Table 1 Demographic and outcome data

Pre-revision variables

(n = 46)

(n = 39)

(n = 7)

–

 Age (years; mean ± SD)

61.47 ± 9.34

61.36 ± 9.98

62.19 ± 2.84

0.704

 Female

59%

67%

43%

0.438

 Pain duration (months)

8.59 ± 11.73

8.12 ± 11.57

13.67 ± 14.84

0.587

 Pain 6 months prior (1–10)

6.59 ± 2.66

6.82 ± 2.55

4.75 ± 3.3

0.303

 Pain at revision (1–10)

6.93 ± 2.19

7.15 ± 2.06

5.71 ± 2.63

0.209

 Range of motion (degrees)

94.02 ± 26.58

94.74 ± 27.98

90 ± 17.83

0.569

Post-revision #1 variables (6 weeks)

(n = 39)

(n = 34)

(n = 5)

–

 Duration (weeks)

6.82 ± 2.53

6.95 ± 2.66

5.94 ± 1.08

0.153

 Pain exp

2.97 ± 1.68

2.94 ± 1.7

3.25 ± 1.71

0.748

 Pain

4.46 ± 2.79

4.45 ± 2.69

4.5 ± 3.52

0.972

 Range of motion (degrees)

101.89 ± 22.08

100.95 ± 23.29

107 ± 13.87

0.366

Post-revision #2 variables (5 months)

(n = 31)

(n = 29)

(n = 2)

–

 Duration (weeks)

21.25 ± 17.19

21.68 ± 17.71

15 ± 1.21

–

 Pain exp

3.42 ± 1.61

3.52 ± 1.56

1 ± 0

–

 Pain

4.19 ± 2.35

4.45 ± 2.2

0.5 ± 0.71

–

 Range of motion (degrees)

105.79 ± 20.63

105.35 ± 21.22

112.5 ± 3.54

–

Post-revision #3 variables (1 year)

(n = 20)

(n = 18)

(n = 2)

–

 Duration (weeks)

60.89 ± 24.87

59.53 ± 25.7

73.07 ± 13.84

–

 Pain exp

3.2 ± 1.86

3.36 ± 1.82

1 ± 0

–

 Pain

3.63 ± 2.84

3.91 ± 2.84

1.25 ± 1.77

–

 Range of motion (degrees)

112.09 ± 15.62

112.19 ± 16.01

111 ± 15.56

–