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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
192 Sample Size Calculations for Clustered and Longitudinal Outcomes
TABLE 6.1
Sample size and power for detecting a main effect δ
(3)
in model (6.4) when
randomizations occur at the third level with ρ
2
= 0.05 (two-sided significance
level α = 0.05)
λ
3
(3)
ρ
1
N
1
N
2
N
(0)
3
Total N ϕ
(3)
1 0.3 0.1 5 4 19 760 0.805
5 8 14 1120 0.807
0.2 5 4 23 920 0.813
5 8 16 1280 0.813
0.4 0.1 5 4 11 440 0.816
5 8 8 640 0.813
0.2 5 4 13 520 0.815
5 8 9 720 0.813
1.5 0.3 0.1 5 4 16 800 0.809
5 8 12 1200 0.818
0.2 5 4 19 950 0.810
5 8 13 1300 0.803
0.4 0.1 5 4 9 450 0.809
5 8 7 700 0.832
0.2 5 4 11 550 0.821
5 8 8 800 0.837
Note: λ
3
represents the ratio of the number of level 3 units in the interv ...
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Publisher Resources

ISBN: 9781466556270