From: Effectiveness of strategies to increase the validity of findings from association studies: size vs. replication
Number of
studies
Sample size
per study/Total
Power per
study
Final TRP
after k studies
2
860/1720
0.81
0.80
420/840
0.50
0.60
3
260/780
0.32
420/1260
0.95
4
140/560
0.20