Table 2.

Risk for worse cartilage morphology scores at the medial and lateral tibiofemoral joint and the patellofemoral joint in men with knee osteoarthritis by occupational exposure.

	Occupational Exposures
	Heavy Lifting	Squatting/Kneeling and Heavy Lifting	Neither
Medial tibiofemoral joint
% knees with cartilage morphology scores ≥ 2 in any region*	64	67	67
% regions with cartilage morphology scores ≥ 2*	49	50	44
Crude odds ratio (95% CI)	1.2 (0.6, 2.3)	1.2 (0.7, 2.2)	Referent
Adjusted odds ratio (95% CI)†	1.4 (0.7, 2.6)	1.6 (0.9, 3.0)	Referent
Lateral tibiofemoral joint
% knees with cartilage morphology scores ≥ 2 in any region*	33	30	31
% regions with cartilage morphology scores ≥ 2*	16	11	14
Crude odds ratio (95% CI)	1.2 (0.5, 2.8)	0.8 (0.4, 1.7)	Referent
Adjusted odds ratio (95% CI)†	1.2 (0.5, 2.7)	0.8 (0.4, 1.8)	Referent
Patellofemoral joint
% knees with cartilage morphology scores ≥ 2 in any region*	60	72	47
% regions with cartilage morphology scores ≥ 2*	32	34	24
Crude odds ratio (95% CI)	1.5 (0.8, 2.6)	1.6 (1.0, 2.7)	Referent
Adjusted odds ratio (95% CI)†	1.5 (0.8, 2.7)	1.8 (1.1, 3.2)	Referent

^*Equivalent to original Whole Organ MRI Score ≥ 4.

^†Adjusted for age, body mass index, and history of injury or surgery to the imaged knee.