Relationship between vascular intervention and hyponatremia Relationship between vascular intervention and hyponatremia Table 3.25.Relationship between vascular intervention and hyponatremia Vascular intervention Hyponatremia (n=180) Normal (n=208) OR (95% CI) p Non - intervention (257) 111 (43, 2%) 146 (56, 8%) 1 < 0, 05 Coil embolization (79) 34 (43, 0%) 45 (57, 0%) 1 (0, 6 - 1, 7) Drain, open the skull (52) 35 (67, 3%) 17 (32, 7%) 2, 7 (1, 4 - 5, 1) Comment: Patients with opened or drained skulls had 2.7 times higher risk of hyponatremia than non-intervention patients and the difference was statistically significant with p <0.05.