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Table 3 Multivariate analysis with the dependent variable as the log transform of gravimetric blood loss

From: Identifying the risk: a prospective cohort study examining postpartum haemorrhage in a regional Australian health service

  Full model Reduced model
  Effect size (η p 2 ) Sig Effect size (η p 2 ) Sig
Intercept .060 .000 0.232 0.000
 Maternal Age .003 .331   
 BMI .001 .487   
Baby Birth Weight .017 .013 0.018 0.009
 Gestation .006 .132   
 (Ln) Length First Stage .006 .163 0.009 0.070
 (Ln) Length Second Stage .001 .537   
 (Ln) Length Third Stage .000 .768   
 Any Smoking (yes/no) .002 .395   
 Previous Birth (yes/no) .000 .841   
Perineal Injury 2nd-4th grade (yes/no) .054 .000 0.050 0.000
 Episiotomy (yes/no) .001 .510   
 Labour onset induced (yes/no) .004 .210   
Labour complications (yes/no) .016 .017 0.018 0.008
 Pharmacological Pain Relief (yes/no) .001 .600   
 Maternal position (upright, non-upright, other) .008 .240   
Baby separated from mother within first hour of birth (yes/no) .008 .101 0.010 0.046
Placental birth management (active/mixed active/physiological) .031 .004 0.033 0.002
 Oxytocic after cord clamping (yes/no) .015 .066 0.013 0.086
 Signs of separation: cord lengthening (yes/no) .002 .370   
Signs of separation: gush of blood or clot (yes/no) .044 .000 0.044 0.000
 Signs of separation: uterus risen above umbilicus (yes/no) .004 .208   
 Signs of separation: maternal urge to push (yes/no) .003 .274   
Adjusted R Squared 0.165   0.167