The 31-SNP risk allele distribution in patients with venous thrombosis and control subjects and corresponding ORs. The number of risk alleles was counted for cases and control subjects (top panel). ORs (95% CI) for venous thrombosis were calculated relative to the median number of risk alleles among control subjects (24 risk alleles; bottom panel). Persons with 15 or less and 36 or more risk alleles were combined for the calculation of the OR because of the low numbers of persons with that few or many risk alleles (bottom panel).