Abstract

Get full access to this article
View all access options for this article.
References
1.
1.
Cohen J
. Statistical power analysis for the behavioral sciences , 2nd edn.
Hillsdale NJ : Lawrence Erlbaum Associates , 1988 .
2.
2.
Machin D
,
Campbell MJ
,
Fayers PM
,
Pinol APY
. Sample size tables for clinical studies , 2nd edn.
Oxford : Blackwell Scientific Publications , 1997 .
3.
3.
Lachin JM
. Introduction to sample size determination and power analysis for clinical trials . Control Clin Trials
1981 ; 2 : 93 –114 .
4.
4.
Donner A
. Approaches to sample size estimation in the design of clinical trials: a review . Stat Med
1984 ; 3 : 199 –214 .
