Table 1 Tumour and patient characteristics, by DDRP mutation carrier status and previous RT exposure

Age at first BC, years

40.3

42.4

41.4

42.3

Age at second BC, years

48.1

51.8

51.1

54.2

Chemotherapy, n (percentage)

11 (27)

1 (10)

28 (22)

5 (7)

Tumour size, cm

1.8

2.9

2.2

2.3

Lymph node positive, n (percentage)

12 (29)

1 (10)

41 (32)

4 (6)

RT dose^a, Gy

   Mean (range)

1.49 (0.27–3.73)

1.55 (0.24–5.61)

   Median

1.32

1.40

   Third quartile

1.79

1.89