Multivariate Radiological-Based Models for the Prediction of Future Knee Pain: Data from the OAI

Table 8

Multivariate models on semiquantitative X-ray data.

Time point	T-0			T-1			T-2
Model variables	Osteophytes (OARSI grades 0–3) femur medial compartment			Osteophytes (OARSI grades 0–3) femur medial compartment			Osteophytes (OARSI grades 0–3) femur medial compartment
	Chondrocalcinosis (grades 0-1) medial compartment			Chondrocalcinosis (grades 0-1) medial compartment			Chondrocalcinosis (grades 0-1) medial compartment
	Osteophytes (OARSI grades 0–3) femur lateral compartment						Osteophytes (OARSI grades 0–3) femur lateral compartment
	Osteophytes (OARSI grades 0–3) tibia lateral compartment
Accuracy	Accuracy: 0.6423			Accuracy: 0.626			Accuracy: 0.618
C.I.	95% CI: (0.5509, 0.7267)			95% CI: (0.5342, 0.7116)			95% CI: (0.5259, 0.704)
-stat	0.671			0.648			0.645
Confusion matrix	PAIN			PAIN			PAIN
	Pred	0	1	Pred	0	1	Pred	0	1
	0	45	29	0	46	32	0	46	33
	1	15	34	1	14	31	1	14	30