Plots of estimated ORs for overall, provoked, and unprovoked VTE and unprovoked deep vein thrombosis as a function of time from baseline (1994-1995) to VTE events. Participants with plasma VWF levels in the highest quartile were compared with those with levels in the lowest quartile (Q4 vs Q1). Analyses were adjusted for age and sex. Filled symbols indicate ORs with P < .05. Number of VTE events according to time of follow-up are provided above the plots. Max, maximum; T4, Tromsø 4 survey.