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Table 3 Preliminary core outcomes and measurement methods

From: How to evaluate the clinical outcome of joint-preserving treatment for osteonecrosis of the femoral head: development of a core outcome set

Outcome Measurement
Pain Visual analogue scale (VAS)
ROM of hip flexion Degree of flexion
Walking distance Meters of autonomous walking
Stable rating of X-ray images Morphological change of the femoral head and density change in the necrotic area