Odds ratio of venous thrombosis in relation to baseline D-dimer concentration.

Baseline D-dimer values were divided into quintiles of the distribution and the risk of venous thrombosis for each quintile was compared to the first quintile using logistic regression. ▪ represent age-adjusted models; ░, models adjusted for age, sex, race, and BMI; ■, models adjusted for all previous factors and factor V Leiden, prothrombin 20210A, and factor VIII:c above the 80th percentile. D-dimer quintile definitions are given in Table 2.