REBA Trunk Score Calculator
REBA trunk posture component only: upright 1, extension/flexion through 20 degrees 2, extension beyond 20 or flexion through 60 degrees 3, flexion beyond 60 degrees 4, twist/sidebend +1; no full score. Caller independently establishes matching units, evidence, method edition and applicability; output is not compliance, diagnosis or work-safety approval.
Description
Rapid Entire Body Assessment (REBA) uses observed trunk posture and additional movement indicators to form a component score.
Rapid Entire Body Assessment (REBA) uses observed trunk posture and additional movement indicators to form a component score.1
That component alone does not provide the complete body assessment or grand risk score. Use this tool to calculate REBA Trunk Score from the supplied measurements and assumptions.
When to use REBA Trunk Score Calculator
Use this tool to calculate REBA Trunk Score from the supplied measurements and assumptions. Establish the observation protocol, units, task and reference population or review criterion before entering measurements.
How to use REBA Trunk Score Calculator and understand its results
- Establish the observation protocol, units, task and reference population or review criterion before entering measurements.
- Enter signedTrunkFlexionDegrees, twistedOrSideBent, using the field meanings and rules below, then run the tool.
- Read rebaTrunkScore. Interpret the fields using their units, signs and evidence conventions below.
- If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| signedTrunkFlexionDegrees | Signed trunk flexion degrees | number | Required |
| twistedOrSideBent | Twisted or side bent | boolean | Required |
Enter trunk angle from −90 through 180 degrees and an explicit combined twistedOrSideBent boolean. Base is 1 at exactly zero, 2 for other angles from −20 through 20, 3 below −20 or above 20 through 60, and 4 above 60. Add one when that combined modifier is true, even if both conditions apply. This is a component score, not Table A or full REBA.
trunkScore=base(angle)+[twistedOrSideBent] Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| rebaTrunkScore | Reba Trunk Score; follow the units, sign, ordering and evidence convention stated above | number |
{
"input": {
"signedTrunkFlexionDegrees": 30,
"twistedOrSideBent": true
},
"output": {
"rebaTrunkScore": 4
}
}Limitations and assumptions
That component alone does not provide the complete body assessment or grand risk score. Interpretation depends on the units, sampling scope and exact model described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.
Alternative or Complementary methods
Use REBA Leg Posture Score Calculator for this related task: REBA leg scoring distinguishes support conditions and knee flexion.
Use REBA Grand Score Risk Category Mapper when its separate inputs and assumptions fit the question: A REBA grand score can be mapped to an action category.
References
-
REBA Trunk Score Calculator — tool.io
Similar or alternative tools
- REBA Leg Posture Score Calculator
REBA leg scoring distinguishes support conditions and knee flexion.
- REBA Grand Score Risk Category Mapper
A REBA grand score can be mapped to an action category.