ArticleSouth African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde2015
South African National Cancer Registry: Effect of withheld data from private health systems on cancer incidence estimates.
Article in South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
26 citing papers in PubMed, 1 synthesis or guideline pooled it.
- From habits of attrition to modes of inclusion: enhancing the role of private practitioners in routine disease surveillance.BMC health services research · 2017Pooled it
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- Race-specific temporal trends of HPV-related cancers in South Africa: An analysis of the South African National Cancer Registry, 2011-2022.International journal of cancer · 2026Article
- Integration of HIV Status in Cancer Surveillance in South Africa: A Call for Action.Cancer medicine · 2026Article
- Establishing cancer registries in Africa - focus on hepatopancreatobiliary cancers.Nature reviews. Gastroenterology & hepatology · 2026Review
- Digital oncology frameworks in Africa: a scoping review of architectural patterns, digital maturity, and data equity implications.Frontiers in public health · 2026Article
- Changes in incidence of HPV-related cancers in South Africa (2011-21): a cross-sectional analysis of the South African National Cancer Registry.The Lancet. Global health · 2025Article
- Differences in the incidence and mortality of tracheal, bronchus, and lung cancer between the Global Cancer Observatory 2022 and the Global Burden of Disease 2021.Journal of the National Cancer Center · 2025Article
- Multimorbidity Patterns and Functioning Associations Among Adults in a Local South African Setting: A Cross-Sectional Study.International journal of environmental research and public health · 2025Article
- Genetic insights: High germline variant rate in an indigenous African cohort with early-onset colorectal cancer.Frontiers in oncology · 2023Article
- Risk factors for breast cancer among women in Ekurhuleni Metropolitan Municipality, Gauteng province of South Africa, 2017‒2020: a case-control study.Ecancermedicalscience · 2023Article
- Cancer in sub-Saharan Africa: a Lancet Oncology Commission.The Lancet. Oncology · 2022Review
- Article
- Spatiotemporal modelling and mapping of cervical cancer incidence among HIV positive women in South Africa: a nationwide study.International journal of health geographics · 2021Article
- Reporting Incidences of Neuroblastoma in Various Resource Settings.JCO global oncology · 2021Article
- Colorectal cancer incidence and mortality trends by sex and population group in South Africa: 2002-2014.BMC cancer · 2021Article
- Aberrant Splicing Events and Epigenetics in Viral Oncogenomics: Current Therapeutic Strategies.Cells · 2021Review
- Establishing and Evaluating Cancer Surveillance System in KwaZulu-Natal, South Africa.Cancer informatics · 2021Article
- Genomics and splicing events of type II endometrial cancers in the black population: racial disparity, socioeconomic and geographical differences.American journal of cancer research · 2020Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
Abstract
backgroundThe 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.
objectivesTo estimate the impact of under-reported cancer data from private health laboratories.
methodsA 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.
resultsThe 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.
conclusionWhile 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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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.