| ROC | 95% CI | PRC (%) | PRC 95% CI |
---|
Definite NKP vs. non-NKP |
 Full* | 0.90 | 0.88; 0.92 | 100% | – |
 Without peripheral | 0.89 | 0.87; 0.91 | 3% | −2.5; 7.5 |
 Without central | 0.87 | 0.85; 0.89 | 8% | 2.5; 12.5 |
 Without comorbidities | 0.89 | 0.88; 0.91 | 3% | −2.5; 5 |
Non-NKP vs. no KP |
 Full | 0.70 | 0.69; 0.72 | 100% | – |
 Without peripheral | 0.68 | 0.66; 0.69 | 10% | 5; 20 |
 Without central | 0.68 | 0.66; 0.69 | 10% | 5; 20 |
 Without comorbidities | 0.69 | 0.67; 0.70 | 5% | 0; 15 |
- Abbreviations: KP Knee pain, NKP Neuropathic-like knee pain, PRC Proportional risk contribution
- ROC results for the full model including age, gender, body mass index and pain severity
- Peripheral = significant injury, nodal osteoarthritis
- Central = anxiety, depression, Pain Catastrophising Scale (by highest tertile), fatigue, fibromyalgia
- Comorbidities: hyperlipidaemia, diabetes, widespread pain
- Pain severity was not included from the second ROC analysis comparing non-NKP with no KP participants