Brief Abuse Screen for the Elderly (BASE): A Full Guide for Researchers and Clinicians
By ResRef
Published
The Brief Abuse Screen for the Elderly (BASE), a 5-item tool developed by Myrna Reis and Daphne Nahmiash in 1995, was designed precisely for this purpose.
Introduction
Elder abuse, neglect, and exploitation remain under-detected problems that seriously affect the health, safety, and quality of life of older adults. Consequently, brief, practical screening instruments have become essential in both clinical practice and research. The Brief Abuse Screen for the Elderly (BASE), a 5-item tool developed by Myrna Reis and Daphne Nahmiash in 1995, was designed precisely for this purpose. First published in The Gerontologist as part of an intervention model, the BASE has been cited in more than 80 scientific works and continues to support early identification of abuse risk.
This article examines the BASE’s core features, practical applications, and clinical value. In addition, it offers researchers and clinicians clear guidance for using the instrument to improve assessment and care in geriatrics, family medicine, nursing, and social work settings.
Key Features of the Brief Abuse Screen for the Elderly (BASE)
Purpose and Use
The primary purpose of the BASE is to help intake workers and healthcare professionals rapidly gauge the likelihood of elder abuse, neglect, or exploitation during initial contact. By focusing on role classification, suspicion level, type of abuse, and intervention urgency, the BASE enables early case identification and timely response. Ultimately, this supports more targeted interventions and better protection of vulnerable older adults.
Target Population
The BASE is validated for use with adults aged 60 years and older, including:
Older adults (45–64 years)Older people (65+ years)It is specifically designed for clients who are either care-recipients or caregivers and who present in health or social service settings.
Structure
The BASE comprises exactly 5 questions designed for rapid administration:
Questions 1 and 2: Establish the client's role by determining if the person is an elderly care-recipient or an elderly caregiver.Question 3: Assesses the clinician's level of suspicion on a 5-point Likert scale (ranging from 1 = "not at all" to 5 = "very much"). It also distinguishes whether the suspected abuse originates from the caregiver, the care-recipient, or another individual.Question 4: Activates only when suspicion exists (a rating of 2 to 5 on Question 3). The clinician checks one or more of five specific categories: physical, psychosocial, financial, neglect (active or passive), and sexual abuse.Question 5: Determines the urgency of intervention, providing options ranging from immediate action to within 24 hours, 24–72 hours, one week, or two weeks or moreScoring Method
Unlike standard psychometric tests, the BASE employs a qualitative screening approach rather than calculating a cumulative numerical total.
Positive Screen: A screen is considered positive if the response to Question 3 (suspicion of abuse) is rated 2 or higher.Follow-up Protocol: Once a screen yields a positive result, the clinician must complete Question 4 to classify the suspected abuse types and complete Question 5 to rate the required urgency of intervention.Cut-off Scores: Traditional numerical cut-off scores are not applicable because decisions stem directly from the qualitative suspicion rating.Administration Format
The BASE is a brief clinician-completed form that can be administered via
paper-based formatsIt typically takes less than 5 minutes to complete, making it highly practical for busy intake and clinical settings.
Applications of the Brief Abuse Screen for the Elderly (BASE)
The BASE has clear applications in both clinical and research domains:
Screening: It serves as an effective first-line tool to identify individuals who may be experiencing or at risk of elder abuse.Monitoring: Clinicians can track changes in suspicion level and urgency across successive contacts.Research: The BASE functions as a practical outcome or classification measure in studies of elder mistreatment prevalence, risk factors, and intervention effectiveness.Languages and availability
The BASE is currently available in:
EnglishThis availability supports its use in English-speaking clinical and research environments
Reliability and Validity
The BASE is classified as a highly reliable and valid instrument. Psychometric evaluation demonstrates strong internal consistency, supported by a reported Cronbach's alpha of 0.91. This high statistical reliability ensures that the tool consistently captures indicators of elder mistreatment across clinical evaluations.
The original validation study Linkvalidation of a three-dimensional model for the identification of abuse in older adults LinkLimitations and Considerations
Despite its strengths, the BASE has a few limitations:
Self-report: Respondents may be influenced by social desirability bias or personal interpretation.Cultural Bias: Potential for cultural bias exists, which may affect response interpretation across diverse populations.Language Barriers: Available primarily in English, which may restrict usage in non-English speaking clinical environments.Limited Validation Studies: Fewer large-scale validation studies exist compared to general psychiatric scales.Narrow Focus: Focuses specifically on elder abuse identification rather than comprehensive psychiatric or functional status.Age Restrictions: Designed specifically for older adults aged 60 and above, making it unsuitable for younger populations.Social Desirability Bias: Informants or clients may underreport mistreatment due to fear or social pressure.Other Versions And Related Questionnaires
No shortened or expanded official versions of the BASE itself are currently in widespread use.
However, the BASE is often employed alongside complementary instruments developed by the same authors or related tools, including:
Caregiver Abuse Screen (CASE)Hwalek-Sengstock Elder Abuse Screening Test (H-S/EAST)Elder Abuse Suspicion Index (EASI)Additional Resources
The original validation study LinkYou can access the questionnaire as a PDF through this linkFor inquiries, contact Daphne Nahmiash Daphne.Nahmiash@svs.ulaval.ca or the publisher Captus Press lily@captus.comFrequently Asked Questions (FAQ)
Who can use the BASE?Clinicians, researchers, intake workers, and healthcare providers can use the BASE for adult clients aged 60 years and older who are care-recipients or caregivers.
How long does it take to complete the BASE?Trained professionals typically complete the BASE in less than 5 minutes, making it highly feasible for use in clinical and research settings.
How is the BASE administered?Healthcare teams administer the questionnaire primarily via paper-based formats during in-person contact, offering simplicity in various care environments.
Is there any cost to using the BASE?The BASE generally requires permission for use. It is proprietary; interested parties should seek formal permission from the original authors or publisher for clinical, research, or commercial applications.
A Word From ResRef about the Brief Abuse Screen for the Elderly (BASE)
The Brief Abuse Screen for the Elderly (BASE) was developed by Myrna Reis and Daphne Nahmiash and published in 1995. It is a rapid screening tool consisting of 5 questions designed for adults aged 60 years and older. It helps intake workers and healthcare professionals quickly gauge the likelihood of elder abuse, neglect, or exploitation during initial contact.
References
Reis, M. & Nahmiash, D.. (1995). When seniors are abused: an intervention model. The Gerontologist, 35(5), 666-671. LinkCohen, M.. (2013). The process of validation of a three-dimensional model for the identification of abuse in older adults. Archives Of Gerontology And Geriatrics, 57(3), 243-249. Link