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Table 3 Logistic regression of abnormal umbilical artery Doppler studies and small for gestational age

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

 Unadjusted odds ratio (95% CI)P valueAdjusted odds ratio (95% CI)aP value
Abnormal UADS2.35 (1.48–3.72)<  0.0012.22 (1.38–3.58)<  0.05
One abnormal parameter1.68 (.76–3.69)NS1.47 (0.66–3.30)NS
Two abnormal parameters2.09 (.67–6.52)NS2.02 (0.63–6.50)NS
Three abnormal parameters2.99 (1.57–5.68)<  0.053.01 (1.55–5.86)<  0.05
Abnormal S/D2.99 (1.72–5.21)<  0.0012.99 (1.68–5.31)<  0.001
Abnormal PI2.38 (1.42–3.97)<  0.052.22 (1.31–3.77)<  0.05
Abnormal RI2.46 (1.41–4.28)<  0.052.46 (1.39–4.36)<  0.05
  1. UADS Umbilical artery Doppler study, S/D Systolic to diastolic ratio, PI Pulsatility index, RI Resistance index, NS Not significant
  2. aAdjusted for maternal age at delivery, racial-ethnic background, parity, pre-pregnancy BMI, smoking, and fetal gender