Table 1 Characteristics of the study sample.
Radiation therapy alone (N = 37) | Chemotherapy and radiotherapy (N = 35) | Total (N = 72) | p-Valuea | |
|---|---|---|---|---|
Demographic characteristics | ||||
Age (years), mean ± SD | 57.3 ± 9.3 | 56.1 ± 11.2 | 56.7 ± 10.2 | 0.44 |
Ethnicity, N (%) | ||||
Hispanic | 5 (14) | 2 (6) | 7 (10) | 0.47 |
Non-Hispanic | 32 (86) | 33 (94) | 65 (90) | |
Education, N (%) | ||||
HS degree | 8 (22) | 8 (23) | 16 (22) | 0.41 |
College degree | 12 (43) | 16 (46) | 28 (39) | |
Postgraduate degree | 17 (46) | 11 (31) | 28 (39) | |
Body mass index, mean ± SD | 25.6 ± 5.3 | 25.7 ± 6.7 | 25.7 (6.0) | 0.96 |
Tobacco smoking, N (%) | ||||
Current | 1 (3) | 1 (3) | 2 (3) | 0.59 |
Former | 11 (30) | 7 (20) | 18 (25) | |
Never | 24 (65) | 27 (77) | 51 (71) | |
Menopausal status, N (%) | ||||
Pre-menopausal | 8 (22) | 9 (26) | 17 (24) | 0.64 |
Peri-menopausal | 1 (3) | 3 (8) | 4 (5) | |
Post-menopausal | 26 (70) | 22 (63) | 48 (67) | |
Hysterectomy | 2 (5) | 1 (3) | 3 (4) | |
Tumor characteristics | ||||
ER positive, N (%) | 36 (97) | 26 (74) | 62 (86) | 0.013 |
PR positive, N (%) | 32 (86) | 21 (60) | 53 (7) | 0.023 |
HER2 amplified, N (%) | 2 (5) | 2 (6) | 4 (5) | 0.95 |
Stage, N (%) | ||||
0 | 5 (13) | 0 (0) | 5 (7) | 0.00015 |
1 | 25 (68) | 11 (31) | 36 (50) | |
2 | 7 (19) | 18 (51) | 25 (35) | |
3 | 0 (0) | 5 (14) | 5 (7) | |
Type of surgery | ||||
Lumpectomy | 35 (94) | 27 (77) | 62 (86) | 0.032 |
Mastectomy | 2 (5) | 8 (23) | 10 (14) | |
