Table 4 The results validated using our proposed RPOA diagnostic criteria

Age > 65

Control

0.009^a

0.694

0.000^a

Pelvic tilt < 0.5

0.001^a

0.032^a

0.000^a

Tonnis angle ≥5°

0.485

0.049^a

0.001^a

Superior joint space narrowing

> 2 mm per year

0.070

0.021^a

0.001^a

Leg length shortening

> 10 mm per year

0.285

0.001^a

0.008^a

Superior acetabular bone loss

> 5 mm per year

0.004^a

0.000^a

0.000^a

Acetabular volumetric widening

> 5 mm per year

0.252

0.008^a

0.020^a

Head vertical diameter change

> 5 mm per year

0.156

0.000^a

0.031^a

Head horizontal diameter change

> 5 mm per year

0.282

0.004^a

0.095