Table 2 Power to Detect Differences in Means of Continuous Outcomes in the Two-Year Study
Sample Size per Group | Standardized Effect Size | |||
|---|---|---|---|---|
0.15 | 0.25 | 0.4 | 0.5 | |
60 | 0.30 | 0.60 | 0.92 | 0.98 |
90 | 0.40 | 0.76 | 0.98 | >0.99 |
120 | 0.49 | 0.85 | >0.99 | >0.99 |
150 | 0.55 | 0.91 | >0.99 | >0.99 |
160 | 0.59 | 0.93 | >0.99 | >0.99 |
170 | 0.61 | 0.94 | >0.99 | >0.99 |