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Table 5 Assumed prevalence for primary outcomes for calculations of sample size

From: eRegQual—an electronic health registry with interactive checklists and clinical decision support for improving quality of antenatal care: study protocol for a cluster randomized trial

Outcome measure

Control group prevalence

Adverse pregnancy outcomes: composite of any of the five conditions below, accounting for coexistence of conditions in 10% of women

0.145

1. Moderate or severe anemia at admission for labor

0.0225

2. Large-for-gestational age baby at delivery

0.054

3. Small-for-gestational age baby at delivery undetected during pregnancy

0.057

4. Malpresentation at delivery undetected during pregnancy

0.02

5. Severe hypertension at admission for labor

0.01

Process (adherence) outcomes

0.40–0.60