Fig. 2.

Correlations in the final sample of 250 patients between self-reported hip pain scores on a numerical rating scale and a) Association Research Circulation Osseous (ARCO) stage, b) presence or absence of bone marrow oedema, c) grade of joint effusion, d) score on the Pain Catastrophizing Scale, e) score on the Generalized Anxiety Disorder-7 survey, and f) score on the Central Sensitization Inventory. The correlations are assessed using box-whisker plots for the categorical variables in a) to c), or as linear regression plots for the continuous variables in d) to f), where the blue shaded area refers to the 95% CI. *p < 0.05, **p < 0.01.