Table 2 Sample size calculation for the cross-sectional and longitudinal study
Expected no. of evaluable patients | Expected standard error | Expected width of 95% confidence interval | |
|---|---|---|---|
Overall | 3,000 | 0.8% | ± 1.7% |
Country | 500 | 2.0% | ± 4.1% |
5-years age group | 1,000 | 1.4% | ± 2.9% |
5-years age group per country | 167 | 3.5% | ± 7.1% |