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Maternal characteristics in correlation with normal or abnormal MCA/UA ratio.
| MCA/UA>1 (n=424) | MCA/UA<1 (n=314) | Statistical Tests values | P value | |
| Maternal age | 27.3+/-5.0 | 31.1+/-7.2 | ||
| Gestational age at delivery (week) | 38.4 | 34.8 | t-13.86 | <0.0001 |
| Gravidity | 2.5+/-3.2 | 3.6+/-2.1 | ||
| Proteinuria | 323 (76.1%) | 281 (89.4%) | +0.17 (χ2 ) | <0.0001 |
| Cesarean delivery | 265 (62.5%) | 241 (76.7%) | +0.15 (χ2) | <0.0001 |
| Vaginal delivery | 159 (37.5%) | 73 (23.2%) | -0.15(χ2) | <0.0001 |
