Dissatisfaction Risk Factors of Patients after Laminectomy for Thoracic Ossification of Ligamentum Flavum: A Retrospective Cohort Study of Different Follow-Up Periods
Table 4
The related risk factors of satisfied and dissatisfied patients at discharge.
Characteristics
Satisfaction (n = 30, 52.6%)
Dissatisfaction (n = 27, 47.4%)
P Value
Preoperative duration of symptoms (months)
18.93 ± 10.12
26.37 ± 12.46
0.016
OLF segment
0.133
Upper thoracic (T1–4)
2
6
Middle thoracic (T5–8)
9
10
Lower thoracic (T9–12)
19
11
Number of ossified segments
0.195
1
21
13
2
7
9
>2
2
5
Urination disorder
0.005
Yes
2
10
No
28
17
Intramedullary signal change on MRI
0.009
Yes
19
25
No
11
2
Dural ossification
0.001
Yes
2
12
No
28
15
Residual rate of cross-sectional spinal canal area on CT
0.035
≤60%
18
23
＞60%
12
4
Sato′s classification
0.241
Lateral type
7
3
Extended type
13
7
Enlarged type
5
7
Fused type
2
5
Tuberous type
3
5
Shape on the sagittal MRI
0.031
Beak
27
18
Round
3
9
Operation time (min)
0.217
≤250
16
10
＞250
14
17
Blood loss (ml)
676.67 ± 335.21
825.93 ± 405.34
0.134
Hospital stay (days)
10.47 ± 1.93
13.07 ± 2.49
<0.001
Wound length (cm)
16.6 ± 1.5
17.2 ± 2.1
0.264
Hospitalization expenses (thousand RMB)
49.1 ± 8.4
54.3 ± 10.2
0.041
Pre-mJOA
5.37 ± 1.45
4.74 ± 1.51
0.116
Post-mJOA
6.23 ± 1.48
5.81 ± 1.52
0.297
Preoperative pain in LE VAS
4.27 ± 0.69
4.41 ± 0.84
0.492
Postoperative pain in LE VAS
3.03 ± 1.09
4.14 ± 0.95
<0.001
Mode of operation
0.542
Laminectomy alone
20
20
Laminectomy with instrumentation
10
7
Complications
Wound infected
0.144
Yes
5
9
No
25
18
Delayed wound healing
0.004
Yes
4
13
No
26
14
Leakage of cerebrospinal fluid
0.091
Yes
2
6
No
28
21
Neurological deficit
Nil
Nil
Postoperative depression
0.006
Yes
8
17
No
22
10
Intercostal pain
0.026
Yes
9
16
No
21
11
Thrombosis of lower extremities
0.587
Yes
3
5
No
27
22
Others
0.229
Yes
4
7
No
26
20
mJOA Modified Japanese Orthopaedic Association, VAS Visual Analog Scale, LE : lower extremity, and the difference possessing statistical significance .
