Table 1.
Demographics, Tumor Characteristics, and Follow-Up for 66 Patients with Normal Axillary Ultrasound Randomized to No Surgical Axillary Staging (Arm 1) vs Sentinel Lymph Node Biopsy (Arm 2)
| Characteristic | Total n = 66 | Arm 1 n = 34 | Arm 2 n = 32 | p Value |
|---|---|---|---|---|
| Patient demographic | 0.106 | |||
| Median age, y, (range) | 60 (31-81) | 61 (40-80) | 59 (31-81) | |
| Median follow-up, months, (range) | 17 (1-32) | 17 (2-32) | 18 (1-32) | |
| Tumor histology, n (%) | 0.143 | |||
| Invasive ductal carcinoma | 58 (88) | 32 (94) | 26 (81) | |
| Invasive lobular carcinoma | 7 (11) | 1 (3) | 6 (19) | |
| Other histology | 1 (2) | 1 (3) | 0 (0) | |
| Tumor size, n (%) | 0.256 | |||
| T1a/mi | 5 (8) | 4 (12) | 1 (3) | |
| T1b | 22 (33) | 10 (29) | 12 (38) | |
| T1c | 27 (41) | 16 (47) | 11 (34) | |
| T2 | 12 (18) | 4 (12) | 8 (25) | |
| Tumor grade, n (%) | 0.595 | |||
| Tumor grade I | 25 (38) | 14 (41) | 11 (34) | |
| Tumor grade II | 28 (42) | 12 (35) | 16 (50) | |
| Tumor grade III | 12 (18) | 7 (21) | 5 (16) | |
| Tumor grade unknown | 1 (2) | 1 (3) | 0 (0) | |
| ER status, n (%) | 0.668 | |||
| ER+ | 61 (92) | 32 (94) | 29 (91) | |
| ER− | 5 (8) | 2 (6) | 3 (9) | |
| PR status, n (%) | 0.428 | |||
| PR+ | 59 (89) | 29 (85) | 30 (94) | |
| PR− | 7 (11) | 5 (15) | 2 (6) | |
| HER2 status, n (%) | 0.140 | |||
| HER2+ | 5 (8) | 3 (9) | 2 (6) | |
| HER2− | 57 (86) | 27 (80) | 30 (94) | |
| HER2 unknown or equivocal | 4 (6) | 4 (12) | 0 (0) |
ER, estrogen receptor; PR, progesterone receptor; HER2, Human epidermal receptor 2