Hospital records may be distorting cancer statistics

July 20, 2000

Effect of improved data collection on breast cancer incidence and survival: reconciliation of a registry with a clinical database

Variations in the way breast cancer is registered in hospitals is leading to missed cases and, as a result, may be distorting national cancer statistics - currently a principal means of identifying cancer "black spots" around the county, according to a study in this week's BMJ.

Researchers in Leicestershire compared breast cancer records for 1997 at Trent Cancer Registry with a local hospital database. They found that the recorded date of diagnosis was, on average, 26 days earlier on the hospital database than the date of registration, and 70 patients were assigned to a previous year. By the end of 1998, 134 patients listed on the hospital database were still not registered. Therefore, although only 535 breast cancers were recorded for 1997 at the cancer registry, 599 patients were finally identified - a 12% increase.

Adding the missing cases to the register increased the level of cancer and reduced the overall survival in the Trent region because the missing cases tended to be older with a lower life expectancy, explain the authors. These findings, they say, highlight the important influence of data collection on national cancer statistics, and stress that those who use them must bear this in mind, particularly when attempting to compare cancer incidence and survival in different centres and even countries.
-end-
Contact:

Anne Stotter, Consultant Surgeon, Glenfield Hospital NHS Trust, Leicester LE3 9QP Email: anne.stotter@glenfield-tr.trent.nhs.uk

BMJ

Related Breast Cancer Articles from Brightsurf:

Oncotarget: IGF2 expression in breast cancer tumors and in breast cancer cells
The Oncotarget authors propose that methylation of DVDMR represents a novel epigenetic biomarker that determines the levels of IGF2 protein expression in breast cancer.

Breast cancer: AI predicts which pre-malignant breast lesions will progress to advanced cancer
New research at Case Western Reserve University in Cleveland, Ohio, could help better determine which patients diagnosed with the pre-malignant breast cancer commonly as stage 0 are likely to progress to invasive breast cancer and therefore might benefit from additional therapy over and above surgery alone.

Partial breast irradiation effective treatment option for low-risk breast cancer
Partial breast irradiation produces similar long-term survival rates and risk for recurrence compared with whole breast irradiation for many women with low-risk, early stage breast cancer, according to new clinical data from a national clinical trial involving researchers from The Ohio State University Comprehensive Cancer Center - Arthur G.

Breast screening linked to 60 per cent lower risk of breast cancer death in first 10 years
Women who take part in breast screening have a significantly greater benefit from treatments than those who are not screened, according to a study of more than 50,000 women.

More clues revealed in link between normal breast changes and invasive breast cancer
A research team, led by investigators from Georgetown Lombardi Comprehensive Cancer Center, details how a natural and dramatic process -- changes in mammary glands to accommodate breastfeeding -- uses a molecular process believed to contribute to survival of pre-malignant breast cells.

Breast tissue tumor suppressor PTEN: A potential Achilles heel for breast cancer cells
A highly collaborative team of researchers at the Medical University of South Carolina and Ohio State University report in Nature Communications that they have identified a novel pathway for connective tissue PTEN in breast cancer cell response to radiotherapy.

Computers equal radiologists in assessing breast density and associated breast cancer risk
Automated breast-density evaluation was just as accurate in predicting women's risk of breast cancer, found and not found by mammography, as subjective evaluation done by radiologists, in a study led by researchers at UC San Francisco and Mayo Clinic.

Blood test can effectively rule out breast cancer, regardless of breast density
A new study published in PLOS ONE demonstrates that Videssa® Breast, a multi-protein biomarker blood test for breast cancer, is unaffected by breast density and can reliably rule out breast cancer in women with both dense and non-dense breast tissue.

Study shows influence of surgeons on likelihood of removal of healthy breast after breast cancer dia
Attending surgeons can have a strong influence on whether a patient undergoes contralateral prophylactic mastectomy after a diagnosis of breast cancer, according to a study published by JAMA Surgery.

Young breast cancer patients undergoing breast conserving surgery see improved prognosis
A new analysis indicates that breast cancer prognoses have improved over time in young women treated with breast conserving surgery.

Read More: Breast Cancer News and Breast Cancer Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.