. Author manuscript; available in PMC: 2017 Feb 21.

Published in final edited form as: Am J Perinatol. 2015 Jul 14;33(1):57–62. doi: 10.1055/s-0035-1556757

Table 2.

Intra- and Inter-observer Variability in Eccentricity Index and Systolic-Diastolic Ratio

	Intra-observer Mean Difference (limits of agreement)	Inter-observer Mean Difference (limits of agreement)

Systolic EI	−0.032 (−0.275 to 0.211)	0.025 (−0.263 to 0.313)
Diastolic EI	−0.028 (−0.217 to 0.161)	0.004 (−0.314 to 0.321)
SD Ratio	0.02 (−0.515 to 0.555)	0.184 (−0.846 to 1.213)

Data represented: median (25^th%, 75^th%)

EI- Eccentricity Index; SD- Systolic-Diastolic Ratio; BPD- Bronchopulmonary Dysplasia; PH- Pulmonary Hypertension