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Table 2 Demographic and tumor characteristics among propensity-matched population with pure mucinous breast cancer

From: Effect of postoperative radiotherapy in women with localized pure mucinous breast cancer after lumpectomy: a population-based study

 

RT

Non-RT

Standardized difference

Characteristics

No

%

No

%

Patients

2149

50.0

2149

50.0

 

Age of diagnosis, years

Mean (SD)

70 (11.9)

 

71 (12.9)

 

0.081

 < 50

163

7.6

194

9.0

0.050

50–59

233

10.8

232

10.8

0.000

60–69

463

21.5

380

17.7

0.096

 ≥ 70

1290

60.0

1343

62.5

0.051

Era of diagnosis

1998–2004

792

36.9

731

34.0

0.061

2005–2009

585

27.2

673

31.3

0.090

2010–2015

772

35.9

745

35.3

0.011

Race

White

1769

82.3

1782

82.9

0.015

Black

186

8.7

202

9.4

0.026

Other

194

9.0

165

7.7

0.047

Marital status

Married

932

43.3

956

44.5

0.022

Non-married

215

10.0

227

10.6

0.020

DSW

902

42.0

880

40.9

0.022

Unknown

100

4.7

86

4.0

0.033

Laterality

Left

1124

52.3

1139

53.0

0.014

Right

1025

47.7

1010

47.0

0.014

Tumor size (T stage), cm

Mean (SD)

1.4 (0.7)

 

1.4 (0.7)

 

0.000

 ≤ 1.0 (T1)

817

38.0

822

38.3

0.006

1.1–2.0 (T1)

985

45.8

1009

47.0

0.024

2.1–3.0 (T2)

347

16.1

318

14.8

0.036

Tumor grade

I

1164

54.2

1212

56.4

0.044

II

566

26.3

558

26.0

0.007

III

45

2.1

46

2.1

0.000

IV

4

0.2

4

0.2

0.000

unknown

370

17.2

329

15.3

0.052

ER status

Positive

1912

89.0

1952

90.8

0.060

Negative

34

1.6

30

1.4

0.012

Unknown

203

9.4

167

7.8

0.058

PR status

Positive

1732

80.6

1754

81.6

0.027

Negative

182

8.5

186

8.7

0.005

Unknown

235

10.9

209

9.7

0.039

Chemotherapy

No/Unknown

2019

94.0

2040

94.9

0.039

Yes

130

6.0

109

5.1

0.039

  1. RT radiotherapy, SD standard deviation, DSW divorced, separated and widowed