Table 1 Power to detect differences between the two intervention arms at a significance level of 5%, assuming a coefficient of variation of 0.2
Outcome | Sample size per arm | Prevalence in standard intervention arm | Risk ratio for intervention effect | ||
|---|---|---|---|---|---|
1.4 | 1.5 | 1.6 | |||
Wheeze within last 12 months in participants ≥5-years-old | 1,300 | 10% | 67% | 83% | 92% |
Atopy: positive skin prick test in participants ≥1-year-old | 1,560 | 10% | 72% | 87% | 95% |
Atopy: allergen-specific immunoglobulin E concentration >0.35 kUA/L in participants ≥1-year-old | 1,560 | 10% | 72% | 87% | 95% |