Table 1 Baseline characteristics of early-stage low-risk male breast cancer patients stratified by primary treatment (2000–2021).

Total

765 (100)

95 (100)

670 (100)

-

Age, years

0.027

Median age, year (range)

75 (65–90)

72 (65–90)

75 (65–90)

65–75

415

63 (66.3)

352 (52.5)

> 75

350

32 (33.7)

318 (47.5)

Gender

-

Male

765 (100)

95 (100)

670 (100)

Clinical stage

0.804

I

523 (68.4)

66 (69.5)

457 (68.2)

II

242 (31.6)

29 (30.5)

213 (31.8)

pT stage

0.804

T1

523 (68.4)

66 (69.5)

457 (68.2)

T2

242 (31.6)

29 (30.5)

213 (31.8)

Tumor size

0.345

Median, mm (range)

18.0 (1.0–30.0)

17.0 (1.0–30.0)

18.0 (1.0–30.0)

ER

0.004

Positive

3 (0.4)

2 (2.1)

1 (0.1)

Negative

762 (99.6)

93 (97.9)

669 (99.9)

PR

0.605

Positive

716 (93.6)

90 (94.7)

626 (93.4)

Negative

38 (5.0)

5 (5.3)

33 (4.9)

Unknown

11 (1.4)

0 (0)

11 (1.6)

HER2

0.373

Positive

31 (4.1)

2 (2.1)

29 (4.3)

Negative

477 (62.4)

59 (62.1)

418 (62.4)

Unknown

257 (33.6)

34 (35.8)

223 (33.3)

Year of diagnosis

0.580

2000–2004

111 (14.5)

15 (15.8)

96 (14.3)

2005–2009

172 (22.5)

23 (24.2)

149 (22.2)

2010–2014

238 (31.1)

28 (29.5)

210 (31.3)

2015–2021

244 (31.9)

29 (30.5)

215 (32.1)

End point status

0.693

Alive

457 (59.7)

397 (59.3)

60 (63.2)

Breast-cancer-related death (BCRD)

58 (7.6)

55 (8.2)

3 (3.2)

Non-BCRD

250 (32.7)

32 (33.7)

218 (32.5)

Race

0.469

White

666 (87.1)

81 (85.2)

585 (87.4)

Black

50 (6.5)

11 (11.6)

39 (5.8)

Other

46 (6.0)

3 (3.2)

43 (6.4)

Unrecorded

3 (0.4)

0 (0)

3 (0.4)

Marital status

0.871

Married

531 (69.4)

72 (75.8)

459 (68.5)

Divorced/separated/widowed

134 (17.5)

14 (14.7)

120 (17.9)

Single/unmarried/domestic partner

70 (9.2)

5 (5.3)

65 (9.7)

Unrecorded

30 (3.9)

4 (4.2)

26 (3.9)