Table 4 Comparison of the clinical indicators with or without 3D-Slicer (mean ± SD).

From: Application of 3D Slicer for preoperative planning in upper cervical posterior fixation with vertebral artery variations

Indicator

Without 3D-Slicer

With 3D-Slicer

t-value

P-value

VAS improvement rate (%)

1.91 ± 0.85 (95% CI 1.71–2.11)

1.91 ± 0.76 (95% CI 1.70–2.12)

0.021

0.983

mJOA improvement rate (%)

0.24 ± 0.07 (95% CI 0.22–0.26)

0.23 ± 0.07 (95% CI 0.21–0.25)

0.923

0.358

Operation time (min)

135 ± 30 (95% CI 128–142)

96 ± 32 (95% CI 87–105)

6.701

 < 0.0001

Intraoperative blood loss (ml)

249 ± 87 (95% CI 228–270)

88 ± 49 (95% CI 75–101)

11.79

 < 0.0001

Vertebral artery injuries (%)

0/51 (95% CI 0.00–7.02)

4/67 (95% CI 1.86–14.6)

/

0.122

  1. VAS visual analogue scale, VAS improvement rate = (postoperative VAS score−Preoperative VAS score)/(10 − preoperative VAS score) × 100%; mJOA modified Japanese orthopedic association; mJOA improvement rate = (postoperative mJOA score − preoperative mJOA score)/(18 − preoperative mJOA score) × 100%
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