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. 2019 Jun 28;116(26):453–458. doi: 10.3238/arztebl.2019.0453

eTable. Specifications of compared trial designs.

Design
SWD SWD SWD Parallel-group CRT
No. of intervention start times 2 3 5 1
No. of individuals per cluster per month 10 10 10 10
Study duration (months) 12 12 12 12
No. of study periods 3 4 6 1
Duration of study periods (months) 4 3 2 12
No. of individuals per period per cluster (m) 40 30 20 120
No. of clusters per start time Depends on correlation parameters
Marginal interindividual variance 1 1 1 1
Variance σ2 of cluster means
For ICC = 0.01 0.035 0.043 0.060 0.018
For ICC = 0.05 0.074 0.082 0.098 0.058
Correlation ρ between cluster means
For ICC = 0.01 0.29 0.23 0.17 Irrel.
For ICC = 0.05 0.68 0.61 0.51 Irrel.