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Table 2 Comparison of demographic and clinical data between the two groups

From: Hounsfield unit value on CT as a predictor of cage subsidence following stand-alone oblique lumbar interbody fusion for the treatment of degenerative lumbar diseases

 

Subsidence group

(n = 16)

Nonsubsidence group 

(n = 60)

P value

Mean age (years)

64.4 ± 7.1

54.0 ± 10.1

< 0.001

Sex (M/F) (% male)

6/10 (37.5)

24/36 (40.0) 

0.856

BMI (kg/m2)

24.6 ± 1.8

24.7 ± 2.3

0.892

Lowest T-score

− 2.8 ± 0.8

− 1.6 ± 1.3 

< 0.001

HU value

 

 L1 vertebrae

98.5 ± 18.8

140.8 ± 28.6

< 0.001

 L1-L4 horizontal plane

95.4 ± 17.6

136.8 ± 28.3 

< 0.001

 L1-L4 sagittal plane

90.7 ± 22.4

135.2 ± 31.3

< 0.001

 Operated segment

96.3 ± 19.2

134.4 ± 29.7

< 0.001

 Upper vertebrae of operated segment

94.7 ± 20.4

133.2 ± 28.8 

< 0.001

 Lower vertebrae of operated segment

97.8 ± 20.5

135.6 ± 32.4 

< 0.001

Diagnoses [no.(%) of patients]

 

 Degenerative spondylolisthesis

8 (50)

24 (40)

0.472

 Lumbar instability

5 (31.3)

12 (20)

0.534

 Adjacent segmental disease

3 (18.8)

15 (25)

0.848

 Adult degenerative scoliosis

0 (0)

6 (10.0) 

0.426

 Discogenic back pain

0 (0)

3 (5.0)

1.000

Fused level [no.(%)of patients]

 

 One level

16 (100)

54 (90)

0.426

 Two level

0 (0)

4 (6.7)

0.573

 Three level

0 (0)

2 (3.3)

1.000

  1. Abbreviations: BMI Body Mass Index