Ultralong Follow-Up of Spinal Fusion for Adolescent Idiopathic Scoliosis: Harrington Instrumentation vs Uninstrumented Fusion

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Figure 1
(A) Anterior-posterior and (B) lateral scoliosis radiographs of a 73-y-old woman 60 y after uninstrumented fusion for adolescent idiopathic scoliosis. Patient-reported outcomes demonstrated minimal pain/disability. NDI, Neck Disability Index; ODI, Oswestry Disability Index; SRS-7, Scoliosis Research Society-7.
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Figure 2
(A) Anterior-posterior and (B) lateral scoliosis radiographs of a 69-y-old woman 57 y after instrumented fusion for adolescent idiopathic scoliosis. Patient-reported outcomes demonstrated minimal pain/disability. NDI, Neck Disability Index; ODI, Oswestry Disability Index; SRS-7, Scoliosis Research Society-7.

Table 1

Patient characteristics.

Table 2

Patient-reported outcomes and radiographic parameter results examined in this study.

Outcome Measure	Instrumented (n = 7)	Uninstrumented (n = 7)	P Value
Patient-reported outcomes, mean ± SD (range)
Scoliosis Research Society 7-item questionnaire	23.4 ± 2.9 (19–27)	23.6 ± 2.6 (18–27)	0.93
Neck Disability Index	5.7 ± 4.5 (0–10)	10.6 ± 4.5 (2–18)	0.08
Oswestry Disability Index	9.7 ± 13.7 (0–34)	9.4 ± 8.7 (0–22)	0.97
Radiographic parameters, mean ± SD
Pelvic tilt (°)	24.0 ± 7.9	30.5 ± 4.7	0.09
Pelvic incidence (°)	61.3 ± 16.9	67.2 ± 9.5	0.47
Lumbar lordosis (°)	34.9 ± 14.4	42.8 ± 11.0	0.29
Pelvic incidence minus lumbar lordosis (°)	26.4 ± 25.1	24.3 ± 10.4	0.43
Sagittal vertical axis (mm)	38.1 ± 30.1	52.3 ± 21.6	0.37