874 / 1674
Cumulative incidence of
de novo
breast induration grades 2-3
3 years: whole breast 6.4%
partial breast 4.8%
4 years: whole breast 8.3%
partial breast 7.7%
0 6 12 18 24 30 36 42 48 54 60
Moderate/Severe fibrosis (%)
0
10
20
30
40
50
HR: 0.76 (0.39-1.47)
16%
11%
WBI
(336 pts)
PBI
(344 pts)
645 pts
P = 0.41
11
6%
Cumulative incidence of
de novo
induration
WBI
PBI