4.4 Article

Strength and functional deficits in individuals with hip osteoarthritis compared to healthy, older adults

Journal

DISABILITY AND REHABILITATION
Volume 36, Issue 4, Pages 307-312

Publisher

TAYLOR & FRANCIS LTD
DOI: 10.3109/09638288.2013.790491

Keywords

Hip; joint degeneration; muscles; osteoarthritis

Categories

Funding

  1. NIH/NCRR Colorado CTSI [UL1 RR025780]
  2. American College of Rheumatology REF/Abbot Health Professional Graduate Student Research Preceptorship Award
  3. NATIONAL CENTER FOR ADVANCING TRANSLATIONAL SCIENCES [UL1TR001082] Funding Source: NIH RePORTER
  4. NATIONAL CENTER FOR RESEARCH RESOURCES [UL1RR025780] Funding Source: NIH RePORTER
  5. NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES [P30DK048520] Funding Source: NIH RePORTER
  6. NATIONAL INSTITUTE ON AGING [K23AG029978] Funding Source: NIH RePORTER

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Purpose: Hip osteoarthritis (OA) compromises quality of life for many individuals. This study quantified deficits in functional capacity for use in rehabilitation goal setting by combining assessments of muscle strength, function and physical activity in patients with hip OA and healthy adults. Method: Twenty-six patients with end-stage hip OA and 18 healthy adults participated. Isometric muscle strength around the hip and knee was measured. Function was assessed using stair climbing, five-time-sit-to-stand, timed-up-and-go and 6-minute walk tests. The UCLA activity rating scale assessed physical activity. Analyses of covariance (ANCOVA) were used to assess differences between groups. Results: Patients had 30% less knee extensor (p < 0.001), 38% less knee flexor (p < 0.001), 10% less hip flexor (p = 0.47), 23% less hip extensor (p = 0.24) and 17% less hip abductor strength (p = 0.23) than healthy adults. Hip adductor strength was equal between groups (p = 0.93). Patients were 50% slower on the stair climbing test (p = 0.001), 34% slower on the timed-up-and-go test (p = 0.004), 34% slower on the five-time-sit-to-stand test (p = 0.001), and walked 28% less during the 6-min walk test (p < 0.001). Patients were less physically active (p = 0.001). Conclusions: Patients had deficits in muscle strength, function and physical activity compared to healthy adults. Quantifying these deficits provides benchmarks for improvement during rehabilitation.

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