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Cui Zhang, Qipeng Song, Wei Sun and Yu Liu

dynamic stability (MoS) ( Bosse et al., 2012 ). Our study contributes to the literature by providing high clinical relevance in relation to safety during stair negotiation in older adults under cognitive and physically challenging environments. To address this knowledge gap, this study aims to compare the

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Kevin Terry, Christopher Stanley and Diane Damiano

There remains a pressing need for a stability metric that can reliably identify fall susceptibility during walking, enabling more effective gait rehabilitation for reduced fall incidence. One available metric is the maximum margin of stability (MOSmax), which is calculated using the body’s center of mass (COM) position and velocity along with the location of the maximum center of pressure (COPmax). However, MOSmax has several limitations that may limit stability assessment. Specifically, the assumptions of a fixed COP and constant ground reaction force (GRF) are not applicable to gait. To address these limitations, a modified MOS equation that allows for a variable COP and is not dependent on a constant GRF is presented here. The modified MOS was significantly lower than MOSmax throughout a significant portion of single limb support for normal walking gait. This finding indicates the MOSmax metric may lack sensitivity to instability as it may still be positive when the actual MOS indicates existing or impending instability. This comparison also showed that the MOS might offer additional information about walking stability relevant to gait assessment for fall prevention and rehabilitation. However, like other stability metrics, this capability must be established with further investigations of perturbed and pathological gait.

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Christopher McCrum, Katrin Eysel-Gosepath, Gaspar Epro, Kenneth Meijer, Hans H.C.M. Savelberg, Gert-Peter Brüggemann and Kiros Karamanidis

Posturography is used to assess balance in clinical settings, but its relationship to gait stability is unclear. We assessed if dynamic gait stability is associated with standing balance in 12 patients with unilateral vestibulopathy. Participants were unexpectedly tripped during treadmill walking and the change in the margin of stability (MoSchange) and base of support (BoSchange) relative to nonperturbed walking was calculated for the perturbed and first recovery steps. The center of pressure (COP) path during 30-s stance with eyes open and closed, and the distance between the most anterior point of the COP and the anterior BoS boundary during forward leaning (ADist), were assessed using a force plate. Pearson correlations were conducted between the static and dynamic variables. The perturbation caused a large decrease in the BoS, leading to a decrease in MoS. One of 12 correlations was significant (MoSchange at the perturbed step and ADist; r = −.595, P = .041; nonsignificant correlations: .068 ≤ P ≤ .995). The results suggest that different control mechanisms may be involved in stance and gait stability, as a consistent relationship was not found. Therefore, posturography may be of limited use in predicting stability in dynamic situations.

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Dusa Marn-Vukadinovic and Helena Jamnik

Context:

Valid patient-based outcome instruments are necessary for comprehensive patient care that focuses on all aspects of health, from impairments to participation restrictions.

Objective:

To validate the Slovenian translation of Medical Outcome Survey (MOS) Short Form Health Survey (SF-36) and to assess relations among various knee measurements, activity tested with Oxford Knee Score (OKS) and health-related quality of life as estimated with SF-36 domains.

Design:

Descriptive validation study.

Setting:

Isokinetic laboratory in outpatient rehabilitation unit.

Participants:

101 subjects after unilateral sport knee injury.

Interventions:

All subjects completed the SF-36 and OKS, and isokinetic knee-muscle strength output at 60°/s was determined in 78 participants. Within a 3-d period, 43 subjects completed the SF-36 and OKS questionnaires again.

Main Outcome Measures:

Reliability testing included internal consistency and test–retest reliability. Correlations between SF-36 subscales and OKS were calculated to assess construct validity, and correlation between SF-36 subscales and muscle strength was calculated to assess concurrent validity.

Results:

Chronbach α was above .78 for all SF-36 subscales. ICCs ranged from .80 to .93. The correlation between OKS and the physical-functioning subscale, showing convergent construct validity, was higher (r = .83, P < .01) than between OKS and mental health (r = .50, P < .01), showing divergent construct validity. Knee-extensor weakness negatively correlated with physical-functioning (r = −.59, P < .01) and social-functioning (r = −.43, P < .01) subscales.

Conclusions:

The Slovenian translation of the SF-36 is a reliable and valuable tool. The relationships between knee-muscle strength and activity and between knee-muscle strength and SF-36 subscales in patients after sport knee injury were established.

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Christopher C. Imes, Yaguang Zheng, Dara D. Mendez, Bonny J. Rockette-Wagner, Meghan K. Mattos, Rachel W. Goode, Susan M. Sereika and Lora E. Burke

Form-36, (MOS SF-36; version 2) were used to assess health-related quality of life. 19 The MOS SF-36 yields 2 summary scores, the physical component and mental component summaries, and 8 domain scores including physical functioning, role limitations due to physical problems, bodily pain, general

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Shijun Zhu, Eun-Shim Nahm, Barbara Resnick, Erika Friedmann, Clayton Brown, Jumin Park, Jooyoung Cheon and DoHwan Park

. †† Fisher’s exact test was used. Table 2 Correlation Coefficients and Descriptive Statistics Among SEE and Exercise Over Time   SEE Baseline SEE 2 mos SEE 6 mos SEE 12 mos Exe Baseline Exe 2 mos Exe 6 mos Exe 12 mos Measures (n = 866) (n = 705) (n = 695) (n = 668) (n = 864) (n = 704) (n = 691) (n = 664) SEE

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Timothy C. Sell, Mita T. Lovalekar, Takashi Nagai, Michael D. Wirt, John P. Abt and Scott M. Lephart

for women to serve in different military occupational specialties (MOS). Women who are assigned to these MOS may require additional or different physical training and they may be at greater risk for injury or different injury types. Ideally, physical training will match the individual’s performance

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Carla L. Dellaserra, Noe C. Crespo, Michael Todd, Jennifer Huberty and Sonia Vega-López

consisting of the Anglo orientation subscale (AOS; 13 items) and Mexican orientation subscale (MOS; 17 items). Three primary factors that ARSMA-II assesses for measuring acculturation level are language; ethnic identity (eg, understanding of one’s groups, feelings about one’s groups); and ethnic interaction

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Johanna M. Hoch, Shelby E. Baez, Robert J. Cramer and Matthew C. Hoch

. PubMed ID: 18668177 doi:10.4085/1062-6050-43.4.437 10.4085/1062-6050-43.4.437 10. Ware JE , Sherbourne CD . The MOS 36-item short-form health survey (SF-36). I: conceptual framework and item selection . Med Care . 1992 ; 30 ( 6 ): 473 – 483 . PubMed ID: 1593914 doi:10

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Lauren T. Ptomey, Eric D. Vidoni, Esteban Montenegro-Montenegro, Michael A. Thompson, Joseph R. Sherman, Anna M. Gorczyca, Jerry L. Greene, Richard A. Washburn and Joseph E. Donnelly

controlled clinical trial . International Journal of Geriatric Psychiatry, 29 ( 8 ), 819 – 827 . PubMed ID: 24338799 doi: 10.1002/gps.4062 McHorney , C.A. , Ware , J.E. , Jr. , & Raczek , A.E. ( 1993 ). The MOS 36-item short-form health survey (SF-36): II. Psychometric and clinical tests of