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Table 5 Clinical outcome of patients with different BME change

From: High-energy extracorporeal shock wave therapy for nontraumatic osteonecrosis of the femoral head

 

Before ESWT

Final follow-up

P value

Harris hip score

BME improved

 Total

77.8 ± 15.6

89.7 ± 11.1

< 0.001

 ARCO stage I

84.6 ± 15.4

95.6 ± 4.5

0.175

 ARCO stage II

80.5 ± 14.3

91.1 ± 11.0

0.006

 ARCO stage III

60.4 ± 8.5

78.0 ± 9.1

0.045

BME unchanged

 Total

77.2 ± 15.1

79.8 ± 17.2

0.354

 ARCO stage I

85.3 ± 8.1

98.3 ± 9.1

0.157

 ARCO stage II

81.4 ± 14.5

81.6 ± 12.8

0.970

 ARCO stage III

59.0 ± 3.5

57.3 ± 1.2

0.560

BME progressed

 Total

67.0

96.0

/

 ARCO stage II

67.0

96.0

/

VAS

BME improved

 Total

3.8 ± 2.8

1.6 ± 1.8

< 0.001

 ARCO stage I

3.1 ± 2.7

0.8 ± 0.8

0.118

 ARCO stage II

3.3 ± 2.8

1.5 ± 1.9

0.005

 ARCO stage III

6.5 ± 1.1

3.3 ± 1.2

0.019

BME unchanged

 Total

3.7 ± 2.2

3.5 ± 3.2

0.734

 ARCO stage I

2.5 ± 1.5

0 ± 0

0.102

 ARCO stage II

3.0 ± 1.9

3.1 ± 2.4

0.873

 ARCO stage III

6.4 ± 0.4

7.6 ± 0.6

0.148

BME progressed

 Total

5.5

1.5

/

 ARCO stage II

5.5

1.5

/