Revised Upper Extremity Work Demands Scale

Abstract

The Revised Upper Extremity Work Demands scale (UEWD-R) is a concise, six-item questionnaire designed to quantify the physical workload placed upon the upper extremities during occupational activities. Developed as a refinement of the original Upper Extremity Work Demands (UEWD) scale, the UEWD-R is utilized primarily in occupational health and ergonomics research. It comprises two distinct subscales: ‘Strength/Posture’ and ‘Repetition’. The scale yields a total score where a higher measurement represents a greater level of work demands, thereby indicating potentially elevated risk factors for work-related Musculoskeletal Disorders (MSDs) in the upper limbs.

Keywords

Upper Extremity Work Demands, UEWD-R, Workload, Occupational Health, Ergonomics, Strength, Repetition, Posture, Musculoskeletal Disorders, Questionnaire, Physical Demands.

Authors

Original UEWD: Opsteegh L (2010); Revised UEWD-R: Jacobs NW (2016); Dutch version adaptation: Jacobs NW (2016).

Purpose

The primary purpose of the UEWD-R is to provide a standardized, self-report measure for assessing the physical demands experienced by workers concerning their upper limbs. This assessment is crucial for identifying individuals or occupational groups at risk of developing musculoskeletal disorders related to their working environment.

By focusing specifically on quantifiable aspects of work—namely the requirements for strength, maintenance of specific postures, and the rate of repetitive movements—the scale allows researchers and practitioners to evaluate the intensity of physical exposure. This information is valuable for implementing targeted ergonomic interventions and modifying job tasks to reduce occupational strain.

Construct

The UEWD-R measures the latent construct of Physical Work Demands on the Upper Extremities. This construct is operationalized through two distinct, yet related, dimensions which form the subscales of the instrument:

• Strength/Posture: This subscale assesses the demands related to physical exertion, including the force required to perform tasks and the sustained or awkward postures necessary for job completion.
• Repetition: This subscale measures the temporal demands of the work, focusing on the frequency and repetitive nature of movements involving the hands, wrists, arms, and shoulders.

These two subscales capture the main mechanical stressors known to contribute to work-related injuries in the shoulders, elbows, and hands, allowing for a comprehensive evaluation of the overall physical workload.

Validity

As a revised instrument, the UEWD-R (Jacobs, 2016) is expected to possess robust psychometric properties, having undergone refinement from the original UEWD (Opsteegh, 2010). While specific validity coefficients (e.g., criterion validity against objective measures or convergent validity with other established scales) are not detailed in the source description, the revision process typically ensures enhanced content validity relevant to modern occupational settings.

Researchers utilizing the UEWD-R should consult the primary publication by Jacobs NW (2016) to review detailed evidence regarding the scale’s construct validity, ensuring that the two-factor structure accurately represents the theoretical concept of upper extremity demands.

Reliability

The reliability of a short, six-item scale like the UEWD-R is typically assessed via internal consistency (e.g., Cronbach’s Alpha) and test-retest reliability. High internal consistency is essential to confirm that the six items consistently measure the intended construct across the two subscales (Strength/Posture and Repetition).

Given its application in longitudinal occupational studies, high test-retest reliability is also critical, confirming that the measure yields consistent results when administered to the same worker under stable conditions over a short period. Detailed reliability statistics are maintained by the authors (Jacobs NW, 2016) and should be referenced in academic usage.

Factor Analysis

The explicit structure of the UEWD-R, consisting of two subscales (‘Strength/Posture’ and ‘Repetition’), strongly suggests that a factor analytic procedure was employed during its development or revision. This process, likely Confirmatory Factor Analysis (CFA), was necessary to empirically confirm that the six items load onto the hypothesized two underlying factors, thereby supporting the scale’s fundamental construct structure.

The successful identification of these two distinct factors confirms the dimensional structure of the scale, allowing for separate analysis of exertion/postural demands versus repetitive strain demands, which is highly beneficial for targeted ergonomic intervention planning.

Instrument

Test Type: Questionnaire

Format: Short self-report scale (six items)

Language Available: Dutch (Nederlands), English

Population Group: Adults (Volwassenen)

Age Group: Typically 18+ (Adult working population)

Population Details: Applicable to workers engaged in various occupations requiring physical use of the upper extremity. Relevant for individuals with or suspected of having disorders related to the Musculoskeletal System, including bone, joint, cartilage, muscle, and tendon ailments.

Test Methodology: Assesses work demands related to activities, general tasks, and movement/mobility, specifically concerning the upper extremity within the contexts of profession/work and general participation.

Keywords

Ergonomic Assessment, Physical Exposure, Repetitive Strain Injury, Occupational Risk, Job Demands, UEWD, Upper Limb, Psychometric properties.

Authors

Author ORCID Identifier: Not provided in source content.

Affiliation Email addresses: Not provided in source content.

Correspondence Address: Not provided in source content.

Permissions & Fee and Test Year

The UEWD-R was revised and published in 2016 by Jacobs NW. Information regarding specific usage fees and required permissions for commercial or large-scale academic use must be obtained directly from the author or the publishing organization associated with the scale.

Reference’s

Opsteegh L (2010). Original Upper Extremity Work Demands scale (UEWD).

Jacobs NW (2016). Revised Upper Extremity Work Demands scale (UEWD-R) and Dutch version.

The original Explanation Form (Toelichtingsformulier) can be downloaded here: UEWD-R-form.pdf

The Measurement Instrument (Meetinstrument) PDF can be downloaded here: UEWD-R-meetinstr.pdf

Items of the Revised Upper Extremity Work Demands scale

IMPORTANT: The specific textual items of the Revised Upper Extremity Work Demands scale are not provided in the source content. However, the instrument documentation is available via the following link: UEWD-R Measurement Instrument (PDF).