Table 1

Subject characteristics and hip function assessments; hip osteoarthritis patients and controls
HIP OA PATIENTS(n=48) CONTROLS(n=22) MEAN DIFFERENCE(95% CI) P-VALUE(TEST USED)
Mean SD Mean SD
Age (years)   59.1   9.48   58.5   8.79 0.6 (−4.21 to 5.33) 0.813(□)
Height (cm) 172.3   8.36 171.7  10.81 0.6 (−0.04 to 0.05) 0.811(□)
Weight (kg)   73.2  12.21  70.8  15.13 2.4 (−4.38 to 9.17) 0.483(□)
Body Mass Index  24.6   3.33  23.8   3.46 0.8 (−0.98 to 2.48) 0.388(□)
Target joint MJSa   1.9   1.05
Harris Hip Score  78.2   8.15  99.5   1.19 −21.3 (−24.73 to −17.76) <0.001(□)
WOMACb
 WOMAC function  22.4  16.38
 WOMAC stiffness  32.1  22.92
 WOMAC pain  25.3  18.07
Hip range of motion (°)
 Flexion 121.2  17.49 138.3   7.77 −17.1 (−25.16 to −8,86) <0.001(◊)
 Extension   0.8   8.56   9.9   5.15 −9.1(−13.00 to −4.78) <0.001(◊)
 Abduction  23.0  10.08  31.4   6.19 −8.4 (−12.60 to −2.90) <0.001(○)
 Adduction  23.5   7.48  25.4   5.39 −1.9 (−5.85 to 1.43) 0.317(○)
 Internal rotation  31.4  15.01  46.7  11.74 −15.3 (−21.69 to −6.58) 0.001(○)
 External rotation  24.3  12.91  44.5   7.49 −20.2 (−26.75 to −14.41) <0.001(◊)
Muscle strength (Nm/BW*100c)
 Hip flexion 120.7  36.65 135.3  31.95 −14.6 (−33.40 to 4.20) 0.126(□)
 Hip extension 197.2  68.96 223.4  57.35 −26.2 (−61.17 to 8.80) 0.140(□)
 Knee flexion  87.7  27.96  98.3  25.18 −10.6 (−25.09 to 3.89) 0.149(□)
 Knee extension 143.6  36.17 177.1  34.01 −33.5 (−52.47 to −14.56) 0.001(□)

a: Minimal joint space.

b: The Western Ontario and McMaster Universities Osteoarthritis Index.

c: Newton meter/body weight*100.

: Student’s t-test.

: Welch’s t-test.

: Mann–Whitney U-test.

Eitzen et al.

Eitzen et al. BMC Musculoskeletal Disorders 2012 13:258   doi:10.1186/1471-2474-13-258

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