Enum: Allocation¶
How participants came to be in the arm they were in. Open vocabulary: write the source's own wording in the field when nothing here fits.
Permissible Values¶
| Value | Meaning | Description |
|---|---|---|
| randomized | None | Participants were assigned to arms by a random or quasi-random procedure |
| non_randomized | None | Participants were assigned to arms by some deliberate non-random procedure, s... |
| single_arm | None | Every participant received the same thing, so there was nothing to allocate |
| not_applicable | None | Nothing was administered, so allocation does not apply |
Identifier and Mapping Information¶
Schema Source¶
- from schema: https://neurostuff.org/schemas/neuroimaging-study-extraction
LinkML Source¶
name: Allocation
description: 'How participants came to be in the arm they were in. Open vocabulary:
write the source''s own wording in the field when nothing here fits.'
from_schema: https://neurostuff.org/schemas/neuroimaging-study-extraction
rank: 1000
permissible_values:
randomized:
text: randomized
description: Participants were assigned to arms by a random or quasi-random procedure.
non_randomized:
text: non_randomized
description: 'Participants were assigned to arms by some deliberate non-random
procedure, such as clinician choice or self-selection. Something was still administered;
only the procedure that decided who got it was not random.
A characteristic participants already had is not an assignment. Splitting a
sample by diagnosis, exposure or genotype allocates nobody, and the study takes
`not_applicable` here and `observational_cohorts` for its `assignment_structure`.'
single_arm:
text: single_arm
description: Every participant received the same thing, so there was nothing to
allocate. An open-label pre-post drug study is single-arm.
not_applicable:
text: not_applicable
description: Nothing was administered, so allocation does not apply. An observational
cross-sectional study takes this value.