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Table 1 Comparison of variables between the C5P group and No-C5P group

From: Prediction of the risk of C5 palsy after posterior laminectomy and fusion with cervical myelopathy using a support vector machine: an analysis of 184 consecutive patients

 

Total

No C5P

C5P

P

Number of patients

184

158

26

 

Age (years, %)

   

0.51

 < 40

3 (1.6)

2 (1.3)

1 (3.8)

 

 40–50

20 (10.9)

16 (10.1)

4 (15.4)

 

 50–60

45 (24.5)

40 (25.3)

5 (19.2)

 

 60–70

61 (33.2)

54 (34.2)

7 (26.9)

 

 ≥ 70

55 (29.9)

46 (29.1)

9 (34.6)

 

Sex (%)

   

0.402

 Female

86 (46.7)

76 (48.1)

10 (38.5)

 

 Male

98 (53.3)

82 (51.9)

16 (61.5)

 

History of hypertension (%)

   

1

 No

146 (79.3)

125 (79.1)

21 (80.8)

 

 Yes

38 (20.7)

33 (20.9)

5 (19.2)

 

DM (%)

   

0.229

 No

138 (75.0)

121 (76.6)

17 (65.4)

 

 Yes

46 (25.0)

37 (23.4)

9 (34.6)

 

History of smoking (%)

   

0.345

 No

160 (87.0)

139 (88.0)

21 (80.8)

 

 Yes

24 (13.0)

19 (12.0)

5 (19.2)

 

BMI (kg/m2, %)

   

0.003

 ≤ 18.4

3 (1.6)

0 (0.0)

3 (11.5)

 

 18.5–23.9

29 (15.8)

23 (14.6)

6 (23.1)

 

 24.0–27.9

42 (22.8)

37 (23.4)

5 (19.2)

 

 ≥ 28.0

110 (59.8)

98 (62.0)

12 (46.2)

 

Electromyogram abnormal (%)

   

< 0.001

 No

106 (57.6)

100 (63.3)

6 (23.1)

 

 Yes

78 (42.4)

58 (36.7)

20 (76.9)

 

Pathological reflexes (%)

   

0.242

 Strong positive

52 (28.3)

48 (30.4)

4 (15.4)

 

 Positive

89 (48.4)

76 (48.1)

13 (50.0)

 

 Weak positive

34 (18.5)

27 (17.1)

7 (26.9)

 

 Negative

9 (4.9)

7 (4.4)

2 (7.7)

 

Preoperative JOA score

10.7 [8.5, 12.7]

10.4 [8.1, 12.5]

12.9 [11.4, 14.8]

< 0.001

Postoperative JOA score

13.1 [11.7, 14.7]

13.0 [11.7, 14.3]

14.6 [9.1, 17.3]

0.184

JOA recovery rate

75.5 [70.1, 80.6]

77.4 [72.4, 81.3]

61.3 [55.6, 68.6]

< 0.001

Preoperative CCI

6.3 [5.0, 7.6]

6.1 [4.9, 7.4]

7.4 [6.6, 8.3]

0.004

Postoperative CCI

10.5 [8.5, 12.3]

10.4 [8.3, 12.1]

11.3 [9.6, 14.1]

0.062

CCI Change

4.9 [3.8, 6.3]

4.7 [3.8, 6.1]

5.8 [3.7, 7.0]

0.134

Preoperative C2-7 SVA (mm)

23.4 [17.0, 27.4]

22.2 [16.9, 27.0]

23.8 [19.7, 29.0]

0.35

Postoperative C2-7 SVA (mm)

22.9 [19.5, 26.3]

22.9 [19.5, 25.7]

23.7 [19.0, 29.3]

0.422

Modified Pavlov ratio

0.32(0.1)

0.31(0.1)

0.34(0.09)

< 0.001

Presence of foraminal stenosis C4-C5 (%)

   

< 0.001

 No

133 (72.3)

129 (81.6)

4 (15.4)

 

 Yes

51 (27.7)

29 (18.4)

22 (84.6)

 

Number of levels decompressed

3.3 (1.0)

3.2 (0.9)

3.8 (1.2)

0.004

Number of fusion levels

3.9 (0.5)

3.9 (0.5)

4.2 (0.6)

0.014

  1. DM diabetes mellitus, BMI body mass index, JOA Japanese Orthopaedic Association, CCI cervical curvature index, SVA sagittal vertical axis
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X