Characteristic | Adjuvant therapy | Total (n = 2105) | |||
---|---|---|---|---|---|
 | None (n = 956) | Chemotherapy alone(n = 610) | Radiotherapy alone (n = 143) | Combined chemotherapy and radiotherapy (n = 396) |  |
Age (years) | Â | Â | Â | Â | Â |
   <35 | 14 (1.5) | 43 (7.1) | 4 (2.8) | 24 (6.0) | 85 (4.1) |
   35–49 | 245 (25.6) | 390 (63.9) | 32 (22.4) | 251 (63.4) | 918 (43.6) |
   50–64 | 404 (42.3) | 161 (26.4) | 64 (44.7) | 106 (26.8) | 735 (34.9) |
   >64 | 293 (30.6) | 16 (2.6) | 43 (30.1) | 15 (3.8) | 367 (17.4) |
Ethnicity | Â | Â | Â | Â | Â |
   Chinese | 831 (86.9) | 525 (86.1) | 126 (88.1) | 338 (85.4) | 1820 (86.5) |
   Malay | 65 (6.8) | 62 (10.2) | 9 (6.3) | 40 (10.1) | 176 (8.3) |
   Indian | 46 (4.8) | 19 (3.1) | 7 (4.9) | 14 (3.5) | 86 (4.1) |
   Other | 14 (1.5) | 4 (0.6) | 1 (0.7) | 4 (1.0) | 23 (1.1) |
Menopausal status | Â | Â | Â | Â | Â |
   Premenopausal | 242 (25.3) | 406 (66.6) | 35 (24.5) | 267 (67.4) | 950 (45.1) |
   Uncertain | 91 (9.5) | 76 (12.5) | 12 (8.4) | 25 (6.3) | 204 (9.7) |
   Postmenopausal | 623 (65.2) | 128 (20.9) | 96 (67.1) | 104 (26.3) | 951 (45.2) |
ER/PR status | Â | Â | Â | Â | Â |
   +/+ | 363 (47.1) | 176 (32.6) | 53 (45.7) | 95 (27.9) | 687 (38.9) |
   +/- | 139 (18.0) | 63 (11.7) | 29 (25.0) | 61 (17.9) | 292 (16.5) |
   -/+ | 41 (5.3) | 37 (6.8) | 2 (1.7) | 21 (6.2) | 101 (5.7) |
   -/- | 228 (29.6) | 264 (48.9) | 32 (27.6) | 163 (48.0) | 687 (38.9) |
   Not done | 185 | 70 | 27 | 56 | 338 |
Pathologic T stage | Â | Â | Â | Â | Â |
   T1 | 488 (51.1) | 209 (34.3) | 38 (26.6) | 70 (17.7) | 805 (38.2) |
   T2 | 423 (44.3) | 368 (60.3) | 83 (58.0) | 249 (62.9) | 1123 (53.4) |
   T3 | 45 (4.7) | 33 (5.4) | 22 (15.4) | 77 (19.4) | 177 (8.4) |
Lymph node (N) status | Â | Â | Â | Â | Â |
   Positive | 243 (25.4) | 300 (49.2) | 74 (51.8) | 339 (85.6) | 956 (45.4) |
   Negative | 713 (74.6) | 310 (50.8) | 69 (48.2) | 57 (14.4) | 1149 (54.6) |
Histological grading | Â | Â | Â | Â | Â |
   Well | 164 (21.2) | 49 (8.8) | 17 (13.3) | 21 (5.7) | 251 (13.8) |
   Moderate | 369 (47.7) | 218 (39.2) | 57 (44.5) | 125 (34.1) | 769 (42.2) |
   Poor | 240 (31.1) | 289 (52.0) | 54 (42.2) | 221 (60.2) | 804 (44.1) |
   Not done | 183 | 54 | 15 | 29 | 281 |