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non-random allocation

— Methods of allocating study participants to treatment comparison groups that are not random, but are intended to produce similar groups.

Synonyms:

quasi-random allocation

Full explanation:

Quasi-random allocation methods include allocation by the participant's date of birth, by the day of the week or month of the year, by a participant's medical record number, or just allocating alternate participants.

In practice, these methods of allocation are relatively easy to manipulate, introducing allocation bias.

See also:

random allocation

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