Description
Map one factor value to a supplied stratum code.
Allocation bookkeeping distinguishes arm counts, indexing and vocabulary matches from generation of a concealed random sequence. Floored targets can leave unassigned remainders, and a local balance score does not establish that an allocation method protects a trial from selection bias.
Map one factor value to a supplied stratum code.
When to use this tool
Use Trial Stratification One Factor Code when checking the stated clinical-research record, allocation, timing, analysis or evidence-basis convention.
How to use the tool and how it works
- Enter value, levels, stratumCodes. Keep parallel arrays aligned. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read code, index. Use the output convention below.
Map one factor value to a supplied stratum code. Require aligned levels/stratumCodes, unique levels and recognized value; return matching code and zero-based index.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| value | Value | Required. Text; maximum UTF-16 length 8192. |
| levels | Levels | Required. Array of text; maximum UTF-16 length 8192; maximum items 256. |
| stratumCodes | Stratum Codes | Required. Array of text; maximum UTF-16 length 8192; maximum items 256. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| code | Code | Required. Text; maximum UTF-16 length 8192. |
| index | Position under the explicit indexing convention; inspect any missing-value sentinel. | Required. Safe integer. |
{
"input": {
"value": "B",
"levels": [
"A",
"B"
],
"stratumCodes": [
"S1",
"S2"
]
},
"output": {
"code": "S2",
"index": 1
}
}Limitations and assumptions
- Code definitions and factor measurements are supplied; this does not create randomization or establish appropriate stratification.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
Alternative or Complementary methods
Use the complete approved protocol, authenticated source records and qualified clinical/statistical oversight for actual trial design, conduct and interpretation.
References
Similar or alternative tools
- Trial Study Arm Allocation Ratio Term
Return ideal and floored trial-arm allocations.
- Trial Minimization Supplied Arm Imbalance Term
Return imbalance after one proposed arm assignment.