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. 2020 Aug 20;10(8):e037719. doi: 10.1136/bmjopen-2020-037719

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: https://creativecommons.org/licenses/by/4.0/.

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Positive Predictive Value of cancer diagnoses for each combination of sources when compared with the main gold standard algorithm. Percentage of incident cancers defined using the first ever record in each combination of sources confirmed by a gold standard algorithm that considers confirmatory and contradictory data from each source. Cancer sites are ordered according to corresponding codes from the International Classification of Diseases, version 10 (ICD-10). *Four most common cancer sites. CNS, central nervous system; NHL, Non-Hodgkin's lymphoma; CPRD, Clinical Practice Research Datalink; HES APC, Hospital Episode Statistics Admitted Patient Care data; NCRAS, National Cancer Registration and Analysis Service; ONS, Office of National Statistics.