Skip to main content

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.