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Sample Size Calculations for Clustered and Longitudinal Outcomes in Clinical Research
book

Sample Size Calculations for Clustered and Longitudinal Outcomes in Clinical Research

by Chul Ahn, Moonseoung Heo, Song Zhang
December 2014
Intermediate to advanced content levelIntermediate to advanced
260 pages
8h 51m
English
Chapman and Hall/CRC
Content preview from Sample Size Calculations for Clustered and Longitudinal Outcomes in Clinical Research
164 Sample Size Calculations for Clustered and Longitudinal Outcomes
TABLE 5.4
Sample size and power for detecting an effect δ
(f)
on slope differences in a
random-slope model (5.4.5) with r
τ
= 0.1 when randomizations occur at the
second level (two-sided significance level α = 0.05)
λ
2
ρ
(r)
N
1
N
(0)
2
Total N ϕ
(r)
1 0.1 0.4/4 5 299 2990 0.801
0.4/8 9 723 13104 0.800
0.2 0.4/4 5 283 2830 0.801
0.4/8 9 712 12816 0.800
0.1 0.5/4 5 191 1910 0.800
0.5/8 9 463 8834 0.801
0.2 0.5/4 5 181 1810 0.800
0.5/8 9 456 8208 0.800
1.5 0.1 0.4/4 5 249 3113 0.801
0.4/8 9 602 13545 0.800
0.2 0.4/4 5 236 2950 0.801
0.4/8 9 594 13365 0.801
0.1 0.5/4 5 160 2000 0.802
0.5/8 9 386 8685 0.801
0.2 ...
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Publisher Resources

ISBN: 9781466556270