PUBLIC LIBRARY / CALCULATOR

ELUCENIA adaptation of the Work Ability Index (WAI)

Assesses the worker’s own perception of work ability, considering job demands, disease, absence and mental resources.

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Check the population, units and version. The result shows the formula or classification; it does not make an automatic treatment decision.

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Method · Limits of application

WAI, 7 dimensions: final total 7–49; half points rounded up to the next integer (Tuomi 1998, institutional CHRODIS+ reproduction); Ilmarinen 2007 and Martinez 2009 references retained; original manual not read in full

The index assesses the worker’s perception in relation to the physical and mental demands of work, health and personal resources; it is not an automatic determination of incapacity. Attribute the source and clearly identify adaptations instead of presenting them as the original questionnaire. The consulted 2009 Brazilian study assessed workers at an electricity-sector company in São Paulo; it does not automatically validate every occupation or the nine local translations. The original manual and the complete equivalence of this interface’s items and weightings still require review. The final-rounding check uses page 4 of the institutional CHRODIS+ reproduction citing Tuomi 1998 and the table from the 2016 study of Finnish municipal employees. It does not approve clinical assignment of items, all rubrics, disability prognosis, management or professional translations. The unrounded sum remains available for audit, separately from the final score. This is the ELUCENIA adaptation of the method developed by the Finnish Institute of Occupational Health. The source permits research and use in an organization’s own operations, including commercial organizations, and identified adaptations with attribution. The WAI method itself may not be sold. Item equivalence and clinical and professional language review are not presumed.

Required fields: 0/11 completed

Complete all required fields. Optional fields are marked.

1. Current work ability compared with your lifetime best (0 to 10) required

2. Nature of the work required

2a. Current ability relative to the physical demands of your work required

2b. Current ability relative to the mental demands of your work required

3. Number of current physician-diagnosed diseases (questionnaire list) required

4. Estimated work impairment due to illness required

5. Absence from work due to illness in the past 12 months required

6. From a health perspective, do you believe you will be able to do your current work in 2 years? required

7a. Recently, have you been able to enjoy your daily activities? required

7b. Recently, have you felt active and alert? required

7c. Recently, have you felt hopeful about the future? required

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Conditions of use

Check the population, units, inclusion and exclusion criteria, and version in the original source. A result alone does not establish a diagnosis, discharge decision or prescription.

Documented parameters

1. Current work ability compared with your lifetime best (0 to 10)
2. Nature of the work
2a. Current ability relative to the physical demands of your work
2b. Current ability relative to the mental demands of your work
3. Number of current physician-diagnosed diseases (questionnaire list)
4. Estimated work impairment due to illness
5. Absence from work due to illness in the past 12 months
6. From a health perspective, do you believe you will be able to do your current work in 2 years?
7a. Recently, have you been able to enjoy your daily activities?
7b. Recently, have you felt active and alert?
7c. Recently, have you felt hopeful about the future?

4/4 reference cases checked. Numerical tests are not clinical validation.

Sources and documentation

Documented formula

Transcribed from the source or a recorded revision; this is not a clinical recommendation.

Sum of 7 dimensions: (1) 0–10; (2) physical and mental demands (1–5 each), weighted by job type: mainly physical = physical × 1.5 + mental × 0.5; mainly mental = physical × 0.5 + mental × 1.5; both = physical + mental (2–10); (3) diseases: none 7, one 5, two 4, three 3, four 2, five or more 1; (4) work impairment 1–6; (5) absence 1–5; (6) prognosis 1, 4 or 7; (7) mental resources: sum of three questions (0–12), converted as 0–3=1, 4–6=2, 7–9=3, 10–12=4.

Total 7–49.

The unrounded sum is retained for audit. To display and classify the final total, half points are rounded up to the next integer: 27.5 → 28, 36.5 → 37 and 43.5 → 44. This rule was read in the institutional CHRODIS+ reproduction citing Tuomi 1998; the original manual was not read in full.

References

Identifier: indice-de-capacidade-para-o-trabalho

Original clinical content: Brazilian Portuguese.

Method version

indice-de-capacidade-para-o-trabalho@native-2026-10-05+9583d3353dc2

Ilmarinen J. The Work Ability Index (WAI). Occup Med (Lond), 2007.

The bibliographic edition identifies the source. By itself, it proves neither full conformity of the formula nor clinical approval.

Synthetic cases checked (4)

Synthetic cases for checking the implementation, with no patient data.

Case 1

reference-001

Inputs

1. Current work ability compared with your lifetime best (0 to 10): 10 (best ever in your lifetime)
2. Nature of the work: Physical and mental
2a. Current ability relative to the physical demands of your work: Very good
2b. Current ability relative to the mental demands of your work: Very good
3. Number of current physician-diagnosed diseases (questionnaire list): None
4. Estimated work impairment due to illness: No impairment (or I have no illness)
5. Absence from work due to illness in the past 12 months: None
6. From a health perspective, do you believe you will be able to do your current work in 2 years?: Quite likely
7a. Recently, have you been able to enjoy your daily activities?: Always
7b. Recently, have you felt active and alert?: Always
7c. Recently, have you felt hopeful about the future?: Always

{
  "i1": "10",
  "natureza": "a",
  "i2f": "5",
  "i2m": "5",
  "i3": "7",
  "i4": "6",
  "i5": "5",
  "i6": "7",
  "i7a": "4",
  "i7b": "4",
  "i7c": "4"
}

Expected result

{
  "score": 49
}

Actual result

{
  "score": 49,
  "scoreUnrounded": 49,
  "scoreRounded": 49,
  "i2": 10,
  "i7": 4
}

Case 2

reference-002

Inputs

1. Current work ability compared with your lifetime best (0 to 10): 8
2. Nature of the work: Mainly mental
2a. Current ability relative to the physical demands of your work: Good
2b. Current ability relative to the mental demands of your work: Good
3. Number of current physician-diagnosed diseases (questionnaire list): 1 disease
4. Estimated work impairment due to illness: I can do the work, but it causes some symptoms
5. Absence from work due to illness in the past 12 months: Up to 9 days
6. From a health perspective, do you believe you will be able to do your current work in 2 years?: Quite likely
7a. Recently, have you been able to enjoy your daily activities?: Almost always
7b. Recently, have you felt active and alert?: Almost always
7c. Recently, have you felt hopeful about the future?: Almost always

{
  "i1": "8",
  "natureza": "m",
  "i2f": "4",
  "i2m": "4",
  "i3": "5",
  "i4": "5",
  "i5": "4",
  "i6": "7",
  "i7a": "3",
  "i7b": "3",
  "i7c": "3"
}

Expected result

{
  "score": 40,
  "i2": 8,
  "i7": 3
}

Actual result

{
  "score": 40,
  "scoreUnrounded": 40,
  "scoreRounded": 40,
  "i2": 8,
  "i7": 3
}

Case 3

reference-003

Inputs

1. Current work ability compared with your lifetime best (0 to 10): 7
2. Nature of the work: Physical and mental
2a. Current ability relative to the physical demands of your work: Good
2b. Current ability relative to the mental demands of your work: Moderate
3. Number of current physician-diagnosed diseases (questionnaire list): 2 diseases
4. Estimated work impairment due to illness: I can do the work, but it causes some symptoms
5. Absence from work due to illness in the past 12 months: Up to 9 days
6. From a health perspective, do you believe you will be able to do your current work in 2 years?: I am not very sure
7a. Recently, have you been able to enjoy your daily activities?: Sometimes
7b. Recently, have you felt active and alert?: Sometimes
7c. Recently, have you felt hopeful about the future?: Almost always

{
  "i1": "7",
  "natureza": "a",
  "i2f": "4",
  "i2m": "3",
  "i3": "4",
  "i4": "5",
  "i5": "4",
  "i6": "4",
  "i7a": "2",
  "i7b": "2",
  "i7c": "3"
}

Expected result

{
  "score": 34
}

Actual result

{
  "score": 34,
  "scoreUnrounded": 34,
  "scoreRounded": 34,
  "i2": 7,
  "i7": 3
}

Case 4

reference-004

Inputs

1. Current work ability compared with your lifetime best (0 to 10): 5
2. Nature of the work: Mainly physical
2a. Current ability relative to the physical demands of your work: Moderate
2b. Current ability relative to the mental demands of your work: Good
3. Number of current physician-diagnosed diseases (questionnaire list): 3 diseases
4. Estimated work impairment due to illness: I sometimes need to slow down or change how I work
5. Absence from work due to illness in the past 12 months: 10 to 24 days
6. From a health perspective, do you believe you will be able to do your current work in 2 years?: I am not very sure
7a. Recently, have you been able to enjoy your daily activities?: Sometimes
7b. Recently, have you felt active and alert?: Sometimes
7c. Recently, have you felt hopeful about the future?: Sometimes

{
  "i1": "5",
  "natureza": "f",
  "i2f": "3",
  "i2m": "4",
  "i3": "3",
  "i4": "4",
  "i5": "3",
  "i6": "4",
  "i7a": "2",
  "i7b": "2",
  "i7c": "2"
}

Expected result

{
  "score": 27.5,
  "i2": 6.5,
  "i7": 2,
  "scoreRounded": 28,
  "scoreUnrounded": 27.5
}

Actual result

{
  "score": 27.5,
  "scoreUnrounded": 27.5,
  "scoreRounded": 28,
  "i2": 6.5,
  "i7": 2
}

Code and reproducibility

This tool’s code on GitHub

Download code and tests

Sources, version and reproduction instructions

README

Local installation

Code license: Apache-2.0

Guidelines and conditions

This repository’s license applies to the code. Third-party instruments, questionnaires, data and models remain subject to their owners’ conditions.

The code tests are technical checks. Clinical approval and professional translation review are recorded separately.

Relationship with cancer research

General context — relationship to be defined

A resource for general clinical contexts. This edition does not assign a specific oncological relationship; selecting it for a study requires a justified question, population and purpose.