Table 5. Improvement in Health-Related Quality of Life and Satisfaction after Knee Replacement: A Comparison Between Patients with Mild to Moderate and Severe Radiographical Pre-Operative Osteoarthritis.
SF36 Sub-Scale | Kellgren Grade 0–2:Probability of Achieving a MCID (95%CI) | Kellgren Grade 3+4:Probability of Achieving a MCID (95%CI) | Kellgren Grade 0–2 VS Kellgren Grade 3+4:Adjusted Odds Ratio (95%CI) | P-value |
Physical Functioning | 5/22∶22.7% (10.1–43.4) | 105/191∶55.0% (47.9–61.9) | 5.44 (1.45–20.3) | 0.01 |
Role-Physical | 9/22∶40.9% (23.3–61.3) | 88/191∶46.1% (39.2–53.2) | 1.46 (0.49–4.32) | 0.50 |
Bodily Pain | 15/22∶68.2% (47.3–83.6) | 136/191∶71.2% (64.4–77.2) | 1.15 (0.32–4.16) | 0.83 |
General Health | 9/22∶40.9% (23.3–61.3) | 122/191∶63.9% (56.9–70.4) | 3.56 (1.23–10.4) | 0.02 |
Vitality | 8/22∶36.4% (19.7–57) | 86/191∶45.0% (38.1–52.1) | 1.09 (0.35–3.44) | 0.88 |
Social Functioning | 7/22∶31.8% (16.4–52.7) | 98/191∶51.3% (44.3–58.3) | 2.84 (0.87–9.32) | 0.08 |
Role Emotional | 6/22∶27.3% (13.2–48.2) | 41/191∶21.5% (16.2–27.8) | 0.85 (0.26–3.02) | 0.85 |
Mental Health | 8/22∶36.4% (19.7–57) | 79/191∶41.4% (34.6–48.4) | 2.79 (0.70–11.2) | 0.15 |
NRS Satisfaction >8 | 9/22∶40.9% (23.3–61.3) | 116/191∶60.7% (53.7–67.4) | 2.25 (0.78–6.52) | 0.14 |
Odds Ratios >1 indicate a higher probability of achieving a Minimal Clinically Important Difference in HRQoL after THR in patients with Kellgren Grade 3+4, compared to Grade 0–2.
The odds ratios adjusted for age, sex, Charnley Comorbidity Classification and BMI and stratified for quartiles of follow-up.