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Original Articles

A CaRBS analysis of hip replacement approaches and non-pathology

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Pages 175-184 | Received 19 Dec 2010, Accepted 08 Aug 2011, Published online: 31 Jan 2012

Figures & data

Figure 1 Waveforms for (a) hip extension/flexion; (b) pelvic obliquity; (c) frontal plane power at the hip and (d) frontal plane moment at the hip. Principal components C1,…,C4, are highlighted by the grey regions on each waveform (the NP (std) is NP +1 and − 1 std, and NP (2std) is NP +2 and − 2 std).

Figure 1 Waveforms for (a) hip extension/flexion; (b) pelvic obliquity; (c) frontal plane power at the hip and (d) frontal plane moment at the hip. Principal components C1,…,C4, are highlighted by the grey regions on each waveform (the NP (std) is NP +1 and − 1 std, and NP (2std) is NP +2 and − 2 std).

Table 1. Descriptions of PCs reflecting the subject-based characteristics C1, C2, C3 and C4.

Figure 2 Simplex plot-based representation of final subject BOEs, post configuration of CaRBS model, for (a) LA, PA and (b) NP surgical types.

Figure 2 Simplex plot-based representation of final subject BOEs, post configuration of CaRBS model, for (a) LA, PA and (b) NP surgical types.

Figure 3 Description of levels of contribution of subject-based characteristics based on average characteristic BOEs.

Figure 3 Description of levels of contribution of subject-based characteristics based on average characteristic BOEs.

Figure 4 Contribution graphs for characteristic values in terms of their characteristic BOEs, for C1, C2, C3 and C4 (post configuration of CaRBS model, for LA, PA surgical types and NP).

Figure 4 Contribution graphs for characteristic values in terms of their characteristic BOEs, for C1, C2, C3 and C4 (post configuration of CaRBS model, for LA, PA surgical types and NP).

Table 2. Subject-based characteristic contribution results from LR analysis (coefficients a1,…,a4 associated with subject-based characteristics C1,…,C4, respectively – making up the logistic expression Logit(DV) = a0+a1 × C1+a2 × C2+a3 × C3+a4 × C4).

Figure A1 Graphical representation of an intermediate stage in CaRBS, for a characteristic value v to be transformed into a characteristic BOE and subsequent representation as a simplex coordinate in a simplex plot. Adapted from Beynon 2005a, p. 498, copyright (2004), with permission from Elsevier.

Figure A1 Graphical representation of an intermediate stage in CaRBS, for a characteristic value v to be transformed into a characteristic BOE and subsequent representation as a simplex coordinate in a simplex plot. Adapted from Beynon 2005a, p. 498, copyright (2004), with permission from Elsevier.