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Table 2 Abnormal umbilical artery Doppler studies in small for gestational age neonates

From: Significance of abnormal umbilical artery Doppler studies in normally grown fetuses

 Total
N = 2744
Number (%) in groupP value
SGA
N = 379
Non-SGA
N = 2365
Abnormal UADS (%)98 (3.6)26 (6.9)72 (3.0)<  0.001
One abnormal parameter (%)38 (1.4)8 (2.1)30 (1.3)<  0.001
Two abnormal parameters (%)16 (.6)4 (1.1)12 (.5)NS
Three abnormal parameters (%)44 (1.6)14 (3.7)30 (1.3)<  0.001
Abnormal S/D (%)60 (2.2)19 (5)41 (1.7)<  0.001
Abnormal PI (%)78 (2.8)21 (5.5)57 (2.4)<  0.001
Abnormal RI (%)65 (2.4)18 (4.8)47 (2.0)<  0.001
  1. Chi square test was used
  2. UADS Umbilical artery Doppler study, S/D Systolic-to-diastolic ratio, PI Pulsatility index, RI Resistance index, SGA Small for gestational age, NS Not significant