Table 6 NDI Score.

From: Comparison of the efficacies of TINAVI robot-assisted surgery and conventional open surgery for Levine–Edward type IIA (postreduction) hangman fractures

Indicators

Robot group

Traditional surgery group

t/Z/χ2

P

NDI Score

 Preoperative

32.6 ± 6.3

35.4 ± 8.3

0.101

0.920

 3 Days after surgery

15.2 ± 3.3a

14.4 ± 4.8a

0.720

0.475

 3 Months after surgery

10.1 ± 2.1a

11.1 ± 1.9a

1.924

0.059

 Last follow-up visit

7.2 ± 1.3a

7.1 ± 3.2a

0.167

0.868

  1. NDI neck disability index.
  2. Analysed by paired t test, compared with before the operation, P < 0.05.
  3. Analysis by independent samples t test. Comparison between the two groups, p < 0.05.
  4. arepresents a statistically significant difference preoperatively compared to postoperatively.
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