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Table 3 Median and IQR of color-Doppler and B-mode US ONSD assessment: for all four diameters the comparison between median values differs significantly (p-value < 0.001)

From: The CLOSED protocol to assess optic nerve sheath diameter using color-Doppler: a comparison study in a cohort of idiopathic normal pressure hydrocephalus patients

 

US color-Doppler (n = 27)

US B-mode (n = 23)

p- value

TDR

Median (IQR)

3.1 (2.9–3.6)

5.7 (3.6–6.1)

 < 0.001

SDR

Median (IQR)

3.1 (2.9–3.4)

5.7 (4–6.3)

 < 0.001

TDL

Median (IQR)

3.2 (2.6–3.7)

5.6 (3.9–6.4)

 < 0.001

SDL

Median (IQR)

3 (2.8–3.2)

5.5 (4.1–6.4)

 < 0.001

  1. IQR interquartile range, US ultrasound, TDR transverse diameter right, SDR sagittal diameter right, TDL transverse diameter left, SDL, sagittal diameter left