Association between the rs12343867 genotype and laboratory characteristics in patients with splanchnic vein thrombosis. This figure depicts the association between the rs12343867 genotype and hemoglobin levels (A) and red blood cell count (B) in patients with splanchnic vein thrombosis who were homozygous carriers of the common allele (TT) or homozygous carriers of 46/1 (CC). In the JAK2^V617F-negative group, exclusion of the patients with MPN did not fundamentally alter the associations. Boxplots illustrate the 95% range (vertical lines), median (horizontal lines), and interquartile range (boxes). Comparison between hemoglobin levels and red blood cell counts among the haplotypes was performed using the Kruskal-Wallis test.