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Table 1 Statistical power of each method of analysis

From: The use of percentage change from baseline as an outcome in a controlled trial is statistically inefficient: a simulation study

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%