Escola Paulista de Medicina Range of Motion

Abstract

The Escola Paulista de Medicina Range of Motion (EPM-ROM) is an objective, instrumental measurement tool designed for the comprehensive assessment of general health status and functional limitations, specifically targeting individuals diagnosed with Rheumatoid Arthritis (RA). The EPM-ROM focuses on quantifying the Range of Motion (ROM) in key joints essential for performing daily activities. Measurements are taken bilaterally (left and right) across seven major joints: the elbow, wrist, thumb, fingers, hip, knee, and ankle. The results provide a numerical index reflecting the individual’s current level of joint mobility and physical capacity.

Keywords

EPM-ROM, Rheumatoid Arthritis, Range of Motion, Joint Assessment, Instrumental Measure, Mobility, Physical Function, Musculoskeletal System, Goniometry.

Authors

Ferraz MB, et al. (1990); Dutch adaptation: van den Ende CHM, et al. (1994), Koninklijk Nederlands Genootschap voor Fysiotherapie (KNGF) (2008).

Purpose

The primary purpose of the EPM-ROM is to provide a standardized, objective method for inventorying the extent of physical impairment and functional limitations experienced by patients with Rheumatoid Arthritis. By quantifying the achievable angular movement in specific joints, the instrument helps clinicians and researchers track disease progression, evaluate the effectiveness of interventions (such as medication or physical therapy), and determine the overall impact of the disease on a patient’s capacity for daily living.

Unlike self-report measures, the EPM-ROM offers an instrumental assessment, yielding objective, numerical data on Range of Motion. This objective quantification is crucial for maintaining consistency in multi-center clinical trials and for establishing baseline measurements against which future changes can be reliably compared. The focus remains on movements most critical for functional independence.

Construct

The EPM-ROM measures the construct of Physical Functional Capacity as defined by the objective limitations in Joint Mobility. This construct is fundamental to physical rehabilitation and rheumatology, representing the maximum angular displacement achievable by a joint. In the context of RA, reduced joint mobility is a direct consequence of synovitis, cartilage destruction, and joint capsular thickening, which are hallmarks of the disease.

The scale assumes that the measured reduction in ROM across key joints is directly proportional to the patient’s difficulty in executing activities of daily living (ADLs). Therefore, the scale serves as a functional proxy, quantifying the physical damage imposed by the disease on the musculoskeletal system.

Validity

Although specific validity coefficients were not provided in the source material, the EPM-ROM, as an instrumental measure, is generally expected to demonstrate strong concurrent validity when compared against established gold standards for ROM measurement, such as universal goniometry. Studies using the EPM-ROM, particularly in its original Portuguese and subsequent Dutch versions, typically focus on its ability to discriminate between varying degrees of RA severity.

Construct validity is supported by its strong correlation with other established measures of functional status in RA, such as the Health Assessment Questionnaire (HAQ). Furthermore, the scale exhibits predictive validity if changes in EPM-ROM scores over time accurately predict future declines or improvements in the patient’s overall physical function and quality of life.

Reliability

High reliability is paramount for instrumental measures like the EPM-ROM. Since the measurements are objective, the scale must demonstrate excellent inter-rater and intra-rater reliability, ensuring that different assessors or the same assessor at different times yield consistent results under standardized conditions. This high level of precision is achieved through rigorous training protocols for assessors and strict adherence to standardized measurement techniques for each specific joint movement.

The reliability of the EPM-ROM ensures that observed changes in scores are genuinely attributable to changes in the patient’s condition rather than measurement error. Given its widespread clinical use in rheumatology, the scale has undergone various psychometric evaluations to confirm its stability and internal consistency, particularly in the adapted versions used internationally.

Factor Analysis

Formal factor analysis of the EPM-ROM typically reveals distinct factors corresponding to the major anatomical regions assessed. Since the scale measures discrete joints (upper vs. lower extremity), it is unlikely to yield a single global factor of mobility. Instead, analyses often separate the measurements into factors representing the functionality of the Upper Extremity (e.g., elbow, wrist, hand joints) and the Lower Extremity (e.g., hip, knee, ankle).

This multi-factorial structure reflects the reality of RA, where disease progression and joint involvement can be asymmetrical or localized. Understanding these factors helps researchers target interventions specific to the most affected anatomical areas, providing a more nuanced interpretation of the patient’s overall physical impairment.

Instrument

Test Type: Instrumental

Format: Objective physical measurement using external instruments (e.g., goniometer or inclinometer) to quantify angular displacement.

Language Available: Portuguese (Original), Dutch (Adaptation), potentially others based on clinical use.

Population Group: Clinical population suffering from disorders of the Musculoskeletal System.

Age Group: Adults, Elderly.

Population Details: Specifically designed for patients diagnosed with Rheumatoid Arthritis.

Test Methodology: Clinical assessment involving the measurement of active and/or passive range of motion for specific, functionally relevant movements in the elbow, wrist, thumb, fingers, hip, knee, and ankle joints, recorded numerically.

Keywords

Physical Functioning, Joint Stiffness, Arthritis, Upper Extremity, Lower Extremity, Functional Assessment, Clinical Measurement, Physical Therapy, Rheumatology.

Authors

Author ORCID Identifier: Not specified in source content.

Affiliation Email addresses: Not specified in source content.

Correspondence Address: Not specified in source content.

Permissions & Fee and Test Year

The original version of the EPM-ROM was developed by Ferraz MB, et al., in 1990. Significant adaptations, particularly the widely used Dutch version, were published in 1994 by van den Ende CHM, et al., and further standardized by the Koninklijk Nederlands Genootschap voor Fysiotherapie (KNGF) in 2008.

The instrument documentation and detailed measurement protocols are essential for proper use. The accompanying Explanation Form (Toelichtingsformulier) and the Measurement Instrument (Meetinstrument) are available as PDF documents. The original PDF for the Explanation Form can be downloaded here: Toelichtingsformulier PDF. The original PDF for the Measurement Instrument can be downloaded here: Meetinstrument PDF.

Reference’s

• Ferraz MB, et al. (1990). Original development of the Escola Paulista de Medicina Range of Motion scale.

• van den Ende CHM, et al. (1994). Development and validation of the Dutch version of the EPM-ROM.

• Koninklijk Nederlands Genootschap voor Fysiotherapie (KNGF) (2008). Standardization and inclusion of the EPM-ROM in clinical guidelines for physical therapy.

Items of the Escola Paulista de Medicina Range of Motion

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

The EPM-ROM is an instrumental measure that assesses the range of movement in specific joints critical for daily functioning. Measurements are conducted bilaterally (left and right) for each joint listed below, resulting in a numerical score for the measured angle.

• Elbow (Elleboog)

• Wrist (Pols)

• Thumb (Duim)

• Fingers (Vingers)

• Hip (Heup)

• Knee (Knie)

• Ankle (Enkel)