Odds ratios of venous thromboembolism by quintiles of coagulation factors. Analyses were adjusted for age, sex, race, and study. ♦ represents factor IX; ■, factor X; ▴, factor XI; □, factor XII; and ●, factor XIII. Fifth quintile cutoffs are 167% for factor IX, 161% for factor X, 157% for factor XI, 179% for factor XII, and 171% for factor XIII.