839 / 1816
Individual patient data to be presented
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Criteria:
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Randomised trials of post-mastectomy radiotherapy (RT)
versus same surgery but no RT
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Started before 2000
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Mastectomy and axillary dissection to at least level II
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RT to include chest wall
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Known pathological nodal status
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Found:
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3786 women in 14 trials (started 1964 to 1982)
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43 000 years of follow-up to 2009 (median 9.0 years)
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RT to axillary, internal mammary and supraclavicular nodes