TABLE 5. Age-adjusted prevalence (%) of edema, history of superficial thrombotic events, and history of deep thrombotic events, by visible and functional disease, San Diego, California, 1994–1998.

	Normal	Superficial functional disease	Deep functional disease
Edema
Normal	1.7†	0.6	6.6
Spider veins	1.8	14.9*	10.5*
Varicose veins	3.9	7.4*	15.6*
Trophic changes	40.8*	30.0*	48.2*
Superficial events
Normal	0.6†	0.0	5.3*
Spider veins	0.4	10.0*	0.0
Varicose veins	1.2	4.1*	1.2
Trophic changes	0.2	4.9*	11.3*
Deep events
Normal	1.3†	0.0	5.4
Spider veins	1.7	0.0	5.4*
Varicose veins	3.0	2.4	6.6*
Trophic changes	7.7*	7.6*	24.6*

^*p < 0.005.

^†Reference group.