Table 1 |
|||||
|
Statistical power of each method of analysis |
|||||
|
Correlation |
ρ = 0.2 |
ρ = 0.35 |
ρ = 0.5 |
ρ = 0.65 |
ρ = 0.8 |
|
|
|||||
|
POST |
70.5% |
70.5% |
70.5% |
70.5% |
70.5% |
|
FRACTION |
45.1% |
56.4% |
67.0% |
82.7% |
97.1% |
|
CHANGE |
50.7% |
59.2% |
70.5% |
84.8% |
97.7% |
|
ANCOVA |
72.3% |
76.1% |
82.3% |
90.8% |
98.6% |
|
|
|||||
|
Vickers BMC Medical Research Methodology 2001 1:6 doi:10.1186/1471-2288-1-6 |
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