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The usefulness of the sum of rotation parameter in scoliosis screening

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Purpose of the study

It was to assess the usefulness of the Sum of Rotation parameter in scoliosis screening.

Background

The Sum of Rotation parameter (SR) represents the sum of absolute values of angles of trunk rotation (ATRs) measured with a scoliometer on three spinal levels: proximal thoracic, main thoracic and thoracolumbar/lumbar. This parameter is useful in following-up the patient during conservative scoliosis management, because it documents the global rotational trunk deformity [14].

Materials and methods

In a cohort of 996 school girls, aged 11.0 ± 1.0 years, range 9 to13, the average, standard deviation, minimum and maximum values of SR were calculated separately for three distinct subgroups: (a) ATR: 0°- 3°, (b) ATR 4° to 6° and (c) ATR ≥ 7°.

Results

The SR value was: (a) 0.9 ± 1.2, range 0.0° to 6.0°, N=870, (b) 5.5 ± 1.9, range 4.0° to 17°, N= 94, (c) 10.2 ± 3.3, range 7.0° to 20.0°, N= 32. Normal children with important SR values were identified (SR = 2°+2°+2° = 6°).

Conclusions

The use of SR parameter seems not reveal additional information in scoliosis screening comparing to simple ATR measurement. Moreover, a risk of bias is present if the cut-off criterion of 7° is applied.

References

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    Bunnell WP: Outcome of spinal screening. Spine. 1993, 18: 1572-1580. 10.1097/00007632-199309000-00001.

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    Goldberg CJ, Kaliszer M, Moore DP, Fogarty EE, Dowling FE: Surface topography, Cobb angles and cosmetic change in scoliosis. Spine (Phila Pa 1976). 2001, 26: E55-E63. 10.1097/00007632-200102150-00005.

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    Kotwicki T, Kinel E, Chowańska J, Bodnar-Nanuś A: POTSI, Hump Sum and Sum of Rotation - new surface topography parameters for evaluation of scoliosis deformity of the trunk. Fizjoterapia Polska. 2008, 8: 231-240.

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    Suzuki N, Inami K, Ono T, Kohno K, Asher MA: Analysis of posterior trunk symmetry index (POTSI) in Scoliosis. Part 1. Research into Spinal Deformities 2. Stokes, I.A.F. 1999, Amsterdam, IOS Press, 81-84.

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Author information

Correspondence to J Chowańska.

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This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Chowańska, J., Kotwicki, T. The usefulness of the sum of rotation parameter in scoliosis screening. Scoliosis 7, O59 (2012). https://doi.org/10.1186/1748-7161-7-S1-O59

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Keywords

  • Public Health
  • Standard Deviation
  • Normal Child
  • Spinal Level
  • Rotation Parameter