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Table 4 Post-hoc power estimates for moderation analyses investigating antenatal models of care by small-for-gestational-age birth and pre-term birth (alpha set at 0.10)

From: Improving birth outcomes for women who are substance using or have mental illness: a Canadian cohort study comparing antenatal midwifery and physician models of care for women of low socioeconomic position

Moderating Factor MW vs. GP (%) MW vs. OB (%) GP vs. OB (%)
Small-for-Gestational-Age Birth
 Mental illness 93.96 94.63 28.17
 Substance use 72.05 83.46 29.69
 Teen mother 6.43 19.80 47.04
 Mental illness, substance usea 18.25
Preterm Birth
 Mental illness 48.79 99.97 99.95
 Substance use 47.40 99.37 99.96
 Teen mother 6.96 12.70 40.57
 Social assistance 12.50 52.39 75.36
 Neigh. SEP 96.77 100 100
 Mental illness, substance usea 95.83
 Mental illness, social assistance 41.30 87.37 82.03
 Substance use, social assistancea 94.62
  1. Abbreviations: MW midwife, GP general practitioner, OB obstetrician, Neigh neighbourhood
  2. aPercentage suppressed due to low frequency of cases