sccs_size {rashnu} | R Documentation |
Sample Size or Power for Self-Controlled Case Series (SCCS)
Description
Calculates sample size or power for self-controlled case series studies.
Usage
sccs_size(p, r, alpha, beta = NULL, n = NULL)
Arguments
p |
Numeric. True relative incidence (risk period vs baseline). |
r |
Numeric. Proportion of observation time that is risk period. |
alpha |
Numeric. Type I error rate. |
beta |
Numeric (optional). Type II error rate. Required for sample size calculation. |
n |
Integer (optional). Sample size. Required for power calculation. |
Value
Numeric. Returns sample size (if beta
is given), or power (if n
is given).
Note
Only one of beta
(for sample size calculation) or n
(for power calculation) should be specified.
Required arguments:
For sample size:
p
,r
,alpha
,beta
For power:
p
,r
,alpha
,n
Examples
# Sample size
sccs_size(p = 3, r = 42/365,
alpha = 0.05, beta = 0.2)
# Power
sccs_size(p = 3, r = 42/365,
alpha = 0.05, n = 54)
[Package rashnu version 0.1.2 Index]