Table 1.
Characteristics of patients with tissue available for microarray construction
| S8809 (N = 103) | S9800 (N = 30) | S9911 (N = 47) | |
| Male | 55 (53%) | 19 (63%) | 28 (60%) |
| Caucasian | 92 (89%) | 30 (100%) | 45 (96%) |
| Median age (range) | 47.4 (26.1–69.4) | 54.8 (27.8–75.5) | 49.9 (22.9–66.8) |
| Follicular grade | |||
| 1 | 48 (47%) | 12 (40%) | 22 (46%) |
| 2 | 34 (33%) | 15 (50%) | 15 (32%) |
| 3a | 14 (13%) | 2 (7%) | 5 (11%) |
| 3b | 0 (0%) | 1 (3%) | 0 (0%) |
| Missing | 7 (7%) | 0 (0%) | 5 (11%) |
| IPI score | |||
| 0 | 61 (59%) | 15 (50%) | 27 (58%) |
| 1 | 34 (33%) | 11 (37%) | 19 (40%) |
| 2/3 | 8 (8%) | 4 (13%) | 1 (2%) |
| IPI risk factors | |||
| Performance status >1 | 1 (1%) | 1 (3%) | 0 (0%) |
| >1 Extranodal sites | 15 (15%) | 4 (13%) | 13 (28%) |
| Lactate dehydrogenase > upper limit of normal | 28 (27%) | 9 (30%) | 5 (11%) |
| Age >60 | 7 (7%) | 9 (30%) | 6 (13%) |
| Stage 3 or greater | 102 (99%) | 29 (97%) | 42 (89%) |
| Randomized | 56 (54%) | N/A | N/A |
| Interferon arm | 34 (61% of 56) | N/A | N/A |
| 5-Year overall survival (%) | 80 | 83 | 85 |
IPI, international prognostic index.