Intra-rater and inter-rater reliability of gait measurements with CODA mpx30 motion analysis system

Maynard, Veronica; Bakheit, A. M. O.; Oldham, Jacqueline; Freeman, Joseph T.

doi:10.1016/s0966-6362(02)00051-6

Cited by 76 publications

(75 citation statements)

References 9 publications

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“…The repeatability of the gait variables included in this study has previously been determined in young growing pigs (Stavrakakis et al, 2013a). The range of mean differences between marker placements was comparable to achievement in horses (Weller et al, 2006) and humans (Maynard and Bakheit, 2003), including both stance and swing phases of the gait cycle. Although skin movement has been found to be increased during the swing phase (van Weeren et al, 1992), the joint angles during this phase undergo substantial changes, as confirmed in the current study where pigs showed a greater range of motion.…”

Section: Discussionmentioning

confidence: 87%

“…However, compared to previously conducted studies with similar objectives using subjective assessment, a compromise of the present detailed study is the smaller number of subjects. In marker-based kinematic studies, there are some sources of error within the methodology, such as skin movement artefact and failure in anatomical landmark identification (van Weeren et al, 1992;Maynard and Bakheit, 2003). The repeatability of the gait variables included in this study has previously been determined in young growing pigs (Stavrakakis et al, 2013a).…”

Section: Discussionmentioning

confidence: 99%

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Longitudinal gait development and variability of growing pigs reared on three different floor types

Stavrakakis

Guy

Warlow

et al. 2014

Animal

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Biomechanical investigation into locomotor pathology in commercial pigs is lacking despite this being a major concern for the industry. Different floor types are used in modern, intensive pig production systems at different stages of the pigs' production cycle. The general perception holds that slatted and/or hard solid concrete surfaces are inferior to soft straw-covered floors regarding healthy musculoskeletal development. Previous studies have compared pigs housed on different floor types using clinical, subjective assessment of leg weakness and lameness. However, reliability studies generally report a low repeatability of clinical lameness scoring. The objective of this study was to quantitatively assess the long-term effect of pen floors, reflected in the biomechanical gait characteristics and associated welfare of the pigs. A cohort of 24 pigs housed on one of three different floor types was followed from 37 to 90 kg average liveweight, with gait analysis (motion capture) starting at 63 kg. The three floor types were fully slatted concrete, partly slatted concrete and deep straw-bedded surfaces, all located within the same building. Pigs underwent five repeated camera-based motion captures, 7 to 10 days apart, during which 3D coordinate data of reflective skin markers attached to leg anatomical landmarks were collected. Pigs walked on the same solid concrete walkway during captures. One-way ANOVA and repeated measures ANOVA were used to analyse the gait data. Results revealed changes over time in the spatiotemporal gait pattern which were similar in magnitude and direction for the pigs from different floor types. Significant increases in elbow joint flexion with age were observed in all pigs (P ⩽ 0.050; +6°). There were few differences between floor groups, except for the step-to-stride ratio in the hind legs being more irregular in pigs housed on partly slatted floors (P = 0.012; 3.6 times higher s.d.) compared with those on 5 to 10 cm straw-bedding in all pen areas. As the level of clinical problems was generally low in this cohort, it may be that floors elicit problems only when there is a primary predisposing factor increasing weakness in susceptible tissues.

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Section: Discussionmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Longitudinal gait development and variability of growing pigs reared on three different floor types

Stavrakakis

Guy

Warlow

et al. 2014

Animal

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“…9 11 17 Although mid-stance is not a discrete point in time, it was defined as occurring at 50% of stance. 14 Results are presented using the following abbreviations for each condition; shoes with no instruction (SI À ), shoes with instruction (SI + ), VFF with no instruction (VI À ) and VFF with instruction (VI + ). SI À was assigned as the experimental control.…”

Section: Discussionmentioning

confidence: 99%

The effect of minimalist footwear and instruction on running: an observational study

Barcellona¹,

Buckley²,

Palmer

et al. 2017

Physiotherapy

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“…great levels of ICC for the following variables: cadence (0.94), length of the plegic stride (0.95), gait cycle length (0.94), and simple stance phase (0.89). Maynard et al 31 suggest that a minimum of three gait cycles may be used as a mean when one wants to evaluate the repeatability. Nevertheless, Steinwender et al 24 compared the repeatability of gait in normal children, as well as in children with CP using the mean of ten attempts, and both groups showed high variability.…”

Section: Discussionmentioning

confidence: 99%

Repetibilidade dos parâmetros espaço-temporais da marcha: comparação entre crianças normais e com paralisia cerebral do tipo hemiplegia espástica

Pd¹,

Ac²

2009

Rev. bras. fisioter.

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© Revista Brasileira de FisioterapiaRepeatability of spatiotemporal gait parameters: comparison between normal children and children with hemiplegic spastic cerebral palsyRepetibilidade dos parâmetros espaço-temporais da marcha: comparação entre crianças normais e com paralisia cerebral do tipo hemiplegia espástica AbstractObjective: To evaluate the repeatability of spatiotemporal gait parameters by means of a comparative study between normal children and children with cerebral palsy (CP). Methods: The sample consisted of 17 children divided into two groups: a group of nine children with spastic hemiplegia CP and a group of eight normal children. The children were evaluated by the same researcher in two different sessions, with a one-week interval between the sessions. The children walked at self-selected velocities, and six attempts were performed at each session to represent the average. To record the spatiotemporal parameters, the Peak Motus system was used with two SVHS video cameras with an acquisition rate of 60 Hz. The intra-class correlation coefficient (ICC) and Bland-Altman concordance limits were chosen for data analysis. Results: The results demonstrated that the children with CP presented lower velocity and shorter cycles than the normal children in sessions 1 and 2. For all the spatiotemporal parameters, the two groups presented moderate to excellent ICC values, i.e. greater than 0.70. Conclusion: It can be concluded that the two groups presented good levels of repeatability for all the parameters analyzed when six attempts were used to represent the average.Key words: gait; children; cerebral palsy; repeatability. ResumoObjetivo: Avaliar a repetibilidade das medidas dos parâmetros espaço-temporais da marcha por meio de um estudo comparativo entre crianças normais e crianças com paralisia cerebral (PC). Métodos: A amostra foi composta por 17 crianças divididas em dois grupos: um grupo de nove crianças com PC do tipo hemiplegia espástica e um grupo com oito crianças normais que foram avaliadas pelo mesmo pesquisador em duas sessões diferentes, com intervalo de uma semana entre as sessões. As crianças caminharam em velocidade autosselecionada e foram utilizadas seis tentativas nas sessões 1 e 2 para representar a média. Para registro dos parâmetros espaço-temporais, foi utilizado o sistema Peak Motus, com duas câmeras de vídeo SVHS com taxa de aquisição de 60 Hz.Coeficiente de correlação intraclasse (ICC) e limites de concordância de Bland-Altman foram escolhidos para análise dos dados.Resultados: Os resultados demonstraram que as crianças com PC apresentaram menor velocidade e comprimento do ciclo do que as crianças normais para as sessões 1 e 2. Para todos os parâmetros espaço-temporais, os dois grupos apresentaram valores de ICC de excelentes a moderados, ou seja, maior do que 0,70. Conclusão: Pode-se concluir que os dois grupos apresentaram níveis bons de repetibilidade para todos os parâmetros analisados quando seis tentativas foram utilizadas para representar a média.

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Intra-rater and inter-rater reliability of gait measurements with CODA mpx30 motion analysis system

Cited by 76 publications

References 9 publications

Longitudinal gait development and variability of growing pigs reared on three different floor types

Longitudinal gait development and variability of growing pigs reared on three different floor types

The effect of minimalist footwear and instruction on running: an observational study

Repetibilidade dos parâmetros espaço-temporais da marcha: comparação entre crianças normais e com paralisia cerebral do tipo hemiplegia espástica

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