Sample size and p-values
Study
Size
Number preferring A
% preferring A
95% CI
P Value
1
20
15
75.0%
50.9
91.3
0.04
2
200
115
57.5%
50.3
64.4
0.04
3
2000
1046
52.3%
50.1
54.5
0.04
4
2000000
1001445
50.1%
50
50.1
0.04
Freeman P. The role of p-values in analyzing trial results. Stat Med 1993;12:1443-52.
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