A significant association with PTH was observed for traumatic subarachnoid hemorrhage (tSAH), particularly in the shunt cohort with convexity tSAH > 5 mm in 32.34% (n = 11) and basal cistern tSAH in 23.5% (n = 8), compared with 15.2% (n = 14) and 5.4% (n = 5), respectively, in the non-shunt group (convexity tSAH > 5 mm, p = 0.044; basal cistern tSAH, p = 0.006) (Fig. 5). This evidence concerns the gene PTH and subarachnoid hemorrhage.