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Table 2 Comparison of clinicopathological characteristics of breast cancer according to timing of recurrence as early and late recurrence*

From: Introducing novel and comprehensive models for predicting recurrence in breast cancer using the group LASSO approach: are estimates of early and late recurrence different?

Variables

Rec < 5 years (n = 561)

Rec > 5 years (n = 151)

No rec > 10 years (n = 561)

p value

Age, years

54.25 ± 11.76

59.18 ± 9.67

60.26 ± 9.86

< 0.001

Number of pregnancies

1.29 ± 2.29

1.39 ± 2.25

1.92 ± 2.43

< 0.001

Number of abortions

0.22 ± 0.703

0.20 ± 0.62

0.28 ± 0.66

0.287

Number of children

1.24 ± 2.176

1.35 ± 2.20

1.83 ± 2.32

< 0.001

Breast feeding duration, months

20.12 ± 39.71

20.64 ± 35.56

29.43 ± 47.19

0.001

Tumor size, cm

3.21 ± 1.80

0.50 ± 1.46

2.87 ± 1.53

< 0.001

Duration of sports activity, h/week

0.57 ± 2.30

0.05 ± 1.46

0.79 ± 1.87

< 0.001

Breast side involvement, no. (%)

 Left

311 (56)

68 (45.6)

285 (50.8)

0.040

 Right

244 (44)

81 (54.4)

276 (49.2)

 

Hormone replacement therapy, no. (%)

 Yes

3 (1.4)

2 (3.3)

5 (0.9)

0.611

 No

204 (98.6)

58 (96.7)

556 (99.1)

 

Diabetes, no. (%)

 Yes

35 (6.2)

20 (13.2)

75 (13.4)

< 0.001

 No

526 (93.8)

131 (86.8)

486 (86.6)

 

History of breast disease, no. (%)

 Yes

13 (2.3)

1 (0.7)

9 (1.6)

0.355

 No

548 (97.7)

150 (99.3)

552 (98.4)

 

History of breast operation, no. (%)

 Yes

2 (0.4)

3 (2)

7 (1.2)

0.112

 No

559 (99.6)

148 (98)

554 (98.8)

 

Family Hx of breast cancer, no. (%)

 Yes

57 (10.2)

16 (10.6)

76 (13.5)

0.190

 No

504 (89.8)

135 (89.4)

485 (86.5)

 

Family Hx of other cancer, no. (%)

 Yes

82 (14.6)

39 (25.8)

124 (22.1)

0.001

 No

479 (85.4)

112 (74.2)

437 (77.9)

 

Smoking, no. (%)

 Yes

5 (0.9)

0

2 (0.4)

0.299

 No

556 (99.1)

151 (100)

559 (99.6)

 

Waterpipe use, no. (%)

 Yes

22 (3.9)

4 (2.6)

26 (4.6)

0.531

 No

539 (96.1)

147 (97.4)

535 (95.4)

 

Sports activity, no. (%)

 Yes

68 (12.1)

19 (12.6)

104 (18.5)

0.007

 No

493 (87.9)

132 (87.4)

457 (81.5)

 

Regular sports activity, no. (%)

 Yes

24 (4.3)

8 (5.3)

47 (8.4)

0.015

 No

537 (95.7)

143 (94.7)

514 (91.6)

 

Lymph node management, no. (%)

 SLNB

48 (8.6)

6 (4)

506 (90.2)

< 0.001

 AND

438 (78.1)

126 (83.4)

13 (2.3)

 

 Both

34 (6.1)

3 (2)

3 (0.5)

 

 None

41 (7.3)

16 (10.6)

39 (7)

 

In situ component, no. (%)

 Yes

310 (69.7)

55 (69.6)

191 (34)

0.578

 No

135 (30.3)

24 (30.4)

370 (66)

 

Tumor necrosis, no. (%)

 Yes

264 (58.3)

33 (39.8)

132 (23.5)

< 0.001

 No

189 (41.7)

50 (60.2)

429 (76.5)

 

Chemotherapy before surgery, no. (%)

 Yes

53 (9.4)

7 (4.6)

49 (8.7)

0.169

 No

508 (90.6)

144 (95.4)

512 (91.3)

 

Chemotherapy after surgery, no. (%)

 Yes

547 (97.5)

148 (98)

541 (96.4)

0.438

 No

14 (2.5)

3 (2)

20 (3.6)

 

Radiotherapy, no. (%)

 Mastectomy with radiotherapy

166 (29.6)

139 (92.1)

265 (47.2)

< 0.001

 Mastectomy without radiotherapy

2 (0.4)

0

123 (21.9)

 

 BCS with radiotherapy

380 (67.7)

10 (6.6)

172 (30.7)

 

 BCS without radiotherapy

13 (2.3)

2 (1.3)

1 (0.2)

 

Hormone therapy, no. (%)

 Yes

303 (76.7)

101 (88.6)

365 (86.3)

< 0.001

 No

92 (23.3)

13 (11.4)

58 (13.7)

 

Stage, no. (%)

 0

129 (23)

12 (7.9)

116 (20.7)

< 0.001

 1

278 (49.6)

84 (55.6)

302 (53.8)

 

 2

134 (23.9)

48 (31.8)

126 (22.5)

 

 3 and 4

20 (3.6)

7 (4.6)

17 (3)

 

Grade, no. (%)

 1, 2

448 (79.9)

137 (90.7)

511 (91.1)

< 0.001

 3

113 (13.9)

14 (9.3)

50 (8.9)

 
  1. Rec recurrence; SLNB sentinel lymph node biopsy; AND axillary node dissection; BCS breast conserving surgery
  2. *All plus minus values are means ± standard deviations unless stated otherwise