An examination chair to measure internal rotation of the hip in routine settings: a validation study

Reichenbach, Stephan; Jüni, Peter; Nüesch, Eveline; Frey, Franz; Ganz, Reinhold; Leunig, Michael (2010). An examination chair to measure internal rotation of the hip in routine settings: a validation study. Osteoarthritis and cartilage, 18(3), pp. 365-371. Amsterdam: Elsevier 10.1016/j.joca.2009.10.001

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OBJECTIVE: To determine the performance of a newly developed examination chair as compared with the clinical standard of assessing internal rotation (IR) of the flexed hip with a goniometer.

METHODS: The examination chair allowed measurement of IR in a sitting position simultaneously in both hips, with hips and knees flexed 90 degrees, lower legs hanging unsupported and a standardized load of 5 kg applied to both ankles using a bilateral pulley system. Clinical assessment of IR was performed in supine position with hips and knees flexed 90 degrees using a goniometer. Within the framework of a population-based inception cohort study, we calculated inter-observer agreement in two samples of 84 and 64 consecutive, unselected young asymptomatic males using intra-class correlation coefficients (ICC) and determined the correlation between IR assessed with examination chair and clinical assessment.

RESULTS: Inter-observer agreement was excellent for the examination chair (ICC right hip, 0.92, 95% confidence interval [CI] 0.89-0.95; ICC left hip, 0.90, 95% CI 0.86-0.94), and considerably higher than that seen with clinical assessment (ICC right hip, 0.65, 95% CI 0.49-0.77; ICC left hip, 0.69, 95% CI 0.54-0.80, P for difference in ICC between examination chair and clinical assessment <or=0.001). The average range of motion (ROM) obtained with examination chair and clinical assessment were similar (difference 1.1 degrees, 95% CI - 0.7-2.8 degrees, P=0.23), and the correlation was strong (Pearson's coefficient, 0.75, 95% CI 0.62-0.84).

CONCLUSIONS: The use of the examination chair resulted in a precise assessment of hip IR in our population-based inception cohort study of young asymptomatic males. It was strongly correlated with standard clinical assessment of IR but was considerably more reliable.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery
04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Social and Preventive Medicine (ISPM)

UniBE Contributor:

Reichenbach, Stephan; Jüni, Peter; Nüesch, Eveline; Ganz, Reinhold and Leunig, Michael

Subjects:

600 Technology > 610 Medicine & health
300 Social sciences, sociology & anthropology > 360 Social problems & social services

ISSN:

1063-4584

Publisher:

Elsevier

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:07

Last Modified:

21 Dec 2014 17:55

Publisher DOI:

10.1016/j.joca.2009.10.001

PubMed ID:

19833251

Web of Science ID:

000275970400013

BORIS DOI:

10.7892/boris.43

URI:

https://boris.unibe.ch/id/eprint/43 (FactScience: 192785)

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