Table 4 Power calculations
Primary outcomes | Assumptions regarding control group mean | Full sample (unadjusted) | Full sample (Bonferroni) | Vulnerable subgroup (unadjusted) | Vulnerable subgroup (Bonferroni) | ||||
|---|---|---|---|---|---|---|---|---|---|
Low attrition | High attrition | Low attrition | High attrition | Low attrition | High attrition | Low attrition | High attrition | ||
Adverse birth outcome | 24% | − 3.5 pp. (14%) | − 3.6 pp. (15%) | − 4.3 pp. (18%) | − 4.4 pp. (18%) | − 5.2 pp. (21%) | − 5.4 pp. (22%) | − 6.3 pp. (26%) | − 6.6 pp. (27%) |
Birth spacing | 13% | − 2.7 pp. (20%) | − 2.8 pp. (21%) | − 3.3 pp. (25%) | − 3.4 pp. (26%) | − 3.9 pp. (30%) | − 4.1 pp. (31%) | − 4.8 pp. (36%) | − 5.0 pp. (38%) |
Acute injury, abuse or neglect | 18% | − 3.1 pp. (17%) | − 3.2 pp. (18%) | − 3.8 pp. (21%) | − 3.9 pp. (22%) | − 4.6 pp. (26%) | − 4.7 pp. (26%) | − 5.6 pp. (31%) | − 5.8 pp. (32%) |