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    Risk stratification for prostate cancer management: value of the Cambridge Prognostic Group classification for assessing treatment allocation

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    Authors
    Parry, MG
    Cowling, TE
    Sujenthiran, A
    Nossiter, J
    Berry, B
    Cathcart, P
    Aggarwal, A
    Payne, H
    van der Meulen, J
    Clarke, Noel W
    Gnanapragasam, VJ
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    Affiliation
    Department of Health Services Research and Policy, London School of Hygiene and Tropical Medicine, London
    Issue Date
    2020
    
    Metadata
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    Abstract
    Background: The five-tiered Cambridge Prognostic Group (CPG) classification is a better predictor of prostate cancer-specific mortality than the traditional three-tiered classification (low, intermediate, and high risk). We investigated radical treatment rates according to CPG in men diagnosed with non-metastatic prostate cancer in England between 2014 and 2017. Methods: Patients diagnosed with non-metastatic prostate cancer were identified from the National Prostate Cancer Audit database. Men were risk stratified according to the CPG classification. Risk ratios (RR) were estimated for undergoing radical treatment according to CPG and for receiving radiotherapy for those treated radically. Funnel plots were used to display variation in radical treatment rates across hospitals. Results: A total of 61,999 men were included with 10,963 (17.7%) in CPG1 (lowest risk group), 13,588 (21.9%) in CPG2, 9452 (15.2%) in CPG3, 12,831 (20.7%) in CPG4, and 15,165 (24.5%) in CPG5 (highest risk group). The proportion of men receiving radical treatment increased from 11.3% in CPG1 to 78.8% in CGP4, and 73.3% in CPG5. Men in CPG3 were more likely to receive radical treatment than men in CPG2 (66.3% versus 48.4%; adjusted RR 1.44; 95% CI 1.36-1.53; P < 0.001). Radically treated men in CPG3 were also more likely to receive radiotherapy than men in CPG2 (59.2% versus 43.9%; adjusted RR, 1.18; 95% CI 1.10-1.26). Although radical treatment rates were similar in CPG4 and CPG5 (78.8% versus 73.3%; adjusted RR 1.01; 95% CI 0.98-1.04), more men in CPG5 had radiotherapy than men in CPG4 (79.9% versus 59.1%, adjusted RR 1.26; 95% CI 1.12-1.40). Conclusions: The CPG classification distributes men in five risk groups that are about equal in size. It reveals differences in treatment practices in men with intermediate-risk disease (CPG2 and CPG3) and in men with high-risk disease (CPG4 and CPGP5) that are not visible when using the traditional three-tiered risk classification. Keywords: CPG; Cambridge Prognostic Groups; Non-metastatic disease; Prostate cancer; Risk stratification; Treatment selection.
    Citation
    Parry MG, Cowling TE, Sujenthiran A, Nossiter J, Berry B, Cathcart P, et al. Risk stratification for prostate cancer management: value of the Cambridge Prognostic Group classification for assessing treatment allocation. BMC Med. 2020;18(1):114.
    Journal
    Bmc Medicine
    URI
    http://hdl.handle.net/10541/623127
    DOI
    10.1186/s12916-020-01588-9
    PubMed ID
    32460859
    Additional Links
    https://dx.doi.org/10.1186/s12916-020-01588-9
    Type
    Article
    Language
    en
    ae974a485f413a2113503eed53cd6c53
    10.1186/s12916-020-01588-9
    Scopus Count
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