Independent variable
Univariate Correlation coefficient (95% CI)
p value
Multivariate Correlation coefficient (95% CI) p value
Maternal age
0.001 (-0.001 to 0.003)
0.185
Log10 maternal weight
0.092 (-0.021 to 0.205)
0.109
Log10 maternal height
0.167 (-0.324 to 0.658)
0.504
Log10 maternal body mass index
0.079 (-0.039 to 0.197)
0.190
Smoking
-0.067 (-0.117 to -0.018)
0.008
-0.070 (-0.120 to -0.021)
0.006*
Nulliparity -0.014 (-0.030 to 0.001) 0.073
Near-postdate
-0.022 (-0.041 to -0.003)
0.025
Diabetes
0.034 (0.002 to 0.065)
0.035
0.030 (-0.001 to 0.061)
0.054
Hypertension
0.022 (-0.027 to 0.071)
0.378
Large or small for gestational age
0.013 (-0.012 to 0.039)
0.304
Decrease FM/ Suboptimal CTG
0.010 (-0.017 to 0.037)
0.466
Estimated foetal weight z-score
0.003 (-0.002 to 0.008)
0.284
Umbilical artery PI z-score
4.746E-5 (-0.009 to 0.009)
0.992
Middle cerebral artery PI z-score
-0.001 (-0.008 to 0.006)
0.774
Cerebroplacental ratio z-score
0.001 (-0.007 to 0.008)
0.871
Mean uterine artery PI z-score
0.003 (-0.003 to 0.008)
0.335
Log10 short term variability
0.063 (0.005 to 0.121)
0.035
0.066 (0.008 to 0.124)
0.025*
Dawes-Redman criteria not met
-0.002 (-0.028 to 0.024)
0.876