n

2 Continuous + 4 Study Sites

Between-site variance = 0.5²

Between-site variance = 1

Power (Age)

Power (Push)

Power (Age)

Power (Push)

90

0.282

0.356

0.289

0.358

200

0.514

0.689

0.492

0.662

250

0.643

0.788

0.601

0.762

300

0.709

0.848

0.695

0.811

350

0.786

0.906

0.763

0.874

400

0.847

0.926

0.824

0.922