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Table 2 Differences in demographic and clinical characteristics between shoulder pain categories

From: Regulatory VCAN polymorphism is associated with shoulder pain and disability in breast cancer survivors

Characteristic

Level/unit

No–low

(n = 183)

Moderate–high (n = 71)

p value

Test

Age at consent

Years

60.8 (53.5–65.5)

53.8 (45.3–64.3)

0.001

MU

Time after surgery

Years

3.0 (1.8–4.7)

2.3 (1.7–4.0)

0.139

MU

Nodes removed

 

10.0 (5.5–15.0)

9.0 (5.0–12.0)

0.154

MU

Side of primary

Left

Right

52 (94)

48 (87)

54 (38)

46 (32)

0.779

F

Tumor grade

III

II

I

24 (38)

51 (81)

26 (41)

23 (15)

53 (34)

23 (15)

0.930

χ2

Type of surgery

Mastectomy

WLE

81 (148)

19 (34)

72 (50)

28 (19)

0.165

F

Lymph node surgery

ALND

SLNB

85 (153)

15 (28)

78 (54)

22 (15)

0.263

F

Chemotherapy

Yes

No

74 (131)

26 (46)

84 (58)

16 (11)

0.129

F

Hormonal therapy

Yes

No

77 (134)

23 (39)

79 (54)

21 (14)

0.863

F

Hormonal regimen

Tamoxifen

62 (106)

60 (41)

0.238

χ2

Aromatase inhibitor

8 (14)

4 (3)

Both

7 (12)

15 (10)

Radiotherapy

Yes

No

68 (114)

32 (53)

74 (50)

26 (18)

0.531

F

  1. Notes: Data presented as medians with interquartile ranges in parentheses, or % frequencies with actual counts (n) in parentheses. p values in bold typeset indicate statistical significance (p < 0.05).
  2. Abbreviations: WLE, wide local excision; ALND, axillary lymph node dissection; SLNB, sentinel lymph node biopsy; MU, Mann Whitney U test; F, Fisher’s exact test; χ2, Chi-squared test