1,511
Views
6
CrossRef citations to date
0
Altmetric
CORRESPONDANCE

Better alternatives to permuted block randomization for clinical trials with unequal allocation

&

References

  • Meurer, WJ, Connor, JT, Glassberg, J. Simulation of various randomization strategies for a clinical trial in sickle cell disease. Hematology. 2016. doi:10.1080/10245332.2015.1101966.
  • Rosenberger WF, Lachin, JM. Randomization in clinical trials theory and practice. New York (NY): Wiley; 2002.
  • Zhao W. A better alternative to stratified permuted block design for subject randomization in clinical trials. Stat Med. 2014;33:5239–5248. doi: 10.1002/sim.6266
  • Efron B. Forcing a sequential experiment to be balanced. Biometrika. 1971;58:403–417. doi: 10.1093/biomet/58.3.403
  • Wei LJ. A class of designs for sequential clinical trials. J Am Stat Assoc. 1977;72:382–386. doi: 10.1080/01621459.1977.10481005
  • Soares JF, Wu CF. Some restricted randomization rules in sequential designs. Commun Stat – Theor Methods. 1983;12:2017–2034. doi: 10.1080/03610928308828586
  • Berger, VW. Selection bias and covariate imbalances in randomized clinical trials. Chichester: John Wiley & Sons; 2005.
  • Berger VW. Do not use blocked randomization. Headache. 2006;46(2):343. doi: 10.1111/j.1526-4610.2006.00351_5.x
  • Zhao W, Weng Y. A simplified formula for quantification of the probability of deterministic assignments in permuted block randomization. J Stat Plan Inference. 2011;141(1):474–478. doi: 10.1016/j.jspi.2010.06.023
  • Zhao W, Weng Y, Wu Q, et al. Quantitative comparison of randomization designs in sequential clinical trials based on treatment balance and allocation randomness. Pharm Stat. 2012;11(1):39–48. doi: 10.1002/pst.493
  • Zhao W. Selection bias, allocation concealment and randomization design in clinical trials. Contemp Clin Trials. 2013;36(1):263–265. doi: 10.1016/j.cct.2013.07.005
  • Berger VW, Bejleri K, Agnor R. Comparing MTI randomization procedures to blocked randomization. Stat Med. 2016;35(5):685–694. doi: 10.1002/sim.6637
  • Zhao W. A better alternative to the inferior permuted block design is not necessarily complex. Stat Med. 2016;35(10):1736–1738. doi: 10.1002/sim.6858
  • Berger, VW, Ivanova, A, Deloria-Knoll, M. Minimizing predictability while retaining balance through the use of less restrictive randomization procedures. Stat Med. 2003;22(19):3017–3028. doi: 10.1002/sim.1538
  • Zhao W, Weng Y. Block urn design – a new randomization algorithm for sequential trials with two or more treatments and balanced or unbalanced allocation. Contemp Clin Trials. 2011;32:953–961. doi: 10.1016/j.cct.2011.08.004
  • Kuznetsova OM, Tymofyeyev Y. Brick tunnel randomization for unequal allocation to two or more treatment groups. Stat Med. 2011;30(8):812–824.
  • Zhao W. Mass weighted urn design – a new randomization algorithm for unequal allocations. Contemp Clin Trials. 2015;43:209–216. doi: 10.1016/j.cct.2015.06.008

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.