From: Second malignancies in breast cancer patients following radiotherapy: a study in Florence, Italy
Age-at-risk (years) | 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 |
---|---|---|---|---|
<50 | 0.84 (0.37, 2.02) | 0.70 (0.29, 1.65) | 11/569 (1.9%) | 12/607 (2.0%) |
50 to 64 | 1.14 (0.69, 1.87) | 1.02 (0.62, 1.68) | 28/926 (3.0%) | 41/1,154 (3.6%) |
65+ | 1.69 (1.05, 2.73)* | 1.65 (1.02, 2.68)* | 34/482 (7.1%) | 41/1,022 (4.0%) |