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Table 6 Patient demographics and clinical characteristics

From: Reducing surgical levels by paraspinal mapping and diffusion tensor imaging techniques in lumbar spinal stenosis

Demographics and surgical characteristics

Experiment group

(n = 55)

Control group

(n = 59)

p-value

Age

61.78 ± 10.05

64.47 ± 9.18

0.138

Sex, n (%)

  

0.334

Male

23(42 %)

30(51 %)

 

Female

32(58 %)

29(49 %)

 

BMI (kg/m 2),

35.70 ± 3.47

36.63 ± 4.63

0.226

Comorbidities, n (%)

   

Hypertension, n (%)

21(38 %)

26(44 %)

0.524

Coronary artery disease, n(%)

6(11 %)

7(12 %)

0.873

Ulcer, n(%)

2(4 %)

1(2 %)

0.609b

Diabetes mellitus, n (%)

2(4 %)

4(7 %)

0.680b

Cholecystitis, n (%)

2(4 %)

2(3 %)

1.000b

Arrhythmias, n (%)

3(5 %)

1(2 %)

0.351b

Presence of spondylolisthesis, n (%)

   

Yes

28(51 %)

27(46 %)

0.583

No

   

Scoliosis, n (%)

  

0.443

Yes

26(47 %)

31(53 %)

0.574

No

   

Preoperative back pain (VAS-BP)

99.72 ± 21.76

104.92 ± 18.26

0.170

Preoperative leg pain (VAS-LP)

105.58 ± 18.55

108.86 ± 13.54

0.280

Preoperative ODI

43.78 ± 7.30

43.68 ± 5.84

0.934a

Levels determined by MRI + NE

2.76 ± 0.79

2.64 ± 0.87

0.445

  1. aBecause equal variances were not assumed, Satterthwaite separate variance estimation t-test was selected; bFisher’s exact test was selected because of the minimum theoretical expected frequency < 5; BMI body mass index, BP back pain; LP leg pain, ODI oswestry disability index, VAS visual analog scale, MRI magnetic resonance imaging, NE neurogenic examination