Table 2.
Patient and tumor characteristics
| Demographic and tumor characteristics | Patients n (%) | No. of deaths | MST (months) | p-valuea |
|---|---|---|---|---|
| Age at diagnosis (years) (n = 441) | ||||
| >40 | 30 (7) | 11 | 99.7 | 0.76 |
| 40–49 | 71 (16) | 20 | 113.6 | |
| 50–59 | 97 (22) | 28 | 116.9 | |
| 60–69 | 103 (23) | 29 | 107.1 | |
| ≥70 | 140 (32) | 34 | 108.1 | |
| Missing | 0 (0) | – | – | |
| Family history (n = 253) | ||||
| No | 161 (37) | 53 | 108.0 | 0.05 |
| Yes | 92 (21) | 20 | 117.0 | |
| Missing | 188 (43) | – | – | |
| Tumor grade (n = 343) | ||||
| I | 43 (10) | 3 | 144.3 | <0.001 |
| II | 150 (34) | 35 | 116.3 | |
| III | 145 (33) | 54 | 97.4 | |
| IV | 5 (1) | 3 | 78.8 | |
| Missing | 98 (22) | – | – | |
| Tumor stage (n = 429) | ||||
| I | 122 (28) | 10 | 143.5 | <0.001 |
| II | 232 (53) | 67 | 109.7 | |
| III | 58 (13) | 27 | 75.8 | |
| IV | 17 (4) | 16 | 24.1 | |
| Missing | 12 (3) | – | – | |
| Tumor size (n = 420) | ||||
| <2.0 cm | 182 (41) | 27 | 132.7 | <0.001 |
| ≥2.0 cm | 238 (54) | 92 | 97.7 | |
| Missing | 21 (5) | – | – | |
| Nodal status (n = 441) | ||||
| Negative | 235 (53) | 33 | 135.0 | <0.001 |
| Positive | 206 (47) | 89 | 90.0 | |
| Missing | 0 (0) | – | – | |
| ER status (n = 438) | ||||
| Negative | 130 (29) | 53 | 91.6 | <0.001 |
| Positive | 308 (70) | 69 | 121.8 | |
| Missing | 3(1) | – | ||
| PR status (n = 437) | ||||
| Negative | 130 (29) | 51 | 94.3 | <0.001 |
| Positive | 307 (70) | 70 | 121.0 | |
| Missing | 4 (1) | – | – | |
| Cancer treatment | ||||
| Hormone therapy | ||||
| Yes (%) | 143 (33) | 39 | 116 | 0.68 |
| No (%) | 295 (67) | 83 | 111 | |
| Chemotherapy | ||||
| Yes (%) | 135 (31) | 57 | 93.8 | |
| No (%) | 306 (69) | 65 | 124.4 | <0.001 |
| Radiation therapy | ||||
| Yes (%) | 93 (21) | 39 | 93 | <0.001 |
| No (%) | 348 (79) | 83 | 120 |
Categorical entries are counts (%)
MST restricted mean survival time in months; ER estrogen receptor; PR progesterone receptor
Restricted mean is reported instead of the median, due to >50% survival in the majority of cases
a
Differences in survival tested by the chi-square test for comparing cumulative-incidence curves