Table 1 Demographic information of the final cohort

Age

59 (10.64)

55 (11.28)

t value:2.30, p = 0.0228

Level of pathology

Number of repairs

42

49

χ²: 0.57, p = 0.4506

Number of decompressions

36

33

Biceps tenodesis

3

8

Fisher's Exact Test:0.09, p = 0.21

Associated Osteoarthritis

47 (60%)

46 (56%)

χ²: 0.28, p = 0.5940

Work status (Active Compensation)

Yes/no

19/59

15/67

χ²: 0.88, p = 0.35

BMI (Mean, SD)

30 (7)

29 (5)

t value = 0.72, p = 0.47

   • Normal < 25

20 (26%)

11 (13%)

χ²: 8.49, p = 0.014

   • Overweight (25.0-29.99)

24 (31%)

43 (52%)

   • Obese (≥ 30.0)

34 (44%)

28 (34%)

Comorbidity (range: 0-52)

3.48 (2.91)

2.02 (2.44)

t value: 2.17, p = 0.03

Smoking

   • Yes

7 (9%)

15 (18%)

χ²: 2.93, p = 0.09

   • No

71(91%)

67 (82%)

Hand Dominance

   • Right

71 (91%)

74 (90%)

Fisher's Exact Test: 0.11,

   • Left

7 (9%)

7 (9%)

p = 1.00

   • Bilateral

None

1 (1%)

Affected Side

   • Right

45 (57%)

40 (49%)

χ²: 5.19, p = 0.074

   • Left

12 (15%)

25 (30%)

   • Bilateral

21 (27%)

17 (21%)

Side operated on

   • Right

57 (73%)

48 (59%)

   • Left

21 (27%)

34 (41%)

χ²: 3.15, p = 0.05

Symptom duration in months

(Mean, SD)

43.42(84)

46.48 (59)

t value: -0.29, p = 0.77

Symptoms characteristics

   • Pain on movement

60 (77%)

67(79%)

χ²: 0.13, p = 0.85

   • Night pain

54 (69%)

49(60%)

χ²: 1.56, p = 0.21

   • Weakness

52 (67%)

55 (67%)

χ²: 0.03, p = 0.96

   • Catching/Clicking/Grinding

37 (47%)

39 (48%)

χ²: 0.0003, p = 0.99

Mechanism of injury

   • Insidious

24 (31%)

23(28%)

χ²: 0.14, p = 0.71

   • Repetitive activities

14(18%)

13 (16%)

χ²: 0.13, p = 0.72

   • Fall

15 (19%)

10 (12%)

χ²: 1.50, p = 0.22

   • Traumatic

9 (12%)

19 (23%)

χ²: 3.74, p = 0.05