APOB and deep vein thrombosis: In age- and sex-adjusted models, decreasing levels of apolipoproteins B and A1 were dose-dependently associated with increased thrombosis risk, with odds ratios of 1.35 (95% confidence interval 1.12–1.62) and 1.50 (95% confidence interval 1.25–1.79) for the lowest category versus the reference category, respectively.