Table 3: Association between potential risk factors and MRI-detected knee cartilage lesions in the total knee among 92 male danish floor layers and 49 male danish graphic designers.

	Model 1 (mutually adjusted)			Model 2 (mutually adjusted)			Model 3 (mutually adjusted)			Model 4 (mutually adjusted)
Exposure Variable	Odds Ratio	95% CI^1	P	Odds Ratio	95% CI^1	P	Odds Ratio	95% CI^1	P	Odds Ratio	95% CI^1	P
Occupation
Floor layer	0.85	(0.24; 2.93)	0.79	0.87	(0.25; 3.02)	0.83	0.88^2	(0.26; 3.04)	0.84	0.93^2	(0.25; 3.48)	0.91
Graphic designer	1	-		1	-		1	-		1	-
Age (per 10 years)	5.50	(1.97; 15.3)	0.0013	5.12	(1.86; 14.1)	0.0017	4.86	(1.64; 14.4)	0.0046	4.91	(1.65; 14.6)	0.0045
BMI (per 5 kg/m^2)				1.70	(0.78; 3.69)	0.18	1.71	(0.79; 3.70)	0.17	1.70	(0.78; 3.69)	0.18
Floor layer seniority (per 10 years)							1.11	(0.49; 2.48)	0.81	1.11	(0.49; 2.49)	0.80
Earlier knee injuries
Yes										1.02	(0.15; 7.07)	0.98
No										1	-
Participates in knee straining sports
Yes										1.20	(0.36; 4.06)	0.77
No										1	-

¹CI: Confidence Interval

²Estimated odds ratio of floor layers of 32-years’ seniority compared to graphic designers.