Article Figures & Data
Figures
- Fig 1.
Axial view of DWI. The mean ADC was calculated in the region of interest. The region of interest covered most of the cross-section of spinal cord, excluding the CSF space.
- Fig 2.
Grades of spinal cord compression on MR imaging. Type 0 indicates no compression; type 1, disappearance of CSF space; type 2, mild compressive deformity of spinal cord; and type 3, marked deformity (flattening) of the spinal cord.
- Fig 3.
The relationship between preoperative JOA scores and ADC values in all patients. Patients with ADC values of ≥0.9 × 10−3 mm2/s had lower JOA scores (P = .0085).
- Fig 4.
Recovery rates of JOA scores and preoperative ADC values in 18 patients followed for >6 months. Patients with an ADC of <0.7 × 10−3 mm2/s tended to show better recovery rates than those with an ADC of 0.9 × 10−3 mm2/s (P = .0636).
Tables
Type Preoperative Stage Postoperative Stage (1 wk) Follow-Up Stage (6 mo) 0 0.704 ± 0.142 (n = 140) 0.692 ± 0.134 (n = 114) 0.648 ± 0.143 (n = 84)a I 0.833 ± 0.228 (n = 75)b 0.807 ± 0.171 (n = 63)c 0.676 ± 0.093 (n = 49)d II 0.939 ± 0.330 (n = 74)b 0.880 ± 0.238 (n = 67)e 0.763 ± 0.150 (n = 57)f,g III 0.948 ± 0.289 (n = 33)b 0.908 ± 0.197 (n = 28)h 0.791 ± 0.153 (n = 23) Total 0.813 ± 0.254 (n = 322) 0.723 ± 0.191 (n = 272) 0.691 ± 0.145 (n = 213)i -
Note:—Values are expressed as mean (×10 − 3 mm2/s).
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↵a P = .01 versus type 0 in the preoperative stage.
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↵b P <.0001 versus type 0 in the preoperative stage.
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↵c P = .0008.
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↵d P = .0015 versus type I in the preoperative stage.
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↵e P < .0001.
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↵f P = .004 versus type 0 in the follow-up stage.
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↵g P = .009 versus type II in the preoperative stage.
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↵h P = .005 versus type 0 in the postoperative stage.
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↵i P < .0001 versus total value in the preoperative stage.
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Preoperative Stage Postoperative Stage (1 wk) Follow-Up Stage (6 mo) ISI (+) 1.002 ± 0.305 (n = 48) 0.905 ± 0.255 (n = 41) 0.782 ± 0.147 (n = 32)a ISI (−) 0.775 ± 0.126 (n = 274)b 0.760 ± 0.178 (n = 231)c 0.674 ± 0.141 (n = 181)d Total 0.813 ± 0.254 (n = 322) 0.723 ± 0.191 (n = 272) 0.691 ± 0.145 (n = 213) -
Note:—ISI indicates increased signal intensity. Values are expressed as mean (×10−3 mm2/s).
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↵a P = .02 versus ISI(+) group in the preoperative stage.
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↵b P < .0001 versus ISI(+) group in the preoperative stage.
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↵c P = .001 versus ISI(+) group in the postoperative stage.
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↵d P <.0001 versus ISI(−) group in the preoperative stage.
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- Table 4:
Chronologic changes of mean JOA score and compression group and high T2 signal intensity
Preoperative Postoperative (1 wk) Recovery Rate Follow-Up (6 mo) Recovery Rate Type 0 13.7 ± 2.75 (n = 4) 16.8 ± 0.35 (n = 3) 83.4 ± 23.5 17 (n = 2) 100 Type I 14.1 ± 3.50 (n = 8) 15.9 ± 2.17 (n = 7)a 75.5 ± 28.4 17 (n = 4)b 100 Type II 11.1 ± 3.44 (n = 27) 14.1 ± 2.58 (n = 25)c 57.5 ± 29.8 14.9 ± 2.16 (n = 21)d 72.7 ± 31.4 Type III 9.9 ± 3.47 (n = 27)e 13.2 ± 3.36 (n = 24)f 50.3 ± 28.6 16.1 ± 1.50 (n = 21)g 84.3 ± 19.1 Total 11.0 ± 3.6 (n = 66) 14.0 ± 2.9 (n = 59) 15.7 ± 1.9 (n = 48) ISI(−) 11.9 ± 3.54 (n = 34) 15.2 ± 1.95 (n = 30)h 66.2 ± 27.6 16.4 ± 0.97 (n = 20)i 86.6 ± 21.6 ISI(+) 10.2 ± 3.65 (n = 32) 13.1 ± 3.28 (n = 29)j,k 49.2 ± 29.9l 15.5 ± 1.85 (n = 28)m 77.6 ± 28.2 Total 11.0 ± 3.6 (n = 66) 14.0 ± 2.9 (n = 59) 15.7 ± 1.9 (n = 48) -
Note:—ISI indicates increased signal intensity. Values are expressed as means.
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↵a P = .02.
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↵b P = < .0001 versus type 1 in the preoperative state.
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↵c P = .003.
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↵d P = .02 versus type II in the preoperative stage.
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↵e P = .007.
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↵f P = .0002.
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↵g P = .0001 versus type III in the preoperative stage.
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↵h P = .0001.
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↵i P = .0002 versus ISI(−) group in the preoperative state
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↵j P = .009 versus the ISI(−) group in the postoperative stage.
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↵k P = .004.
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↵l P = .04 versus the ISI(−) group.
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↵m P = .0001 versus ISI(+) in the preoperative stage.
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