Sequencing of chemotherapy and radiation therapy for early breast cancer

Hickey, Brigid E., Francis, Daniel P. and Lehman, Margot (2006) Sequencing of chemotherapy and radiation therapy for early breast cancer. Cochrane Database of Systematic Reviews, 4: CD005212.1-CD005212.20. doi:10.1002/14651858.CD005212.pub2


Author Hickey, Brigid E.
Francis, Daniel P.
Lehman, Margot
Title Sequencing of chemotherapy and radiation therapy for early breast cancer
Journal name Cochrane Database of Systematic Reviews   Check publisher's open access policy
ISSN 1469-493X
Publication date 2006
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1002/14651858.CD005212.pub2
Issue 4
Start page CD005212.1
End page CD005212.20
Total pages 20
Place of publication Oxford, United Kingdom
Publisher John Wiley & Sons
Collection year 2006
Language eng
Subject C1
321015 Oncology and Carcinogenesis
730108 Cancer and related disorders
1112 Oncology and Carcinogenesis
Formatted abstract
Background
After surgery for localised breast cancer, adjuvant radiotherapy improves both local control and breast cancer specific survival. In patients at risk of harbouring micro-metastatic disease, adjuvant chemotherapy improves 15-year survival. However, the best sequence of administering these two types of adjuvant therapy for early stage breast cancer is not clear.

Objectives
To determine the effects of different sequencing of chemotherapy and radiotherapy for women with early breast cancer.

Search strategy
We searched the Cochrane Breast Cancer Group Specialized Register (10 March 2005). Details of the search strategy and methods of coding are described in the Group's module in The Cochrane Library. We extracted studies that had been coded as 'early', 'chemotherapy' and 'radiotherapy'.

Selection criteria
Randomised controlled trials evaluating different sequencing of chemotherapy and radiotherapy were included.

Data collection and analysis
We assessed the eligibility and quality of the identified studies and extracted data from the published reports of the included studies. We derived odds ratios (OR) and risk ratios from the available numerical data. Hazard ratios were extracted directly from text. Toxicity data were extracted, where reported. We used a fixed-effect model for meta-analysis and conducted analyses on the basis of the method of sequencing of the two treatments.

Main results
Three trials reporting two different sequencing comparisons were identified. There were no significant differences between the various methods of sequencing adjuvant therapy for survival, distant metastases or local recurrence, based on 853 randomised patients in two trials. One of these two trials (647 women) provided data on toxicity. Haematological toxicity (OR 1.43, confidence interval (CI) 1.01 to 2.03) and oesophageal toxicity (OR 1.44, CI 1.03 to 2.02) were significantly increased with concurrent therapy, and nausea and vomiting were significantly decreased (OR 0.70, CI 0.50 to 0.98). Other measures of toxicity did not differ between the two types of sequencing. On the basis of one trial (244 women), radiotherapy before chemotherapy was associated with a significantly increased risk of neutropenic sepsis (OR 2.96, 95%CI 1.26 to 6.98) compared with chemotherapy before radiotherapy, but other measures of toxicity were not significantly different.

Authors' conclusions
The data included in this review, from three well conducted randomised trials, suggest that different methods of sequencing chemotherapy and radiotherapy do not appear to have a major effect on survival or recurrence for women with breast cancer if radiation therapy is commenced within 7 months after surgery.
Keyword Chemotherapy
Radiation
Breast cancer
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Art No. CD005212. Publication status and date: Edited (no change to conclusions), published in Issue 1, 2009. Review content assessed as up-to-date: 9 March 2005.

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: Excellence in Research Australia (ERA) - Collection
2007 Higher Education Research Data Collection
ERA 2012 Admin Only
School of Medicine Publications
 
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Created: Thu, 16 Aug 2007, 10:07:40 EST