Table 1.
Clinical Characteristics of Study Population (N=6,983 Chinese Women)
| Characteristic* | Stage 1** | Stage 2** |
|---|---|---|
| Patients, N | 2,884 | 4,099 |
| Mean Follow-up Time, years | 5.7 (1.9) | 4.0 (1.4) |
| Age at Diagnosis, years | 51.8 (9.6) | 53.7 (10.1) |
| TNM Stage of Disease | ||
| 0–I | 869 (32.9) | 1,425 (37.7) |
| II | 1,477 (56.0) | 1,948 (51.6) |
| III–IV | 292 (11.1) | 406 (10.7) |
| Estrogen Receptor Status | ||
| Positive | 1,570 (65.1) | 2,527 (64.3) |
| Negative | 842 (34.9) | 1,406 (35.8) |
| Progesterone Receptor Status | ||
| Positive | 1,482 (61.6) | 2,271 (58.0) |
| Negative | 923 (38.4) | 1,647 (42.0) |
| Surgery | ||
| Yes | 2,853 (99.4) | 4,053 (99.5) |
| No | 16 (0.6) | 22 (0.5) |
| Chemotherapy | ||
| Yes | 2,646 (92.4) | 3,687 (90.5) |
| No | 218 (7.6) | 388 (9.5) |
| Radiotherapy | ||
| Yes | 883 (32.5) | 1,288 (31.6) |
| No | 1,837 (67.5) | 2,785 (68.4) |
| Tamoxifen | ||
| Yes | 1,432 (65.4) | 1,932 (50.8) |
| No | 758 (34.6) | 1,870 (49.2) |
*
Mean (standard error) or N (%) for each variable
**
Column percents may not sum to 100 due to rounding error