depending on the scenario, this review will be focused on the advantages and limitations of each screening strategy in an organized setting.
Collapse
Affiliation(s)
- Antoni Castells
- Department of Gastroenterology, Hospital Clínic, Centro de Investigación Biomédica en Red en Enfermedades Hepáticas y Digestivas (CIBERehd), IDIBAPS, University of Barcelona, Villarroel 170, 08036-Barcelona, Catalonia, Spain
| |
Collapse
|
29
|
Hassan C, Gralnek IM. Cost-effectiveness of "full spectrum endoscopy" colonoscopy for colorectal cancer screening. Dig Liver Dis 2015; 47:390-4. [PMID: 25704067 DOI: 10.1016/j.dld.2015.01.154] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 01/23/2015] [Accepted: 01/26/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND Compared to standard forward viewing colonoscopy, we aimed to assess the cost-effectiveness of full spectrum endoscopy colonoscopy in a population-based colorectal cancer screening and surveillance program. METHODS A Markov model was constructed to simulate the occurrence of colorectal neoplasia in a cohort of 100,000 subjects aged 50-100 years. The cost-effectiveness of full spectrum endoscopy was compared with that of standard forwarding viewing colonoscopy. Sensitivity for adenomatous and hyperplastic polyps <5mm, 6-9mm, and high-risk polyps were derived from the recent randomized tandem Fuse colonoscopy study. RESULTS The significantly higher sensitivity of full spectrum endoscopy in detecting additional adenomas resulted in an increase in cancer prevention from 58% to 74%, corresponding to a gain of 9 days per person. This 14% increase led to an absolute reduction in the cost of cancer care from $90 million to $57 million. This cost savings was only minimally impacted by the higher cost of more frequent post-polypectomy colonoscopy surveillance rates, leading to full spectrum endoscopy being associated with a savings of $145 per person. Thus, standard colonoscopy appeared to be "dominated" by the full spectrum endoscopy. CONCLUSIONS Compared to standard colonoscopy, full spectrum endoscopy appears to be more cost-effective for colon cancer screening and surveillance.
Collapse
Affiliation(s)
- Cesare Hassan
- Department of Gastroenterology, Nuovo Regina Margherita Hospital, Rome, Italy.
| | - Ian M Gralnek
- GI Outcomes Unit, Department of Gastroenterology, Rambam Health Care Campus, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| |
Collapse
|
30
|
He Q, Rao T, Guan YS. Virtual gastrointestinal colonoscopy in combination with large bowel endoscopy: Clinical application. World J Gastroenterol 2014; 20:13820-13832. [PMID: 25320519 PMCID: PMC4194565 DOI: 10.3748/wjg.v20.i38.13820] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 05/11/2014] [Accepted: 07/16/2014] [Indexed: 02/06/2023] Open
Abstract
Although colorectal cancer (CRC) has no longer been the leading cancer killer worldwide for years with the exponential development in computed tomography (CT) or magnetic resonance imaging, and positron emission tomography/CT as well as virtual colonoscopy for early detection, the CRC related mortality is still high. The objective of CRC screening is to reduce the burden of CRC and thereby the morbidity and mortality rates of the disease. It is believed that this goal can be achieved by regularly screening the average-risk population, enabling the detection of cancer at early, curable stages, and polyps before they become cancerous. Large-scale screening with multimodality imaging approaches plays an important role in reaching that goal to detect polyps, Crohn’s disease, ulcerative colitis and CRC in early stage. This article reviews kinds of presentative imaging procedures for various screening options and updates detecting, staging and re-staging of CRC patients for determining the optimal therapeutic method and forecasting the risk of CRC recurrence and the overall prognosis. The combination use of virtual colonoscopy and conventional endoscopy, advantages and limitations of these modalities are also discussed.
Collapse
|
31
|
Huang W, Liu G, Zhang X, Fu W, Zheng S, Wu Q, Liu C, Liu Y, Cai S, Huang Y. Cost-effectiveness of colorectal cancer screening protocols in urban Chinese populations. PLoS One 2014; 9:e109150. [PMID: 25285526 PMCID: PMC4186806 DOI: 10.1371/journal.pone.0109150] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Accepted: 08/29/2014] [Indexed: 12/31/2022] Open
Abstract
Colorectal cancer (CRC) takes a second and fourth position in the incidence and mortality lists respectively among all malignant tumors in urban populations in China. This study was designed to evaluate the cost-effectiveness of two different CRC screening protocols: faecal occult blood test (FOBT) alone, and FOBT plus a high-risk factor questionnaire (HRFQ) as the respective initial screens, followed by colonoscopy. We developed a Markov model to simulate the progression of a cohort of 100,000 average risk asymptomatic individuals moving through a defined series of states between the ages of 40 to 74 years. The parameters used for the modeling came from the CESP (Comparison and Evaluation of Screening Programs for Colorectal Cancer in Urban Communities in China) study and published literature. Eight CRC screening scenarios were tested in the Markov model. The cost-effectiveness of CRC screening under each scenario was measured by an incremental cost-effectiveness ratio (ICER) compared with a scenario without CRC screening. The study revealed that a combined use of FOBT and HRFQ is preferable in CRC screening programs as an initial screening instrument. Annual FOBT+HRFQ screening is recommended for those who have a negative initial result and those who have a positive result but have failed to continue to colonoscopic examination. Repeated colonoscopy (for those with a positive result in initial screening but a negative colonoscopy result) should be performed at a ten-year interval instead of one-year. Such a protocol would cost 7732 Yuan per life year saved, which is the most cost-effective option. In conclusion, the current Chinese Trial Version for CRC Screening Strategy should be revised in line with the most cost-effective protocol identified in this study.
Collapse
Affiliation(s)
- Weidong Huang
- School of Health Management, Harbin Medical University, Nangang District, Harbin, China
| | - Guoxiang Liu
- School of Health Management, Harbin Medical University, Nangang District, Harbin, China
| | - Xin Zhang
- School of Health Management, Harbin Medical University, Nangang District, Harbin, China
| | - Wenqi Fu
- School of Health Management, Harbin Medical University, Nangang District, Harbin, China
| | - Shu Zheng
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, Ministry of Education of China; Key Laboratory of Molecular Biology in Medical Sciences, Zhejiang Province, China), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qunhong Wu
- School of Health Management, Harbin Medical University, Nangang District, Harbin, China
| | - Chaojie Liu
- School of Public Health, La Trobe University, Melbourne, Victoria, Australia
| | - Yang Liu
- School of Health Management, Harbin Medical University, Nangang District, Harbin, China
| | - Shanrong Cai
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, Ministry of Education of China; Key Laboratory of Molecular Biology in Medical Sciences, Zhejiang Province, China), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yanqin Huang
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, Ministry of Education of China; Key Laboratory of Molecular Biology in Medical Sciences, Zhejiang Province, China), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| |
Collapse
|
32
|
Massat NJ, Moss SM, Halloran SP, Duffy SW. Screening and Primary prevention of Colorectal Cancer: a Review of sex-specific and site-specific differences. J Med Screen 2013; 20:125-48. [DOI: 10.1177/0969141313501292] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Background Colorectal cancer (CRC) is the second commonest cancer in England. Incidence rates for colorectal adenomas and advanced colorectal neoplasia are higher in men than in women of all age groups. The male-to-female ratio for CRC incidence rates differs for different parts of the large bowel. Objective To summarize the current evidence on colorectal screening and prevention, focussing on potential differences in benefits between sexes and colorectal sites. Methods (i), We reviewed the evidence from randomized controlled trials (RCTs) of the impact of different screening approaches on CRC incidence and mortality, overall, for each sex separately, and for subsites of the large bowel. (ii) We reviewed studies comparing detection parameters for faecal immunochemical tests for haemoglobin (FIT) with guaiac FOBt (gFOBt). (iii) The role of aspirin in CRC prevention in the general population was reviewed using evidence from RCTs, with specific emphasis on the differences observed between sexes and lesion site. Results (i) Our intention-to-treat random-effects meta-analysis showed that once-only flexible sigmoidoscopy (FS) screening performed on average-risk individuals aged 55 + decreased CRC incidence by 18% and mortality by 28%, but sex-specific results were lacking. (ii) Modern quantitative FIT were superior to qualitative gFOBt in average-risk population screening in their ability to discriminate between individuals with and without colorectal neoplasia. Some recent FIT studies suggest varying operating characteristics in men and women. (iii) Evidence of an effect of aspirin on the incidence of CRC (in particular, proximal disease) in both sexes aged 40 and over at average-risk of CRC is emerging. Conclusions We encourage researchers of CRC screening and prevention to publish their results by sex where possible. Pilot studies should be undertaken before implementation of quantitative FIT in a national screening programme to establish the appropriate threshold. Finally, individual risk assessment for CRC and non-CRC events, will be necessary to make an informed decision on whether a patient should receive aspirin chemoprevention.
Collapse
Affiliation(s)
- Nathalie J Massat
- Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| | - Sue M Moss
- Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| | - Stephen P Halloran
- Royal Surrey County Hospital NHS Foundation Trust and the University of Surrey, Guildford, UK
| | - Stephen W Duffy
- Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, UK
| |
Collapse
|
33
|
Holme Ø, Bretthauer M, Fretheim A, Odgaard‐Jensen J, Hoff G. Flexible sigmoidoscopy versus faecal occult blood testing for colorectal cancer screening in asymptomatic individuals. Cochrane Database Syst Rev 2013; 2013:CD009259. [PMID: 24085634 PMCID: PMC9365065 DOI: 10.1002/14651858.cd009259.pub2] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Colorectal cancer is the third most frequent cancer in the world. As the sojourn time for this cancer is several years and a good prognosis is associated with early stage diagnosis, screening has been implemented in a number of countries. Both screening with faecal occult blood test and flexible sigmoidoscopy have been shown to reduce mortality from colorectal cancer in randomised controlled trials. The comparative effectiveness of these tests on colorectal cancer mortality has, however, never been evaluated, and controversies exist over which test to choose. OBJECTIVES To compare the effectiveness of screening for colorectal cancer with flexible sigmoidoscopy to faecal occult blood testing. SEARCH METHODS We searched MEDLINE and EMBASE (November 16, 2012), the Cochrane Central Register of Controlled Trials (CENTRAL) (2012, Issue 11) and reference lists for eligible studies. SELECTION CRITERIA Randomised controlled trials comparing screening with flexible sigmoidoscopy or faecal occult blood testing to each other or to no screening. Only studies reporting mortality from colorectal cancer were included. Faecal occult blood testing had to be repeated (annually or biennially). DATA COLLECTION AND ANALYSIS Data retrieval and assessment of risk of bias were performed independently by two review authors. Standard meta-analyses using a random-effects model were conducted for flexible sigmoidoscopy and faecal occult blood testing (FOBT) separately and we calculated relative risks with 95% confidence intervals (CI). We used a Bayesian approach (a contrast-based network meta-analysis method) for indirect analyses and presented the results as posterior median relative risk with 95% credibility intervals. We assessed the quality of evidence using GRADE. MAIN RESULTS We identified nine studies comprising 338,467 individuals randomised to screening and 405,919 individuals to the control groups. Five studies compared flexible sigmoidoscopy to no screening and four studies compared repetitive guaiac-based FOBT (annually and biennially) to no screening. We did not consider that study risk of bias reduced our confidence in our results. We did not identify any studies comparing the two screening methods directly. When compared with no screening, colorectal cancer mortality was lower with flexible sigmoidoscopy (relative risk 0.72; 95% CI 0.65 to 0.79, high quality evidence) and FOBT (relative risk 0.86; 95% CI 0.80 to 0.92, high quality evidence). In the analyses based on indirect comparison of the two screening methods, the relative risk of dying from colorectal cancer was 0.85 (95% credibility interval 0.72 to 1.01, low quality evidence) for flexible sigmoidoscopy screening compared to FOBT. No complications occurred after the FOBT test itself, but 0.03% of participants suffered a major complication after follow-up. Among more than 60,000 flexible sigmoidoscopy screening procedures and almost 6000 work-up colonoscopies, a major complication was recorded in 0.08% of participants. Adverse event data should be interpreted with caution as the reporting of adverse effects was incomplete. AUTHORS' CONCLUSIONS There is high quality evidence that both flexible sigmoidoscopy and faecal occult blood testing reduce colorectal cancer mortality when applied as screening tools. There is low quality indirect evidence that screening with either approach reduces colorectal cancer deaths more than the other. Major complications associated with screening require validation from studies with more complete reporting of harms
Collapse
Affiliation(s)
- Øyvind Holme
- Sorlandet Hospital KristiansandDepartment of MedicineServicebox 416KristiansandNorway4604
| | - Michael Bretthauer
- University of OsloInstitute of Health and Society, Dep. of Health Management and Health EconomicsPO Box 1089 BlindernOsloNorway0318
| | - Atle Fretheim
- Norwegian Knowledge Centre for the Health ServicesGlobal Health UnitOsloNorway
| | - Jan Odgaard‐Jensen
- Norwegian Knowledge Centre for the Health ServicesGlobal Health UnitOsloNorway
| | - Geir Hoff
- Telemark HospitalR&DUlefossvatnSkienNorway3710
| | | |
Collapse
|
34
|
Hummel JM, Steuten LGM, Groothuis-Oudshoorn CJM, Mulder N, Ijzerman MJ. Preferences for colorectal cancer screening techniques and intention to attend: a multi-criteria decision analysis. APPLIED HEALTH ECONOMICS AND HEALTH POLICY 2013; 11:499-507. [PMID: 23979875 DOI: 10.1007/s40258-013-0051-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Despite the expected health benefits of colorectal cancer screening programs, participation rates remain low in countries that have implemented such a screening program. The perceived benefits and risks of the colorectal cancer screening technique are likely to influence the decision to attend the screening program. Besides the diagnostic accuracy and the risks of the screening technique, which can affect the health of the participants, additional factors, such as the burden of the test, may impact the individuals' decisions to participate. To maximise the participation rate of a screening program for a new colorectal cancer program in the Netherlands, it is important to know the preferences of the screening population for alternative screening techniques. OBJECTIVE The aim of this study was to explore the impact of preferences for particular attributes of the screening tests on the intention to attend a colorectal cancer screening program. METHODS We used a web-based questionnaire to elicit the preferences of the target population for a selection of colon-screening techniques. The target population consisted of Dutch men and women aged 55-75 years. The analytic hierarchy process (AHP), a technique for multi-criteria analysis, was used to estimate the colorectal cancer screening preferences. Respondents weighted the relevance of five criteria, i.e. the attributes of the screening techniques: sensitivity, specificity, safety, inconvenience, and frequency of the test. With regard to these criteria, preferences were estimated between four alternative screening techniques, namely, immunochemical fecal occult blood test (iFOBT), colonoscopy, sigmoidoscopy, and computerized tomographic (CT) colonography. A five-point ordinal scale was used to estimate the respondents' intention to attend the screening. We conducted a correlation analysis on the preferences for the screening techniques and the intention to attend. RESULTS We included 167 respondents who were consistent in their judgments of the relevance of the criteria and their preferences for the screening techniques. The most preferred screening method for the national screening program was CT colonography. Sensitivity (weight = 0.26) and safety (weight = 0.26) were the strongest determinants of the overall preferences for the screening techniques. However, the screening test with the highest intention to attend was iFOBT. Inconvenience (correlation [r] = 0.69), safety (r = 0.58), and the frequency of the test (r = 0.58) were most strongly related to intention to attend. CONCLUSIONS The multi-criteria decision analysis revealed the attributes of the screening techniques that are most important so as to increase intention to participate in a screening program. Even though the respondents may recognize the high importance of diagnostic effectiveness in the long term, their short-term decision to attend the screening tests may be less driven by this consideration. Our analysis suggests that inconvenience, safety, and frequency of the test are the strongest technique-related determinants of the respondents' intention to participate in colorectal screening programs.
Collapse
Affiliation(s)
- J Marjan Hummel
- Department of Health Technology and Services Research, MIRA, University of Twente, PO Box 217, 7500 AE, Enschede, The Netherlands,
| | | | | | | | | |
Collapse
|
35
|
Duffy MJ, Lamerz R, Haglund C, Nicolini A, Kalousová M, Holubec L, Sturgeon C. Tumor markers in colorectal cancer, gastric cancer and gastrointestinal stromal cancers: European group on tumor markers 2014 guidelines update. Int J Cancer 2013; 134:2513-22. [PMID: 23852704 PMCID: PMC4217376 DOI: 10.1002/ijc.28384] [Citation(s) in RCA: 224] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 06/25/2013] [Indexed: 02/06/2023]
Abstract
Biomarkers currently play an important role in the detection and management of patients with several different types of gastrointestinal cancer, especially colorectal, gastric, gastro-oesophageal junction (GOJ) adenocarcinomas and gastrointestinal stromal tumors (GISTs). The aim of this article is to provide updated and evidence-based guidelines for the use of biomarkers in the different gastrointestinal malignancies. Recommended biomarkers for colorectal cancer include an immunochemical-based fecal occult blood test in screening asymptomatic subjects ≥50 years of age for neoplasia, serial CEA levels in postoperative surveillance of stage II and III patients who may be candidates for surgical resection or systemic therapy in the event of distant metastasis occurring, K-RAS mutation status for identifying patients with advanced disease likely to benefit from anti-EGFR therapeutic antibodies and microsatellite instability testing as a first-line screen for subjects with Lynch syndrome. In advanced gastric or GOJ cancers, measurement of HER2 is recommended in selecting patients for treatment with trastuzumab. For patients with suspected GIST, determination of KIT protein should be used as a diagnostic aid, while KIT mutational analysis may be used for treatment planning in patients with diagnosed GISTs.
Collapse
Affiliation(s)
- M J Duffy
- Clinical Research Center, St Vincent's University Hospital, Dublin 4 and UCD School of Medicine and Medical Science, Conway Institute, University College Dublin, Dublin, Ireland
| | | | | | | | | | | | | |
Collapse
|
36
|
Mosli MH, Al-Ahwal MS. Colorectal cancer in the Kingdom of Saudi Arabia: need for screening. Asian Pac J Cancer Prev 2013; 13:3809-13. [PMID: 23098475 DOI: 10.7314/apjcp.2012.13.8.3809] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Colorectal cancer (CRC) is a major health problem in the Kingdom of Saudi Arabia (KSA). Our aim was to characterize the epidemiology of CRC in the Saudi population. DESIGN AND SETTING Retrospective analysis of all cases of CRC recorded in the Saudi Cancer Registry (SCR) between January 2001 and December 2006 amongst Saudi citizens in KSA. PATIENTS AND METHODS Data were retrieved from the database of the SCR. Descriptive statistics was performed using SPSS. RESULTS A total of 4,201 cases of CRC were registered in the SCR. The incidence of CRC increased between 2001 and 2006. The mean age of patients at the time of diagnosis was 58 years; most patients were above 45 years of age (n=3322; 79.1%). At the time of diagnosis, 977 patients (23.0%) presented with localized disease and 1,018 (24.0%) had distant metastasis. The most frequent pathological variant was adenocarcinoma (73%), with grade 2 (moderately differentiated) being the most common grade among all variants (61%). For all cancer grades, the frequency of CRC was significantly higher among patients >45 years (P=0.004), who presented with more advanced disease (stages III and IV) (P=0.012). Based on logistic regression, age >45 years was associated with advanced regional presentation (P=0.001). Tumor grade was associated with advanced regional presentation and metastasis. CONCLUSION There was an increase in the incidence of CRC between 2001 and 2006. The age at the time of diagnosis was low when compared with reports from developed countries. A nationwide approach is needed to encourage and illustrate the importance of screening programs.
Collapse
|
37
|
Sharp L, Tilson L, Whyte S, Ceilleachair AO, Walsh C, Usher C, Tappenden P, Chilcott J, Staines A, Barry M, Comber H. Using resource modelling to inform decision making and service planning: the case of colorectal cancer screening in Ireland. BMC Health Serv Res 2013; 13:105. [PMID: 23510135 PMCID: PMC3637462 DOI: 10.1186/1472-6963-13-105] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2012] [Accepted: 01/10/2013] [Indexed: 12/14/2022] Open
Abstract
Background Organised colorectal cancer screening is likely to be cost-effective, but cost-effectiveness results alone may not help policy makers to make decisions about programme feasibility or service providers to plan programme delivery. For these purposes, estimates of the impact on the health services of actually introducing screening in the target population would be helpful. However, these types of analyses are rarely reported. As an illustration of such an approach, we estimated annual health service resource requirements and health outcomes over the first decade of a population-based colorectal cancer screening programme in Ireland. Methods A Markov state-transition model of colorectal neoplasia natural history was used. Three core screening scenarios were considered: (a) flexible sigmoidoscopy (FSIG) once at age 60, (b) biennial guaiac-based faecal occult blood tests (gFOBT) at 55–74 years, and (c) biennial faecal immunochemical tests (FIT) at 55–74 years. Three alternative FIT roll-out scenarios were also investigated relating to age-restricted screening (55–64 years) and staggered age-based roll-out across the 55–74 age group. Parameter estimates were derived from literature review, existing screening programmes, and expert opinion. Results were expressed in relation to the 2008 population (4.4 million people, of whom 700,800 were aged 55–74). Results FIT-based screening would deliver the greatest health benefits, averting 164 colorectal cancer cases and 272 deaths in year 10 of the programme. Capacity would be required for 11,095-14,820 diagnostic and surveillance colonoscopies annually, compared to 381–1,053 with FSIG-based, and 967–1,300 with gFOBT-based, screening. With FIT, in year 10, these colonoscopies would result in 62 hospital admissions for abdominal bleeding, 27 bowel perforations and one death. Resource requirements for pathology, diagnostic radiology, radiotherapy and colorectal resection were highest for FIT. Estimates depended on screening uptake. Alternative FIT roll-out scenarios had lower resource requirements. Conclusions While FIT-based screening would quite quickly generate attractive health outcomes, it has heavy resource requirements. These could impact on the feasibility of a programme based on this screening modality. Staggered age-based roll-out would allow time to increase endoscopy capacity to meet programme requirements. Resource modelling of this type complements conventional cost-effectiveness analyses and can help inform policy making and service planning.
Collapse
Affiliation(s)
- Linda Sharp
- National Cancer Registry Ireland, Cork Airport Business Park, Kinsale Road, Cork, Ireland.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Smith DH, Feldstein AC, Perrin N, Rosales AG, Mosen DM, Liles EG, Schneider JL, Lafata JE, Meyers RE, Glasgow RE. Automated telephone calls to enhance colorectal cancer screening: economic analysis. THE AMERICAN JOURNAL OF MANAGED CARE 2012; 18:691-9. [PMID: 23198712 PMCID: PMC3845657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/05/2023]
Abstract
OBJECTIVES To estimate the cost-effectiveness of an automated telephone intervention for colorectal cancer screening from a managed care perspective, using data from a pragmatic randomized controlled trial. METHODS Intervention patients received calls for fecal occult blood testing (FOBT) screening. We searched patients' electronic medical records for any screening (defined as FOBT, flexible sigmoidoscopy, double-contrast barium enema, or colonoscopy) during follow-up. Intervention costs included project implementation and management, telephone calls, patient identification, and tracking. Screening costs included FOBT (kits, mailing, and processing) and any completed screening tests during follow-up. We estimated the incremental cost-effectiveness ratio (ICER) of the cost per additional screen. RESULTS At 6 months, average costs for intervention and control patients were $37 (25% screened) and $34 (19% screened), respectively. The ICER at 6 months was $42 per additional screen, less than half what other studies have reported. Cost-effectiveness probability was 0.49, 0.84, and 0.99 for willingness-to-pay thresholds of $40, $100, and $200, respectively. Similar results were seen at 9 months. A greater increase in FOBT testing was seen for patients aged >70 years (45/100 intervention, 33/100 control) compared with younger patients (25/100 intervention, 21/100 control). The intervention was dominant for patients aged >70 years and was $73 per additional screen for younger patients. It increased screening rates by about 6% and costs by $3 per patient. CONCLUSIONS At willingness to pay of $100 or more per additional screening test, an automated telephone reminder intervention can be an optimal use of resources.
Collapse
Affiliation(s)
- David H Smith
- Center for Health Research, Kaiser Permanente Northwest, Portland, OR, USA.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Littlejohn C, Hilton S, Macfarlane GJ, Phull P. Systematic review and meta-analysis of the evidence for flexible sigmoidoscopy as a screening method for the prevention of colorectal cancer. Br J Surg 2012; 99:1488-500. [PMID: 23001715 DOI: 10.1002/bjs.8882] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/12/2012] [Indexed: 12/18/2022]
Abstract
BACKGROUND Colorectal cancer is a significant cause of death. Removal of precancerous adenomas, and early detection and treatment of cancer, has been shown to reduce the risk of death. The aim of this review and meta-analysis was to determine whether flexible sigmoidoscopy (FS) is an effective population screening method for reducing mortality from colorectal cancer. METHODS MEDLINE (1946 to December 2012) and Embase (1980-2012, week 15) were searched for randomized clinical trials in which FS was used to screen non-symptomatic adults from a general population, and FS was compared with either no screening or any other alternative screening methods. Meta-analysis was carried out using a random-effects Mantel-Haenzsel model. RESULTS Twenty-four papers met the inclusion criteria, reporting results from 14 trials. Uptake of FS was usually lower than that for stool-based tests, although FS was more effective at detecting advanced adenoma and carcinoma. FS reduced the incidence of colorectal cancer after screening, and long-term mortality from colorectal cancer, compared with no screening in a selected population. Compared with stool-based tests in a general population, FS was associated with fewer interval cancers. CONCLUSION FS is efficacious at reducing colorectal cancer mortality compared with no screening. It is more effective at detecting advanced adenoma and carcinoma than stool-based tests. FS may be compromised by poorer uptake. Introduction of FS as a screening method should be done on a pilot basis in populations in which it is not currently used, and close attention should be paid to maximizing uptake. The relative risk of adverse events with FS compared with stool-based tests should be quantified, and its real-world effectiveness evaluated against the most effective stool-based tests.
Collapse
Affiliation(s)
- C Littlejohn
- NHS Grampian, Institute of Applied Health Sciences, University of Aberdeen, School of Medicine and Dentistry, Foresterhill, Aberdeen, UK.
| | | | | | | |
Collapse
|
40
|
Sharp L, Tilson L, Whyte S, O'Ceilleachair A, Walsh C, Usher C, Tappenden P, Chilcott J, Staines A, Barry M, Comber H. Cost-effectiveness of population-based screening for colorectal cancer: a comparison of guaiac-based faecal occult blood testing, faecal immunochemical testing and flexible sigmoidoscopy. Br J Cancer 2012; 106:805-16. [PMID: 22343624 PMCID: PMC3305953 DOI: 10.1038/bjc.2011.580] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 11/10/2011] [Accepted: 11/22/2011] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Several colorectal cancer-screening tests are available, but it is uncertain which provides the best balance of risks and benefits within a screening programme. We evaluated cost-effectiveness of a population-based screening programme in Ireland based on (i) biennial guaiac-based faecal occult blood testing (gFOBT) at ages 55-74, with reflex faecal immunochemical testing (FIT); (ii) biennial FIT at ages 55-74; and (iii) once-only flexible sigmoidoscopy (FSIG) at age 60. METHODS A state-transition model was used to estimate costs and outcomes for each screening scenario vs no screening. A third party payer perspective was adopted. Probabilistic sensitivity analyses were undertaken. RESULTS All scenarios would be considered highly cost-effective compared with no screening. The lowest incremental cost-effectiveness ratio (ICER vs no screening euro 589 per quality-adjusted life-year (QALY) gained) was found for FSIG, followed by FIT euro 1696) and gFOBT (euro 4428); gFOBT was dominated. Compared with FSIG, FIT was associated with greater gains in QALYs and reductions in lifetime cancer incidence and mortality, but was more costly, required considerably more colonoscopies and resulted in more complications. Results were robust to variations in parameter estimates. CONCLUSION Population-based screening based on FIT is expected to result in greater health gains than a policy of gFOBT (with reflex FIT) or once-only FSIG, but would require significantly more colonoscopy resources and result in more individuals experiencing adverse effects. Weighing these advantages and disadvantages presents a considerable challenge to policy makers.
Collapse
Affiliation(s)
- L Sharp
- National Cancer Registry Ireland, Cork Airport Business Park, Building 6800, Kinsale Road, Cork, Ireland.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
[The Alliance for the Prevention of Colorectal Cancer in Spain. A civil commitment to society]. GASTROENTEROLOGIA Y HEPATOLOGIA 2012; 35:109-28. [PMID: 22365571 DOI: 10.1016/j.gastrohep.2012.01.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2012] [Accepted: 01/20/2012] [Indexed: 02/07/2023]
Abstract
Colorectal cancer (CRC) is the most common malignant tumor in Spain, when men and women are considered together, and the second leading cause of cancer death. Every week in Spain over 500 cases of CRC are diagnosed, and nearly 260 people die from the disease. Epidemiologic estimations for the coming years show a significant increase in the number of annual cases. CRC is a perfectly preventable tumor and can be cured in 90% of cases if detected in the early stages. Population-based screening programs have been shown to reduce the incidence of CRC and mortality from the disease. Unless early detection programs are established in Spain, it is estimated that in the coming years, 1 out of 20 men and 1 out of 30 women will develop CRC before the age of 75. The Alliance for the Prevention of Colorectal Cancer in Spain is an independent and non-profit organization created in 2008 that integrates patients' associations, altruistic non-governmental organizations and scientific societies. Its main objective is to raise awareness and disseminate information on the social and healthcare importance of CRC in Spain and to promote screening measures, early detection and prevention programs. Health professionals, scientific societies, healthcare institutions and civil society should be sensitized to this highly important health problem that requires the participation of all sectors of society. The early detection of CRC is an issue that affects the whole of society and therefore it is imperative for all sectors to work together.
Collapse
|
42
|
Feldstein AC, Perrin N, Liles EG, Smith DH, Rosales AG, Schneider JL, Lafata JE, Myers RE, Mosen DM, Glasgow RE. Primary care colorectal cancer screening recommendation patterns: associated factors and screening outcomes. Med Decis Making 2012; 32:198-208. [PMID: 21652776 PMCID: PMC3624016 DOI: 10.1177/0272989x11406285] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The relationship of a primary care provider's (PCP's) colorectal cancer (CRC) screening strategies to completion of screening is poorly understood. OBJECTIVE To describe PCP test recommendation patterns and associated factors and their relationship to patient test completion. DESIGN This cross-sectional study used a PCP survey, in-depth PCP interviews, and electronic medical records. SETTING Kaiser Permanente Northwest health maintenance organization. PARTICIPANTS Participants included 132 PCPs and 49,259 eligible patients aged 51 to 75. MEASUREMENTS The authors grouped PCPs by patterns of CRC screening recommendations based on reported frequency of recommending fecal occult blood testing (FOBT), flexible sigmoidoscopy (FS), and colonoscopy. They then compared PCP demographics, reported CRC screening test influences, concerns, decision-making and counseling processes, and actual rates of patient CRC screening completion by PCP group. RESULTS The authors identified 4 CRC screening recommendation groups: a "balanced" group (n = 54; 40.9%) that recommended the tests nearly equally, an FOBT group (n = 31; 23.5%) that largely recommended FOBT, an FOBT + FS group (n = 25; 18.9%), and a colonoscopy + FOBT group (n = 22; 16.7%) that recommended these tests nearly equally. Internal medicine (v. family medicine) PCPs were more common in groups more frequently recommending endoscopy. The FOBT and FOBT + FS groups were most influenced by clinical guidelines. Groups recommending more endoscopy were most concerned that FOBT generates a relatively high number of false positives and FOBT can miss cancers. The FOBT and FOBT + FS groups were more likely to recommend a specific screening strategy compared to the colonoscopy + FOBT and balanced groups, which were more likely to let the patient decide. CRC screening rates were 63.9% balanced, 62.9% FOBT, 61.7% FOBT + FS, and 62.2% colonoscopy + FOBT; rates did not differ significantly by group. LIMITATIONS Small numbers within PCP groups. CONCLUSIONS Specialty, the influence of guidelines, test concerns, and the "jointness" of the test selection decision distinguished CRC screening recommendation patterns. All patterns were associated with similar overall screening rates.
Collapse
Affiliation(s)
- Adrianne C. Feldstein
- Center for Health Research, Kaiser Permanente Northwest, Portland, OR, USA
- Northwest Permanente, Kaiser Permanente Northwest, Portland, OR, USA
| | - Nancy Perrin
- Center for Health Research, Kaiser Permanente Northwest, Portland, OR, USA
| | - Elizabeth G. Liles
- Center for Health Research, Kaiser Permanente Northwest, Portland, OR, USA
- Northwest Permanente, Kaiser Permanente Northwest, Portland, OR, USA
| | - David H. Smith
- Center for Health Research, Kaiser Permanente Northwest, Portland, OR, USA
| | | | | | - Jennifer E. Lafata
- Henry Ford Health System, Detroit, Michigan, USA and Medical College of Virginia at Virginia Commonwealth University, Richmond, VA
| | - Ronald E. Myers
- Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - David M. Mosen
- Center for Health Research, Kaiser Permanente Northwest, Portland, OR, USA
| | - Russell E. Glasgow
- Institute for Health Research, Kaiser Permanente Colorado, Denver, CO, USA
| |
Collapse
|
43
|
Abstract
INTRODUCTION Colorectal cancer (CRC) is one of the most serious health problems worldwide and thus it is important to assess health and economic impacts of preventative CRC screening strategies. METHODS For this reason, a theoretical model based on Markov chains is proposed to compare these strategies: fecal occult blood test, capsule endoscopy, once-life and twice-life colonoscopy, and no screening. The model predicts the health state of a population of individuals aged from 50 to 75 years. RESULTS The numerical results show that the optimal timing for a once-lifetime colonoscopy screening method is before the age of 50 and that the twice-lifetime colonoscopy is the best screening strategy with respect to CRC incidence. In contrast, it is the most expensive one if the CRC treatment costs are not included. The model predicts that there is a minimal CRC incidence in the population when the second colonoscopy is appropriately timed. By using specific data, this age was found to be 59 years. CONCLUSION The screening strategies probably save expenses on the treatment of the population and at the same time decreases mortality. Optimized twice-lifetime colonoscopy seems to be the most efficient strategy with respect to mortality and overall costs including subsequent treatment.
Collapse
|
44
|
Brenner H, Chang-Claude J, Seiler CM, Hoffmeister M. Long-term risk of colorectal cancer after negative colonoscopy. J Clin Oncol 2011; 29:3761-7. [PMID: 21876077 DOI: 10.1200/jco.2011.35.9307] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
PURPOSE Colonoscopy is thought to be a powerful and cost-effective tool to reduce colorectal cancer (CRC) incidence and mortality. Empirical evidence for overall and risk group-specific definition of screening intervals is sparse. We aimed to assess the risk of CRC according to time since negative colonoscopy, overall, and by sex, smoking, and family history of CRC, in a large population-based case-control study. PATIENTS AND METHODS In all, 1,945 patients with CRC and 2,399 population controls were recruited in 22 hospitals and through population registers in the Rhine-Neckar region of Germany from 2003 to 2007. Data on history of colonoscopy and important covariates were obtained by personal interviews and from medical records. RESULTS Compared with people who had never undergone colonoscopy, people with a previous negative colonoscopy had a strongly reduced risk of CRC. Adjusted odds ratios for time windows of 1 to 2, 3 to 4, 5 to 9, 10 to 19, and 20+ years after negative colonoscopy were 0.14 (95% CI, 0.10 to 0.20), 0.12 (95% CI, 0.08 to 0.19), 0.26 (95% CI, 0.18 to 0.39), 0.28 (95% CI, 0.17 to 0.45), and 0.40 (95% CI, 0.24 to 0.66), respectively. Low risks even beyond 10 years after negative colonoscopy were observed for both left- and right-sided CRC and in all risk groups assessed except current smokers, who had a risk similar to that of never smokers with no previous colonoscopy 10 or more years after a negative colonoscopy. CONCLUSION These results support suggestions that screening intervals for CRC screening by colonoscopy could be longer than the commonly recommended 10 years in most cases, perhaps even among men and people with a family history of CRC, but probably not among current smokers.
Collapse
Affiliation(s)
- Hermann Brenner
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg, Germany D-69120.
| | | | | | | |
Collapse
|