OBJECTIVE: To evaluate the discriminant validity and, for clinicians, the test-retest reliability of isometric force in patients with knee osteoarthritis (OA). METHODS: Mean isometric muscle strength data collected for 113 patients with knee OA were compared with published normative data for 131 asymptomatic subjects. RESULTS: Patients with knee OA, ages 60-79 years, could attain only 40-53% of the knee extensor force and 35-46% of the knee flexor force generated by their age- and sex-matched peers. One-week test-retest intraclass correlations ranged from 0.79 to 0.95. Random measurement error demonstrated a favorable "signal-to-noise" ratio. CONCLUSION: The similar decrease in knee extensor and knee flexor strength demonstrated by patients with knee OA compared with their age- and sex-matched asymptomatic peers suggests that strategies should be directed at both muscle groups to optimally limit joint damage. Isometric muscle force measurement can be a useful assessment tool for clinicians.
OBJECTIVE: To evaluate the discriminant validity and, for clinicians, the test-retest reliability of isometric force in patients with knee osteoarthritis (OA). METHODS: Mean isometric muscle strength data collected for 113 patients with knee OA were compared with published normative data for 131 asymptomatic subjects. RESULTS:Patients with knee OA, ages 60-79 years, could attain only 40-53% of the knee extensor force and 35-46% of the knee flexor force generated by their age- and sex-matched peers. One-week test-retest intraclass correlations ranged from 0.79 to 0.95. Random measurement error demonstrated a favorable "signal-to-noise" ratio. CONCLUSION: The similar decrease in knee extensor and knee flexor strength demonstrated by patients with knee OA compared with their age- and sex-matched asymptomatic peers suggests that strategies should be directed at both muscle groups to optimally limit joint damage. Isometric muscle force measurement can be a useful assessment tool for clinicians.
Authors: Neil A Segal; Elizabeth R Boyer; Robert Wallace; James C Torner; H John Yack Journal: Arch Phys Med Rehabil Date: 2012-10-09 Impact factor: 3.966
Authors: Robert Jastrząbek; Anna Straburzyńska-Lupa; Radosław Rutkowski; Wojciech Romanowski Journal: Rheumatol Int Date: 2013-02-10 Impact factor: 2.631
Authors: Ian F H Koblbauer; Yannick Lambrecht; Micheline L M van der Hulst; Camille Neeter; Raoul H H Engelbert; Rudolf W Poolman; Vanessa A Scholtes Journal: BMC Musculoskelet Disord Date: 2011-10-31 Impact factor: 2.362
Authors: Chung-Wei Christine Lin; Lyn March; Jack Crosbie; Ross Crawford; Stephen Graves; Justine Naylor; Alison Harmer; Stephen Jan; Kim Bennell; Ian Harris; David Parker; Helene Moffet; Marlene Fransen Journal: BMC Musculoskelet Disord Date: 2009-06-17 Impact factor: 2.362