Table 5

Frequencies of CBC patients carrying apathogenic DNA-damage repair pathway mutation

Interval (years)
All CBC patients
Previous RT
No RT
Carriers versus non-carriers

n
Percentage
n
Percentage
n
Percentage
OR for CBC after RT
95% CI
p

1–5 (n = 66)
15/66
22.7
12/49
24.5
3/16
18.8
1.41
0.34–5.78

>5 (n = 181)
36/181
19.9
29/120
24.1
7/62
11.3
2.51
1.03–6.10
0.049

All contralateral breast cancer (CBC) patients, and patients stratified by previous radiation exposure are presented, according to interval between first and second primary breast cancer (less than 5 and more than 5 years). Odds ratio (OR) and 95% confidence interval (CI) are given for mutation carriers versus non-carriers to develop radiation-associated breast cancer. RT, radiation treatment.

Broeks et al. Breast Cancer Research 2007 9:R26   doi:10.1186/bcr1668

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