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Table 2 Paired t test for IVC diameter, aortic diameter and IVC:aortic index

From: Ultrasonographic assessment of inferior vena cava/abdominal aorta diameter index: a new approach of assessing hypovolemic shock class 1

  Mean (95 % CI) t df p value
Pre IVC—post IVC −0.16 (0.11, 0.21) 6.6 51 <0.05
Pre aorta—post aorta −0.05 (0.02, 0.08) 2.9 51 0.035
Pre index—post index 0.07 (0.03, 0.11) 44.1 551 0.01
  1. Paired t test for pre and post blood donation