Table 5 Comparison of radiographic and clinical outcomes at final follow-up according to intraoperative C2S.

From: Evaluating intraoperative C2 slope as a radiographic guide for cervical deformity correction

Variable

Intraoperative C2S ≤ 0° (n = 27)

Intraoperative C2S > 0° (n = 18)

p-value

Radiographic outcomes at final follow-up

 C2 Slope (°)

9.4 ± 6.7

16.9 ± 5.2

 < 0.001*

 T1 Slope (°)

25.1 ± 6.3

24.4 ± 6.1

0.682

 C2–7 Lordosis (°)

16.4 ± 8.9

8.3 ± 5.5

 < 0.001*

 T1S minus CL (°)

8.8 ± 6.2

16.1 ± 5.5

 < 0.001*

 C2–7 SVA (mm)

22.0 ± 12.1

23.7 ± 12.3

0.637

Clinical outcomes at final follow-up

 Neck pain VAS

0.5 ± 1.1

2.1 ± 2.0

0.001*

 Arm pain VAS

0.4 ± 1.1

0.9 ± 1.6

0.166

 NDI (%)

17.5 ± 11.0

27.8- + 18.2

0.050

 NDI MCID achieved

16 (59.3%)

11 (61.1%)

0.901

 JOA score

16.3 ± 1.0

15.2 ± 2.5

0.095

 JOA recovery rate (%)

85.5 ± 23.9

65.8 ± 38.9

0.068

 JOA recovery rate MCID achieved

25 (92.6%)

12 (66.7%)

0.045*

 EQ-5D VAS

82.8 ± 16.9

77.1 ± 12.3

0.234

  1. Data are expressed as mean ± standard deviation or number (%).
  2. C2S, C2 slope; T1S, T1 slope; CL, C2-7 Lordosis; SVA, Sagittal Vertical Axis; VAS, Visual Analogue Scale; NDI, Neck Disability Index; MCID, Minimal Clinically Important Difference; JOA, Japanese Orthopedic Association score; EQ-5D, EuroQol-5 Dimension.
  3. *Indicates significance.