Pooka1
01-01-2012, 09:48 AM
http://journals.lww.com/spinejournal/Abstract/publishahead/The_Association_of_Patient_Characteristics_and.984 99.aspx
The Association of Patient Characteristics and Spinal Curve Parameters with Lenke Classification Types
Sponseller, Paul D. MD; Flynn, John M. MD; Newton, Peter O. MD; Marks, Michelle C. MA, PT; Bastrom, Tracey P. MA; Petcharaporn, Maty BS; McElroy, Mark J. MS; Lonner, Baron S. MD; Betz, Randal R. MD; the Harms Study Group
Published Ahead-of-Print
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Abstract
Study Design. Retrospective review
Objective. To determine the association of patient characteristics and spinal curve parameters with Lenke curve types.
Summary of Background Data. The Lenke curve classification may be used for surgical planning and clinical research.
Methods. We retrospectively reviewed the records of 1912 patients with adolescent idiopathic scoliosis who underwent initial surgery at <=21 years; collected data on patient age, patient gender, primary curve magnitude (<50[degrees], 50[degrees] to 75[degrees], and >75[degrees]), and SRS-22 outcome score; and compared that data by Lenke curve type. ANOVA and chi-square tests were used as appropriate (significance level, P <= 0.005).
Results. Lenke types vary by gender: males had more major thoracic (types 1 - 4) than major thoracolumbar/lumbar (types 5 and 6) curves, fewer lumbar C-modifiers (32% vs. 44%), and less apical lumbar translation (1.1 vs. 1.7 cm). Lenke types vary by frequency: the most common type was 1 (50%); the least common, 4 (4%). Lenke types vary by magnitude: type 4 had the greatest percentage of large curves (52% of curves >75o), most smaller curves were types 1 and 5, and type 4 had the largest mean magnitude (78[degrees] +/- 17[degrees]). Lenke types vary by patient age: type-5 curves occurred in the oldest patients (average age at surgery: 15.4 +/- 2.2 vs. 14.3 +/- 14.6 years for all others), despite having the lowest mean magnitude (P = 0.001); curve size was negatively correlated with age at surgery (r = -0.16, P = 0.001). Lenke types vary by patient self-image: patients with type-4 curves had lower preoperative SRS outcome scores for self-image than did patients with type-1 curves (P = 0.005).
Conclusion. Lenke types vary by gender, frequency magnitude, patient age, and patient self-image, which should be considered in designing studies.
(C) 2011 Lippincott Williams & Wilkins, Inc.
Here are the curve types:
http://www.spinal-deformity-surgeon.com/images/curvatures.gif
1 - T
2 - double T
3 - double major (T > L)
4 - triple major
5 - TL/L
6 - TL/L - T (L > T)
The Association of Patient Characteristics and Spinal Curve Parameters with Lenke Classification Types
Sponseller, Paul D. MD; Flynn, John M. MD; Newton, Peter O. MD; Marks, Michelle C. MA, PT; Bastrom, Tracey P. MA; Petcharaporn, Maty BS; McElroy, Mark J. MS; Lonner, Baron S. MD; Betz, Randal R. MD; the Harms Study Group
Published Ahead-of-Print
Collapse Box
Abstract
Study Design. Retrospective review
Objective. To determine the association of patient characteristics and spinal curve parameters with Lenke curve types.
Summary of Background Data. The Lenke curve classification may be used for surgical planning and clinical research.
Methods. We retrospectively reviewed the records of 1912 patients with adolescent idiopathic scoliosis who underwent initial surgery at <=21 years; collected data on patient age, patient gender, primary curve magnitude (<50[degrees], 50[degrees] to 75[degrees], and >75[degrees]), and SRS-22 outcome score; and compared that data by Lenke curve type. ANOVA and chi-square tests were used as appropriate (significance level, P <= 0.005).
Results. Lenke types vary by gender: males had more major thoracic (types 1 - 4) than major thoracolumbar/lumbar (types 5 and 6) curves, fewer lumbar C-modifiers (32% vs. 44%), and less apical lumbar translation (1.1 vs. 1.7 cm). Lenke types vary by frequency: the most common type was 1 (50%); the least common, 4 (4%). Lenke types vary by magnitude: type 4 had the greatest percentage of large curves (52% of curves >75o), most smaller curves were types 1 and 5, and type 4 had the largest mean magnitude (78[degrees] +/- 17[degrees]). Lenke types vary by patient age: type-5 curves occurred in the oldest patients (average age at surgery: 15.4 +/- 2.2 vs. 14.3 +/- 14.6 years for all others), despite having the lowest mean magnitude (P = 0.001); curve size was negatively correlated with age at surgery (r = -0.16, P = 0.001). Lenke types vary by patient self-image: patients with type-4 curves had lower preoperative SRS outcome scores for self-image than did patients with type-1 curves (P = 0.005).
Conclusion. Lenke types vary by gender, frequency magnitude, patient age, and patient self-image, which should be considered in designing studies.
(C) 2011 Lippincott Williams & Wilkins, Inc.
Here are the curve types:
http://www.spinal-deformity-surgeon.com/images/curvatures.gif
1 - T
2 - double T
3 - double major (T > L)
4 - triple major
5 - TL/L
6 - TL/L - T (L > T)