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Table 4 Mean sagittal parameters measured on supine low dose CT scans before surgery and at 2 years after surgery for subgroups of patients who had either a (i) 4.5 mm rod (n = 14) or (ii) 5.5 mm rod (n = 16)

From: CT and radiographic analysis of sagittal profile changes following thoracoscopic anterior scoliosis surgery

Sagittal Cobb angle

Difference after Surgery (°)

 

4.5 mm Rod

5.5 mm Rod

T5 - T12

13.5*

11.2*

T2 - T12

9.9*

6.7*

Instrumented Levels

16.4*

12.1*

T2 - T5

−3.6*

−4.5*

T10 - L2

2.2

0.9

Distal to Rod

1.2

0.0

T12 - S1

7.2*

6.6*

  1. * indicates statistically significant difference between pre-operative and 2 year post-operative measures (paired t-test, P < 0.05). No statistically significant differences were found between the 4.5 and 5.5 mm rod groups in terms of pre to post op sagittal changes (unpaired t-test, p < 0.05).
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Scoliosis and Spinal Disorders

ISSN: 2397-1789

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