Showing papers on "Cobb angle published in 1983"

Curve progression in idiopathic scoliosis.

Abstract: One hundred and thirty-three curves in 102 patients who were followed for an average of 40.5 years were evaluated to quantitate curve progression after skeletal maturity and for prognostic factors leading to curve progression. Sixty-eight per cent of the curves progressed after skeletal maturity. In general, curves that were less than 30 degrees at skeletal maturity tended not to progress regardless of curve pattern. In thoracic curves the Cobb angle, apical vertebral rotation, and the Mehta angle were important prognostic factors. In lumbar curves the degree of apical vertebral rotation, the Cobb angle, the direction of the curve, and the relationship of the fifth lumbar vertebra to the intercrest line were of prognostic value. Translatory shifts played an important role in curve progression. Curves that measured between 50 and 75 degrees at skeletal maturity, particularly thoracic curves, progressed the most.

Error analysis of scoliosis curvature measurement.

Abstract: The Cobb angle is the recommended standard for curvature assessment of scoliotic patients. Because the errors associated with this measure are thought to be significant, we conducted a study to quantify the variability of the Cobb measure among observers, within each observer's repeated measurements, and between the traditional protractor Cobb measurement and a computer-aided technique.

Statistical assessment of two methods of measuring scoliosis before treatment

Abstract: Regression analysis has shown that the Ferguson and Cobb methods of measuring spinal curvature give comparable results, at least before the scoliosis is treated. When the Cobb angle was calculated by multiplying the Ferguson angle by 1.38, the results were accurate to within 5 degrees in 28 (76%) of 37 cases. Any further debate over the merits of the two methods should focus on their inter- and intraobserver reproducibility and their applicability after corrective treatment.

Relationship between rib hump deformity and vertebral rotation in idiopathic scoliosis.

Abstract: The authors advance the theory that there are two distinct groups of idiopathic scoliosis, of different aetiology and with different potential for development. This is based on the relationship between vertebral rotation and wedge deformity of the vertebral bodies. The rotatory type can be identified, to a statistically significant extent, in the initial phases of thoracic scoliosis. In order to test this hypothesis, we therefore confined our study to cases in which the initial Cobb angle was less than 20 degrees.

Applying for jobs.

Abstract: 22 Ardran GM, Coates R, Dickson RA, Dixon-Brown A, Harding FM. Assessment of scoliosis in children. Low-dose radiographie technique. Br J Radiol 1980;53:146-7. 23 Whittle MW, Evans M. Instrument for measuring the Cobb angle in scoliosis. Lancet 1979;i:414. 24 Cobb JR. Outline for the study of scoliosis. In: Edwards JW, ed. Instructional course lecture. Vol 5. Ann Arbor, Michigan: American Academy of Orthopaedic Surgeons, 1948:261. 25 Commission on Chronic Illness. Chronic illness in the United States. Vol I. Cambridge, Massachusetts: Harvard University Press, 1957. 26 Whitby LG. Screening for disease. Definitions and criteria. Lancet 1974; ii:819-22. 27 Sabatier. Traite complete d'anatomic Paris: 1777. Quoted by A Farkas.28 28 Farkas A. Physiological scoliosis. J Bone Joint Surg 1941;23:607-27. 29 De Smet AA, Fritz SL, Asher MA. A method for minimising the radiation exposure from scoliosis radiographs. J Bone Joint Surg 1981 ;63A: 156-8. 30 Dickson RA, Lawton JO, Archer IA, et al. Combined median and coronal plane asymmetry?the essential lesion of progressive idiopathic scoliosis. J Bone Joint Surg (in press). 31 Nachemson A. A long-term follow-up study of non-treated scoliosis. Acta Orthop Scand 1968;39:466-76. 32 Belstead JS, Edgar MA. Early detection of scoliosis. Br MedJ 1978;ii: 937-8.