Use of covariates in randomized controlled trials

Comment

Gerard J P Van Breukelen et al. J Int Neuropsychol Soc. 2007 Sep.

. 2007 Sep;13(5):903-4.

doi: 10.1017/s1355617707071147.

No abstract available

Comment on

The effect of cataract surgery on neuropsychological test performance: a randomized controlled trial.
Anstey KJ, Lord SR, Hennessy M, Mitchell P, Mill K, von Sanden C. Anstey KJ, et al. J Int Neuropsychol Soc. 2006 Sep;12(5):632-9. doi: 10.1017/S1355617706060954. J Int Neuropsychol Soc. 2006. PMID: 16961944 Clinical Trial.
Inappropriate use of covariate analysis renders meaningless results.
Gilmore GC. Gilmore GC. J Int Neuropsychol Soc. 2007 Mar;13(2):370; author reply 371. doi: 10.1017/S1355617707070464. J Int Neuropsychol Soc. 2007. PMID: 17286895 No abstract available.