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Inter-operator reliability and prediction bands of a novel protocol to measure the coordinated movements of shoulder-girdle and humerus in clinical settings

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Abstract

A clinical motion analysis protocol was developed to measure the coordinated movements of shoulder-girdle and humerus (girdle-humeral rhythm—GD-H-R) during humerus flexion–extension (HFE) and ab-adduction (HAA), through an optoelectronic system. In particular, the protocol describes the GD-H-R with 2 angle–angle plots for each movement: girdle elevation–depression and protraction–retraction vs HFE, and vs HAA. Each of these plots is further divided in two subplots, one for the upward and one for the downward phases of the movement. By involving 11 participants and 2 operators, we measured the protocol’s inter-operator reliability which ranged from very-good to excellent depending on the angle–angle plot (median values of the inter-operator coefficient of multiple correlation for the angle–angle plots higher than 0.94). We then computed the subjects’ average control patterns, together with statistically meaningful prediction bands. ±1SD confidence bands were also computed and their width ranged from ±0.5° to ±4.6°. Based on these results we could conclude that the method is robust and able to identify even limited differences in the GD-H-R.

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Authors and Affiliations

  1. I.N.A.I.L. Prostheses Center, Via Rabuina, 14, 40054, Vigorso di Budrio, Bologna, Italy

    Pietro Garofalo, Andrea Giovanni Cutti, Maria Vittoria Filippi, Alberto Ferrari & Angelo Davalli

  2. Department of Electronics, Computer Science and Systems, University of Bologna, Bologna, Italy

    Pietro Garofalo, Alberto Ferrari & Angelo Cappello

  3. Ospedale San Giorgio, Ferrara, Italy

    Stefano Cavazza

Authors
  1. Pietro Garofalo
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  2. Andrea Giovanni Cutti
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  3. Maria Vittoria Filippi
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  4. Stefano Cavazza
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  5. Alberto Ferrari
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  6. Angelo Cappello
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  7. Angelo Davalli
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Corresponding author

Correspondence to Andrea Giovanni Cutti.

Electronic supplementary material

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11517_2009_454_MOESM1_ESM.jpg

Example of data collection for the two-way repeated measures ANOVA performed to compute the prediction bands. a) ED angles at 100 degrees of FE during 4 repetitions (trials) of HFE, for each subject; b) data table for ANOVA analysis. Operator and Repetition are the two factors with 2 and 4 levels, respectively (JPEG 188 kb)

Supplementary material 1 (DOC 1717 kb)

Supplementary material 2 (XLS 84 kb)

Supplementary material 3 (AVI 1558 kb)

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Garofalo, P., Cutti, A.G., Filippi, M.V. et al. Inter-operator reliability and prediction bands of a novel protocol to measure the coordinated movements of shoulder-girdle and humerus in clinical settings. Med Biol Eng Comput 47, 475–486 (2009). https://doi.org/10.1007/s11517-009-0454-z

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  • DOI: https://doi.org/10.1007/s11517-009-0454-z

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