Table 2

Hip joint space width (JSW) measurement with a 0.5 mm graduated flat ruler2-150

Measurement site2-150Mean ± limits of agreement between two measurements of the same hipMean ± limits
of agreements between right
and left hips
Asymmetical
hip JSW%
Greatest difference (mm)
Superointermediate0.01±0.27+0.05±0.33 90.5
Superolateral0.01±0.23+0.02±0.60401.0
Superomedial0.02±0.40+0.05±0.57180.7
  • 2-150 See Methods for measurement site definition. Percentage of people in whom the difference between the two hip JSW is greater than the within expected intraobserver variation.