Comparison of Clinical and Radiologic Outcome of Adolescent Idiopathic Scoliosis Treated with Hybrid Hook-Screw Instrumentation versus Universal Clamp System

Table 2

Sagittal preoperative, immediate, and final postoperative Cobb angle measurements in both groups.

Mean sagittal Cobb angle	Curve	Group A	Group B	Significance
Preoperative	Thoracic	35.2° (3–56)	36.6° (0–68)	NS
	Thoracolumbar	13.8° (−8–22)	14.3° (−11–24)	NS
	Lumbar	−43.6° (−75 to −21)	−42.5° (−68 to −18)	NS
Immediate postoperative	Thoracic	26.6° (15–50)	30.8° (10–58)	NS
	Thoracolumbar	2.9° (−11–3)	2.1° (−13 to 15)	NS
	Lumbar	−42° (−70 to −10)	−40.6° (−61 to −20)	NS
Final postoperative	Thoracic	28.7° (11–55)	27.3° (12–54)	NS
	Thoracolumbar	5.2° (−14–5)	4.8° (−10–15)	NS
	Lumbar	−42° (−73 to −15)	−41.3° (−65 to −18)	NS