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468001 occurrences (No.36 in the rank) during 5 years in the PubMed. [no cache] 500 found

117) In this article, we propose a new randomization strategy, termed the minimal sufficient balance randomization, which will dually prevent serious imbalances in all important baseline covariates, including both categorical and continuous types, and preserve the randomness of treatment allocation.

--- ABSTRACT ---

PMID:22287602 DOI:10.1177/0962280212436447

2015 Statistical methods in medical research

* Minimal sufficient balance-a new strategy to balance baseline covariates and preserve randomness of treatment allocation.

- In many clinical trials, baseline covariates could affect the primary outcome. Commonly used strategies to balance baseline covariates include stratified constrained randomization and minimization. Stratification is limited to few categorical covariates. Minimization lacks the randomness of treatment allocation. Both apply only to categorical covariates. As a result, serious imbalances could occur in important baseline covariates not included in the randomization algorithm. Furthermore, randomness of treatment allocation could be significantly compromised because of the high proportion of deterministic assignments associated with stratified block randomization and minimization, potentially resulting in selection bias. Serious baseline covariate imbalances and selection biases often contribute to controversial interpretation of the trial results. The National Institute of Neurological Disorders and Stroke recombinant tissue plasminogen activator Stroke Trial and the Captopril Prevention Project are two examples. In this article, we propose a new randomization strategy, termed the minimal sufficient balance randomization, which will dually prevent serious imbalances in all important baseline covariates, including both categorical and continuous types, and preserve the randomness of treatment allocation. Computer simulations are conducted using the data from the National Institute of Neurological Disorders and Stroke recombinant tissue plasminogen activator Stroke Trial. Serious imbalances in four continuous and one categorical covariate are prevented with a small cost in treatment allocation randomness. A scenario of simultaneously balancing 11 baseline covariates is explored with similar promising results. The proposed minimal sufficient balance randomization algorithm can be easily implemented in computerized central randomization systems for large multicenter trials.

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(1)55 the	(10)3 all	(20)2 an	(29)2 lower
(2)28 13	(11)3 cell	(21)2 angiogenesis,	(30)2 lung
(3)11 a	(12)3 our	(22)2 appropriate	(31)2 many
(4)7 those	(13)3 reduced	(23)2 autism	(32)2 questions
(5)5 in	(14)3 their	(24)2 changes	(33)2 studies
(6)5 its	(15)3 three	(25)2 depression,	(34)2 topical
(7)4 2	(17)2 3	(26)2 improved	(35)2 two
(8)4 both	(18)2 37	(27)2 increased
(9)3 age,	(19)2 activated	(28)2 induction

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--- WordNet output for including --- =>含む Overview of verb include The verb include has 4 senses (first 4 from tagged texts) 1. (234) include -- (have as a part, be made up out of; "The list includes the names of many famous writers") 2. (32) include -- (consider as part of something; "I include you in the list of culprits") 3. (18) include -- (add as part of something else; put in as part of a set, group, or category; "We must include this chemical element in the group") 4. (8) admit, let in, include -- (allow participation in or the right to be part of; permit to exercise the rights, functions, and responsibilities of; "admit someone to the profession"; "She was admitted to the New Jersey Bar") --- WordNet end ---