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

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