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Table 2 Individual patient serum sodium and intracranial pressure correlations

From: The relationship between serum sodium and intracranial pressure when using hypertonic saline to target mild hypernatremia in patients with head trauma

Patient group Patients in each R2 quartile
  < 0.25 0.26 to 0.5 0.51 to 0.75 > 0.75
All patients 63 (81%) 9 (11%) 6 (8%) 0 (0%)
Those with craniotomy/craniectomy 33 (77%) 6 (14%) 4 (9%) 0 (0%)
Those with ventriculostomy 28 (90%) 2 (7%) 1 (3%) 0 (0%)
Those with continuous infusion hypertonic saline 10 (100%) 0 (0%) 0 (0%) 0 (0%)
Those without ventriculostomy, craniotomy/craniectomy, or continuous infusion hypertonic saline 19 (90%) 2 (10%) 0 (0%) 0 (0%)
  1. Data presented as n (%). Each serum sodium measurement was matched to the corresponding intracranial pressure to calculate individual R2 values for every patient. Patients were divided into different groups based on whether or not they received various treatments and/or procedures during the study period (for example, craniectomy, ventriculostomy, continuous infusion hypertonic saline). The number of patients per group falling into each R2 quartile is provided.