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Table 7 Relative risk of site-specific second cancers among patients given radiotherapy

From: Second malignancies in breast cancer patients following radiotherapy: a study in Florence, Italy

Cancer type Follow-up RRaunadjusted for chemotherapy and hormonal therapy (95% CIb) RRaadjusted for chemotherapy and hormonal therapy (95% CIb) Cases/women with radiotherapy Cases/women with no radiotherapy
Leukaemia > = 2 years 8.13 (0.96, 69.10)** 6.67 (0.76, 58.00) 7/2,339 (0.3%) 1/2377 (0.04%)
Contralateral breast cancer > = 5 years 0.87 (0.58, 1.32) 0.82 (0.54, 1.24) 41/1,267 (3.2%) 67/1,813 (3.7%)
All other cancers combined > = 5 years 1.84 (1.06, 3.16)* 1.70 (0.98, 2.94)** 29/1,267 (2.3%) 29/1,813 (1.6%)
  1. *P <0.05; ** P = 0.055.
  2. a Relative risk.
  3. b Confidence interval.