Figure 6.

Differences in patient characteristics between women with and without VCI. Pooled ORs were calculated using RevMan version 5.4.1. (Cochrane Collaboration, Copenhagen, Denmark). Thus, some values may be slightly different from their original state. Because of moderate heterogeneity (A, I² = 43%; C, I² = 54%) and substantial heterogeneity (B, I² = 60%), random-effect analyses were applied. (A) Mean age; (B) rate of nulliparity; (C) rate of prior CD; and (D) rate of fetal malpresentation. Abbreviations: VCI, velamentous cord insertion; CD, cesarean delivery; OR, odds ratio; CI, confidence interval; SE, standard error.