Table 1.
Characteristics of women with early-stage breast cancer (n = 185) and women from the reference population (ref. pop.: n = 548)
| Patients | Ref. pop. | p value | |
|---|---|---|---|
| General practice, n (%) | 0.926a | ||
| Groningen | 64 (34.6) | 182 (33.2) | |
| Hoogeveen | 55 (29.7) | 170 (31.0) | |
| Sappemeer | 66 (35.7) | 196 (35.8) | |
| Age at diagnosis, median (range), years | 56.2 (27.4–96.0) | 55.8 (26.8–94.8) | 0.854b |
| T stage, n (%) | |||
| Tis | 15 (8.6) | ||
| T1 | 83 (47.7) | ||
| T2/T3/T4 | 76 (43.7) | ||
| Unknown | 11 | ||
| N stage, n (%) | |||
| N0 | 112 (62.6) | ||
| N+ | 67 (37.4) | ||
| Unknown | 6 | ||
| Surgery, n (%) | |||
| None | 3 (1.6) | ||
| Lumpectomy | 2 (1.1) | ||
| Lumpectomy + radiation therapy | 93 (50.3) | ||
| Mastectomyc | 61 (33.0) | ||
| Mastectomyc + radiation therapy | 26 (14.1) | ||
| Systemic treatment, n (%) | |||
| None | 85 (45.9) | ||
| Chemotherapy | 20 (10.8) | ||
| Endocrine therapy | 36 (19.5) | ||
| Chemotherapy + endocrine therapy | 44 (23.8) | ||
| Early endpoints in year since diagnosis, n (%) | |||
| Recurrent breast cancer | 1 (0.5) | ||
| Departure | 3 (1.6) | 10 (1.8) | |
| Death | 1 (0.5) | 11 (2.0) | |
| Other | 0 (0.0) | 3 (0.5) | |
| Observation time, median (range), days | |||
| Period before diagnosis | 365.0 (4.0–366.0) | 365.0 (4.0–366.0) | 0.716b |
| Period since diagnosis | 365.0 (33.0–366.0) | 365.0 (10.0–366.0) | 0.922b |
aChi-square test
bMann–Whitney test
cIncluding patients treated with lumpectomy followed by mastectomy