Role of shoulder gradient in the pathogenesis of rotator cuff tears

Table 1 Clinical and demographic characteristics of the patients with rotator cuff problems

Variable	mean ± SD /n (%) (n = 61)
Age (yr)	55.7 ± 12.3
Gender
Female	31 (50.8)
Male	30 (49.2)
BMI (kg/m2)	27.3 ± 4.9
Dominancy
Dominant	39 (64)
Non-dominant	22 (36)
Etiology
Trauma	33 (54.1)
Rheumatologic disorders	18 (25.5)
Unspecified	10 (16.4)
Type of RCT
Supraspinatus	27 (43.5)
Supraspinatus and infraspinatus	21 (34.5)
Subscapularis	5 (8.5)
Supraspinatus and subscapularis	8 (13.5)
Symptom duration (mo)	4.57 ± 1.88
VAS pain	4.1 ± 1.2

BMI: Body mass index; VAS pain: Visual analogue scale for pain; RCT: Rotator cuff tear.

Table 2 The statistical association of shoulder gradient with the clinical and demographic characteristics of the patients with rotator cuff problems

Variable	Shoulder gradient difference (n = 61)	P value
Age (yr)		0.089
< 60	-1.48 ± 1.08
> 60	-1.03 ±0.96
Gender		0.12
Female	-1.1 ± 0.77
Male	-1.21 ± 0.97
BMI (kg/m2)		0.11
< 26	-1.53 ± 0.89
> 26	-1.27± 1.07
Dominancy		0.092
Dominant	-1.25 ± 1.09
Non-dominant	-1.27 ± 1.11
Etiology		0.068
Trauma	-1.47 ± 1.21
Rheumatologic disorders	-1.12 ± 1.28
Unspecified	-1.52 ± 1.03
Type of RCT		0.51
Supraspinatus	-1.13 ± 1.4
Supraspinatus and infraspinatus	-1.28 ± 1.33
Subscapularis	-1.09 ± 1.1
Supraspinatus and subscapularis	-1.22 ± 1.39
Symptom duration (mo)		0.77
< 3	-1.61 ± 1.12
> 3	-1.16 ± 1.09
VAS pain		0.14
< 3	-1.52 ± 1.02
> 3	-1.24 ± 0.95

BMI: Body mass index; VAS pain: Visual analogue scale for pain.