The effect of mammographic screening on invasive breast cancer in Western Australia

Jamrozik, K, Byrne, MJ, Dewar, JM, Harvey, JM, Ingram, DM, Parsons, RW and Watson, N (2000) The effect of mammographic screening on invasive breast cancer in Western Australia. Medical Journal of Australia, 172 5: 203-206.

Author Jamrozik, K
Byrne, MJ
Dewar, JM
Harvey, JM
Ingram, DM
Parsons, RW
Watson, N
Title The effect of mammographic screening on invasive breast cancer in Western Australia
Journal name Medical Journal of Australia   Check publisher's open access policy
ISSN 0025-729X
Publication date 2000-01-01
Sub-type Article (original research)
Volume 172
Issue 5
Start page 203
End page 206
Total pages 4
Language eng
Abstract Objective: To determine whether mammographic screening has affected the presentation of invasive breast cancer in Western Australia. Design: Population-based reviews of the presentation of all invasive breast cancers diagnosed in Western Australia in 1989 and 1994. Setting: Western Australia (population 1.8 million), Active recruitment of women aged 50-69 years for mammographic screening began in 1989. Main outcome measures: Size and stage of invasive breast cancers at diagnosis. Results: From 1989 to 1994, the age-standardised incidence rose from 109 to 123 per 100 000 woman-years, based on 584 and 750 cases, respectively. The proportion of all invasive breast cancers detected as a result of a mammogram increased from 9.2% in 1989 to 34.5% in 1994. Among the cases where relevant information was recorded, the proportion of impalpable tumours increased from 7.7% in 1989 to 27.6% in 1994, and the average size of palpable tumours fell. There was an unexpected increase in the proportion of tumours that were negative on assays for oestrogen and progesterone receptors. Conclusions: A relatively simple and inexpensive clinical review has boosted confidence that the outlay of public monies required to establish and conduct screening in Australia appears likely to yield the reductions in mortality from breast cancer that would be predicted on the basis of the earlier controlled trials of mammography.
Keyword Medicine, General & Internal
Mastectomy
Diagnosis
Program
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Public Health Publications
 
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Created: Mon, 13 Aug 2007, 21:39:17 EST