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Table 6 Relation between groups of placental location and the mean difference between 2D and 3D TVS EOD measurements

From: Towards more accurate measurement of edge to os distance in low-lying placenta using three dimensional transvaginal ultrasound: an innovative technique

Placental location groups Mean difference (2D-3D estimate)(mean ± SD) mm One way ANOVA Games- Howel Post Hoc test
Direct Anterior/posterior 0.85 ± 0.82 0.000 1
Anterolateral/posterolateral 5.33 ± 5.29 0.001
Lateral 13.59 ± 4.56 0.000