Long-Term Course to Lumbar Disc Resorption Patients and Predictive Factors Associated with Disc Resorption
Table 2
Baseline and follow-up MRI results.
Variables
Baseline MRI
Follow-up MRI
value
%
%
Volume of herniated disc (mm3)
1399.82 ± 594.96
734.37 ± 303.33
0.000
Time interval between baseline and follow-up MRIs (days)
341.38 ± 306.83
Resorption rate (%)
Aggravation
19
3.76
>0–≤25
75
14.85
>25–≤50
191
37.82
>50–≤75
205
40.59
>75–≤100
15
2.97
Komori migration classification
1
310
61.4
488
96.6
0.000
2
106
21.0
16
3.2
3
89
17.6
1
0.2
Disc herniation type
Bulging
1
0.2
87
17.2
0.000
Protrusion
60
11.9
303
60.0
Extrusion
328
65.0
100
19.8
Migration
93
18.4
12
2.4
Sequestration
23
4.6
3
0.6
Disc degeneration grade
I
6
1.2
4
0.8
0.582
II
47
9.3
39
7.7
III
215
42.6
202
40.0
IV
224
44.4
243
48.1
V
13
2.6
17
3.4
Modic change type of vertebral body
0
358
70.9
353
69.9
0.930
1
16
3.2
14
2.8
2
128
25.3
134
26.5
3
3
0.6
4
0.8
Modic change of vertebral body area
Above the herniated disc
22
4.4
20
4.0
0.981
Below the herniated disc
20
4.0
20
4.0
Both above and below the herniated disc
105
20.8
109
21.6
None
358
70.9
356
70.5
Paired -test was used in analysis of change in amount of herniated disc matter from baseline; Chi-square test was used in analysis of change in classification of herniated disc from baseline; MRI, magnetic resonance imaging.
