117 / 1498
HR = 0.87
95% CI: 0.51–1.47
p
= 0.60
Time (months)
Rituximab maintenance
Observation
6
0
12
24
30
42
48
60
Overall survival
0.8
0.6
0.4
0.2
0
1.0
505
513
499
492
483
365
246
22
507
501
492
381
243
26
1
0
18
36
54
474
472
108
97
–
–
Rituximab
Observation
Patients at risk
Salles G, et al. Lancet 2011; 377:42–51.
PRIMA: Overall survival