Skip to main content

Advertisement

Table 2 Statistical powers provided by a sample size of n = 42 (21 per group) if two lesions are evaluable per subject

From: Comparative study of the inhibitory effect on bone erosion progression with denosumab treatment and conventional treatment in rheumatoid arthritis patients: study protocol for an open-label randomized controlled trial by HR-pQCT

Effect size (between-group difference) 1.0 mm
Standard deviation 1.1 mm 1.3 mm
Intra-subject correlation 0.1 0.3 0.5 0.1 0.3 0.5
Statistical power 97.1% 94.5% 91.5% 90.8% 85.8% 80.1%