Table 2 Score data of patients in each cluster.

From: Classification and prognostic factors of patients with cervical spondylotic myelopathy after surgical treatment: a cluster analysis

Variables

Results after hierarchical clustering

P valuea

Cluster 1

Cluster 2

Cluster 3

Cluster 4

Subjects (%)

38 (8.0%)

181 (38.0%)

197 (41.4%)

60 (12.6%)

 

Preoperative scores

 SF-36 PF

71.1 ± 23.5

73.1 ± 24.0

65.4 ± 25.7

66.1 ± 28.5

P = 0.008

 SF-36 RP

19.1 ± 36.5

26.0 ± 39.9

19.7 ± 36.4

17.9 ± 35.7

P = 0.175

 SF-36 BP

62.8 ± 28.7

62.8 ± 24.9

60.8 ± 25.0

63.3 ± 25.3

P = 0.628

 SF3-6 VT

57.5 ± 30.3

62.9 ± 26.0

61.2 ± 28.7

61.1 ± 26.8

P = 0.797

 SF-36 SF

64.5 ± 24.9

66.0 ± 23.9

59.8 ± 26.5

62.1 ± 27.4

P = 0.122

 SF-36 RE

23.6 ± 39.4

36.7 ± 44.7

27.5 ± 42.4

23.4 ± 40.3

P = 0.056

 SF-36 MH

66.3 ± 24.8

69.7 ± 20.9

67.6 ± 22.3

68.1 ± 21.3

P = 0.853

 SF-36 HT

4.3 ± 0.7

4.5 ± 4.9

4.4 ± 1.3

4.4 ± 0.7

P = 0.111

 SF-36 GH

57.9 ± 28.3

54.9 ± 25.5

52.3 ± 27.6

48.6 ± 26.7

P = 0.258

 mJOA score

13.6 ± 2.2

13.7 ± 2.8

13.1 ± 2.9

13.0 ± 2.9

P = 0.042

Follow-up scores

 SF-36 PF

76.2 ± 20.6

79.9 ± 17.9

65.9 ± 21.4

76.2 ± 16.7

P < 0.001

 SF-36 RP

6.9 ± 10.1

33.8 ± 40.1

14.1 ± 31.0

22.5 ± 34.4

P < 0.001

 SF-36 BP

54.0 ± 20.6

53.9 ± 20.5

37.3 ± 20.8

46.5 ± 20.4

P < 0.001

 SF3-6 VT

59.5 ± 25.9

58.7 ± 21.3

42.4 ± 21.2

56.2 ± 22.5

P < 0.001

 SF-36 SF

66.8 ± 23.5

65.6 ± 23.0

46.8 ± 21.4

58.3 ± 22.9

P < 0.001

 SF-36 RE

13.6 ± 11.7

54.9 ± 43.6

30.4 ± 41.0

43.2 ± 44.0

P < 0.001

 SF-36 MH

78.8 ± 21.0

75.5 ± 19.5

57.7 ± 20.9

68.6 ± 23.1

P < 0.001

 SF-36 HT

2.6 ± 1.2

3.5 ± 1.2

3.0 ± 1.3

3.3 ± 1.3

P < 0.001

 SF-36 GH

50.7 ± 22.6

55.8 ± 20.0

44.4 ± 20.0

48.4 ± 19.8

P < 0.001

 mJOA score

15.2 ± 1.9

15.7 ± 1.4

14.8 ± 1.8

15.4 ± 1.7

P < 0.001

  1. aUsing the rank sum test (Kruskal–Wallis test) to analyze the difference between groups, and P < 0.05 represented a significant difference.
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