Model 2 - Hierarchical logistic regression analysis of Persistent Post-surgical Pain 4–6 months (T3) following TKA and THA on demographic and clinical baseline measures (T1), and post-surgical pain and anxiety 48 h after surgery (T2).

<p>Note. After removing 2 outliers, this final model correctly predicted 75% of all patients; <i>χ2</i>(5) = 27.935 <i>p</i><0.001; Nagelkerke <i>R</i><sup>2</sup> = 0.372; OR = odds ratio; CI = confidence interval; bold = significant at <i>p</i>≤.05.</p>1<p>Continuous variable, NRS - Numerical Rating Scale (0–10) from BPI-SF: Brief Pain Inventory-Short Form;</p>2<p>Continuous variable;</p>3<p>Dichotomic variable: 0 = THA: Total Hip Arthroplasty; 1 = TKA: Total Knee Arthroplasty;</p>a<p>Continuous variable, HADS-A: Hospital Anxiety and Depression Scale - anxiety subscale.</p>