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Table 1 Characteristics in patients treated with mastectomy by type of adjuvant therapy received

From: Confirmation of double-peaked time distribution of mortality among Asian breast cancer patients in a population-based study

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)      
   <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      
   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      
   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      
   +/+ 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      
   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      
   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      
   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
  1. Values are expressed as number (%). ER, oestrogen receptor; PR, progesterone receptor.