TABLE 3.

Receiver Operator Characteristic Area Under the Curve (AUC) and Proportional Risk Contribution (PRC)

	AUC	95% CI	% PRC
Knee pain (n = 1207)
Full model	0.7317	0.7004-0.7630
Partial model without
Knee injury	0.6385	0.6042-0.6727	40.22
Gout	0.7293	0.6978-0.7608	1.04
Digit (2D:4D) ratio	0.7259	0.6945-0.7573	2.50
Familial OA	0.7268	0.6953-0.7583	2.11
High-risk occupation	0.7286	0.6971-0.7602	1.34
BMI	0.7203	0.6885-0.7521	4.92
Partial model without all significant factors (listed above)	0.5645	0.5289-0.6000	72.16
Radiographic knee OA (n = 470)
Full model	0.8424	0.7616-0.9232
Partial model without
Knee injury	0.8195	0.7330-0.9060	6.69
Age	0.6896	0.5842-0.7950	44.63
Position	0.8242	0.7399-0.9115	5.32
Partial model without all significant factors (listed above)	0.6320	0.5228-0.7412	61.45
Total knee replacement (n = 1207)
Full model	0.8457	0.8056-0.8858
Partial model without
Knee injury	0.8115	0.7667-0.8564	9.89
Nodal OA	0.8403	0.7998-0.8808	1.56
Age	0.7554	0.7032-0.8076	26.12
BMI	0.8434	0.8033-0.8836	0.67
Matches played	0.8415	0.8018-0.8811	1.21
Partial model without all significant factors (listed above)	0.6450	0.5856-0.7044	58.06

This table presents the AUC with 95% CI, and corresponding PRC (%) for the full and partial models for each KOA outcome, namely KP, RKOA, and KPR. Supplemental Digital Content 2 (see Appendix 2, http://links.lww.com/JSM/A208) presents the graphical output for the full and partial models. The full model includes all variables listed below:

Age + BMI + digit (2D:4D) ratio + nodal OA + familial OA (knee OA, hip OA, hand OA; and knee replacement) + gout + constitutional malalignment + high-risk occupation + knee injury + career training dose + matches played + main tier (played in) + position.