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SAMJ: South African Medical Journal

On-line version ISSN 2078-5135
Print version ISSN 0256-9574

Abstract

SINGH, E et al. South African National Cancer Registry: Effect of withheld data from private health systems on cancer incidence estimates. SAMJ, S. Afr. med. j. [online]. 2015, vol.105, n.2, pp.107-109. ISSN 2078-5135.  http://dx.doi.org/10.7196/samj.8858.

BACKGROUND: The National Cancer Registry (NCR) was established as a pathology-based cancer reporting system. From 2005 to 2007, private health laboratories withheld cancer reports owing to concerns regarding voluntary sharing of patient data. OBJECTIVES: To estimate the impact of under-reported cancer data from private health laboratories. METHODS: A linear regression analysis was conducted to project expected cancer cases for 2005 - 2007. Differences between actual and projected figures were calculated to estimate percentage under-reporting. RESULTS: The projected NCR case total varied from 53 407 (3.8% net increase from actual cases reported) in 2005 to 54 823 (3.7% net increase) in 2007. The projected number of reported cases from private laboratories in 2005 was 26 359 (19.7% net increase from actual cases reported), 27 012 (18.8% net increase) in 2006 and 27 666 (28.4% net increase) in 2007. CONCLUSION: While private healthcare reporting decreased by 28% from 2005 to 2007, this represented a minimal impact on overall cancer reporting (net decrease of <4%).

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