Table 1 Comparison between injection/non-injection groups by univariate analysis

Age (years)

64.4

62.1

0.22

 Male

32 (55%)

28 (70%)

 Female

26 (44%)

12 (30%)

0.13

NSAID (n)

37 (63%)

24 (60%)

0.70

Hard work (n)

21 (38%)

13 (35%)

0.71

Diabetes mellitus (n)

2 (3%)

5 (12%)

0.08^a

Contracture (n)

15 (25%)

7 (17%)

0.32

Trauma (n)

27 (56%)

13 (37%)

0.08^a

Workmen’s accidents (n)

8 (15%)

5 (14%)

0.88

Worker’s compensation (n)

8 (15%)

5 (14%)

0.88

Follow-up period (months)

8.4

8.9

0.81

VAS (rest)

2.1

2.1

0.97

VAS (motion)

5.6

4.7

0.14

VAS (night)

4.5

3.6

0.17

 Elevation (°)

107

112

0.52

 Abduction (°)

99

106

0.44

 Internal rotation (level of intervertebral body)

5.2

5.5

0.62

 External rotation (°)

48

45

0.51

 Elevation (relative ratio to uninvolved side)

70

75

0.28

 Abduction

72

74

0.77

 Internal rotation

72

85

0.58

 External rotation

90

87

0.17

 UCLA score

14

16

0.04^a

 PO 3 M VAS (rest)

0.6

0.7

0.86

 PO 3 M VAS (motion)

1.4

2.2

0.04^a

 PO 3 M VAS (night)

0.8

1.4

0.06^a

 PO 4 M VAS (rest)

0.4

0.7

0.19

 PO 4 M VAS (motion)

2.1

2.1

0.88

 PO 4 M VAS (night)

1.0

1.5

0.18

 PO 6 M VAS (rest)

0.3

0.6

0.11

 PO 6 M VAS (motion)

1.5

1.9

0.24

 PO 6 M VAS (night)

0.7

0.9

0.55

 PO 12 M VAS (rest)

0.3

0.4

0.61

 PO 12 M VAS (motion)

1.1

1.0

0.59

 PO 12 M VAS (night)

0.4

0.3

0.62

 PO 3 M elevation (°)

97

89

0.32

 PO 3 M abduction (°)

83

79

0.68

 PO 3 M internal rotation (level of intervertebral body)

2.9

3.1

0.71

 PO 3 M external rotation (°)

20

17

0.48

 PO 4 M elevation (°)

114

119

0.44

 PO 4 M abduction (°)

104

112

0.38

 PO 4 M internal rotation (level of intervertebral body)

4.8

4.3

0.44

 PO 4 M external rotation (°)

28

28

0.93

 PO 6 M elevation (°)

134

126

0.24

 PO 6 M abduction (°)

133

127

0.39

 PO 6 M internal rotation (level of intervertebral body)

6.6

5.5

0.08^a

 PO 6 M external rotation (°)

36

34

0.57

 PO 12 M elevation (°)

140

141

0.79

 PO 12 M abduction (°)

142

143

0.88

 PO 12 M internal rotation (level of intervertebral body)

8.1

7.9

0.80

 PO 12 M external rotation (°)

38

38

0.87

 PO 3 M elevation (relative ratio to uninvolved side)

33

31

0.68

 PO 3 M abduction

34

31

0.47

 PO 3 M internal rotation

71

67

0.53

 PO 3 M external rotation

58

57

0.95

 PO 4 M elevation (relative ratio to uninvolved side)

55

48

0.25

 PO 4 M abduction

61

49

0.06^a

 PO 4 M internal rotation

82

80

0.70

 PO 4 M external rotation

77

74

0.82

 PO 6 M elevation (relative ratio to uninvolved side)

70

59

0.10

 PO 6 M abduction

71

64

0.39

 PO 6 M internal rotation

90

93

0.58

 PO 6 M external rotation

81

76

0.57

 PO 12 M elevation (relative ratio to uninvolved side)

82

78

0.60

 PO 12 M abduction

78

77

0.85

 PO 12 M internal rotation

100

90

0.06^a

 PO 12 M external rotation

83

87

0.65

 PO 3 M UCLA score

16

13

0.03^a

 PO 4 M UCLA score

20

18

0.41

 PO 6 M UCLA score

24

23

0.74

 PO 12 M UCLA score

28

28

0.93