Table 5.

Multivariate Analysis of Demographic and Baseline Characteristics as Potential Risk Factors for Venous Outflow Obstruction

Characteristic		Venous Outflow Obstruction in Left Leg Only	Venous Outflow Obstruction in Right Leg Only	Venous Outflow Obstruction in Either Leg
		------------------------------ Odds Ratio (95% Confidence Intervals) -----------------------------
DVT Same Leg		6.7 (2.7, 16.6)‡	3.6 (1.4, 9.5)†	5.0 (2.6, 9.6)‡
DVT Opposite Leg		2.1 (0.8, 5.8)	1.6 (0.6, 4.2)	1.8 (0.9, 3.7)
Age at Visit	Δ per 10 years	1.8 (1.2, 2.6)†	2.0 (1.4, 3.0)‡	1.8 (1.4, 2.4)‡
Male		2.1 (0.8, 5.3)	1.6 (0.6, 3.9)	1.9 (0.9, 4.0)
Time Since Event	Δ per 5 years
	10 vs 5	0.9 (0.5, 1.9)	1.0 (0.5, 2.0)	1.0 (0.6, 1.6)
	15 vs 10	1.1 (0.8, 1.6)	1.0 (0.7, 1.4)	1.0 (0.8, 1.4)
	20 vs 15	1.2 (0.9, 1.7)	1.0 (0.6, 1.4)	1.1 (0.9, 1.5)
	25 vs 20	1.4 (0.8, 2.5)	1.0 (0.5, 2.0)	1.2 (0.8, 2.0)

^*p-value<0.05

^†p-value<0.01

^‡p-value<0.001