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Table 1 Development of radiological measurements

From: Is the radiographic subsidence of stand-alone cages associated with adverse clinical outcomes after cervical spine fusion? An observational cohort study with 2-year follow-up outcome scoring

 

Preoperative

Postoperative

FU1

FU2

After mean 2.2 days (1–8 days)

After mean 8 months (6–13 months)

After mean 26 months (23–37 months)

α (kyphosis angle)

176 (163–183)

172.5 (160–181)

176.9 (157–190)

176.4 (156–196)

a (ventral intervertebral space) in mm

3.6 (1.7–8.5)

7.5 (4.5–10.1)

6.2 (2.4–9)

5.6 (1.2–8.8)

b (dorsal intervertebral space) in mm

3.1 (1.2–8.5)

6.1 (3.9–7.7)

5.4 (3.3–7.4)

4.9 (0.7–7.6)

Subsided segments

  

36.3% (12 out of 33)

50.5% (18 out of 33)

Patients with subsidence

  

64.7% (11 out of 17)

70.6% (12 out of 17)

  1. (α: kyphosis angle between two adjacent segments, a: ventral intervertebral space between two adjacent segments, b: dorsal intervertebral space between two adjacent segments) and subsidence by segment and patients at the individual survey times (preoperatively, postoperatively after 2.2 days (mean; 1–8 days), mean time of follow-up 1 after 8 months (mean; 6–13 months) and mean time of follow-up 2 after 26 months (mean; 23–37 months).
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Patient Safety in Surgery

ISSN: 1754-9493