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Table 2 In-breast true recurrence (IBTR) and out-field local recurrence (LR) at 5 and 10 years

From: IOERT versus external beam electrons for boost radiotherapy in stage I/II breast cancer: 10-year results of a phase III randomized study

Treatment IBTR number at 5 years Risk of recurrence at 5 years IBTR number at 10 years Risk of recurrence at 10 years Log-rank test p value
IOERT 1 0.8% 3 4.3% 0.493
EBRT 4 4.2% 1 5.3%
Treatment Out-field LR number at 5 years Risk of recurrence at 5 years Out-field LR number at 10 years Risk of recurrence at 10 years Log-rank test p value
IOERT 6 4.7% 9 7.9% 0.611
EBRT 5 5.2% 9 10.3%