Using Electronic Health Record Data for Occupational Therapy Health Services Research: Invited Commentary.

Health services research (HSR) is a field of study that examines how social factors, financing systems, organizational structures and processes, health technologies, and personal behaviors affect access to health care, the quality and cost of health care, and health and well-being. HSR approaches can help build the occupational therapy evidence base, particularly in relation to population health. Data from electronic health record (EHR) systems provide a rich resource for applying HSR approaches to examine the value of occupational therapy services. Transparency about data preparation procedures is important for interpreting results. Based on our findings, we describe a six-step cleaning protocol for preparing EHR and billing data from an inpatient rehabilitation facility for research and provide recommendations for the field based on our experience. Using and reporting similar strategies across studies will improve efficiency and transparency, and facilitate comparability of results.

Using Electronic Health Record Data for Occupational Therapy Health Services ResearchHealth services research (HSR) focuses on the delivery and outcomes of health care systems. HSR methods are beneficial for examining the value of occupational therapy services, and data collected from practice through electronic health records (EHRs) are an important resource for this work. Although EHRs are now used in most health care settings, extracting and using data for research is a complex, multistep process. We describe a six-step process for preparing data extracted from an EHR for a research study. The data preparation process was iterative and required expertise about how data were recorded, institutional billing and data archiving processes, and Medicare reporting requirements during the study period. We advocate for more occupational therapy researchers to be trained in and apply HSR approaches to continue to build evidence for our services. The profession can capitalize on data that are already being collected in health care settings through EHR systems to evaluate real-world occupational therapy processes and health outcomes.

Interpreting Change in Disorders of Consciousness Using the Coma Recovery Scale-Revised.

The purpose of this study was to differentiate clinically meaningful improvement or deterioration from normal fluctuations in patients with disorders of consciousness (DoC) following severe brain injury. We computed indices of responsiveness for the Coma Recovery Scale-Revised (CRS-R) using data from a clinical trial of 180 participants with DoC. We used CRS-R scores from baseline (enrollment in a clinical trial) and a 4-week follow-up assessment period for these calculations. To improve precision, we transformed ordinal CRS-R total scores (0-23 points) to equal-interval measures on a 0-100 unit scale using Rasch Measurement theory. Using the 0-100 unit total Rasch measures, we calculated distribution-based 0.5 standard deviation (SD) minimal clinically important difference, minimal detectable change using 95% confidence intervals, and conditional minimal detectable change using 95% confidence intervals. The distribution-based minimal clinically important difference evaluates group-level changes, whereas the minimal detectable change values evaluate individual-level changes. The minimal clinically important difference and minimal detectable change are derived using the overall variability across total measures at baseline and 4 weeks. The conditional minimal detectable change is generated for each possible pair of CRS-R Rasch person measures and accounts for variation in standard error across the scale. We applied these indices to determine the proportions of participants who made a change beyond measurement error within each of the two subgroups, based on treatment arm (amantadine hydrochloride or placebo) or categorization of baseline Rasch person measure to states of consciousness (i.e., unresponsive wakefulness syndrome and minimally conscious state). We compared the proportion of participants in each treatment arm who made a change according to the minimal detectable change and determined whether they also changed to another state of consciousness. CRS-R indices of responsiveness (using the 0-100 transformed scale) were as follows: 0.5SD minimal clinically important difference = 9 units, minimal detectable change = 11 units, and the conditional minimal detectable change ranged from 11 to 42 units. For the amantadine and placebo groups, 70% and 58% of participants showed change beyond measurement error using the minimal detectable change, respectively. For the unresponsive wakefulness syndrome and minimally conscious state groups, 54% and 69% of participants changed beyond measurement error using the minimal detectable change, respectively. Among 115 participants (64% of the total sample) who made a change beyond measurement error, 29 participants (25%) did not change state of consciousness. CRS-R indices of responsiveness can support clinicians and researchers in discerning when behavioral changes in patients with DoC exceed measurement error. Notably, the minimal detectable change can support the detection of patients who make a "true" change within or across states of consciousness. Our findings highlight that the continued use of ordinal scores may result in incorrect inferences about the degree and relevance of a change score.

Understanding patients' experiences during transitions from one electronic health record to another: A scoping review.

Objectives: Identify existing research on impacts of transitions between electronic health record (EHR) systems on patients' healthcare experiences. Methods: Scoping review. We searched MedLine, OVID, Embase, CINAHL, and PsycInfo databases for articles on patient experiences with EHR-to-EHR transitions. Results: Three studies met inclusion criteria. All three used validated surveys to compare patient satisfaction with care pre- and post-transition. The surveys did not include specific questions about the EHR transition; one study focused on patient perceptions of provider computer use. Satisfaction levels initially decreased following EHR implementation, then returned to baseline between six and 15 months later in two of three studies. Factors associated with changes in observed satisfaction are unknown. Conclusions: Patient experience has been given limited attention in studies of EHR-to-EHR transitions. Future research should look beyond satisfaction, and examine how an EHR-to-EHR transition can impact the quality of patients' care, including safety, effectiveness, timeliness, efficiency, and equity. Innovation: To our knowledge, this is the first literature review on EHR transitions that specifically focused on patient experiences. In preparation for a transition from one EHR to another, healthcare system leaders should consider the multiple ways patients' experiences with care may be impacted and develop strategies to minimize disruptions in care.

Using Research to Transform Electronic Health Record Modernization: Advancing a VA Partnered Research Agenda to Increase Research Impacts.

BACKGROUND: The U.S. Department of Veterans Affairs (VA) is undergoing an enterprise-wide transition from a homegrown electronic health record (EHR) system to a commercial off-the-shelf product. Because of the far-reaching effects of the EHR transformation through all aspects of the healthcare system, VA Health Services Research and Development identified a need to develop a research agenda that aligned with health system priorities so that work may inform evidence-based improvements in implementation processes and outcomes. OBJECTIVE: The purpose of this paper is to report on the development of a research agenda designed to optimize the EHR transition processes and implementation outcomes in a large, national integrated delivery system. DESIGN: We used a sequential mixed-methods approach (portfolio assessment, literature review) combined with multi-level stakeholder engagement approach that included research, informatics, and healthcare operations experts in EHR transitions in and outside the VA. Data from each stage were integrated iteratively to identify and prioritize key research areas within and across all stakeholder groups. PARTICIPANTS: VA informatics researchers, regional VA health system leaders, national VA program office leaders, and external informatics experts with EHR transition experience. KEY RESULTS: Through three rounds of stakeholder engagement, priority research topics were identified that focused on operations, user experience, patient safety, clinical outcomes, value realization, and informatics innovations. CONCLUSIONS: The resulting EHR-focused research agenda was designed to guide development and conduct of rigorous research evidence aimed at providing actionable results to address the needs of operations partners, clinicians, clinical staff, patients, and other stakeholders. Continued investment in research and evaluation from both research and operations divisions of VA will be critical to executing the research agenda, ensuring its salience and value to the health system and its end users, and ultimately realizing the promise of this EHR transition.

Transitioning from One Electronic Health Record to Another: A Systematic Review.

BACKGROUND: Transitioning to a new electronic health record (EHR) presents different challenges than transitions from paper to electronic records. We synthesized the body of peer-reviewed literature on EHR-to-EHR transitions to evaluate the generalizability of published work and identify knowledge gaps where more evidence is needed. METHODS: We conducted a broad search in PubMed through July 2022 and collected all publications from two prior reviews. Peer-reviewed publications reporting on data from an EHR-to-EHR transition were included. We extracted data on study design, setting, sample size, EHR systems involved, dates of transition and data collection, outcomes reported, and key findings. RESULTS: The 40 included publications were grouped into thematic categories for narrative synthesis: clinical care outcomes (n = 15), provider perspectives (n = 11), data migration (n = 8), patient experience (n = 4), and other topics (n = 5). Many studies described single sites that are early adopters of technology with robust research resources, switching from a homegrown system to a commercial system, and emphasized the dynamic effect of transitioning on important clinical care and other outcomes over time. DISCUSSION: The published literature represents a heterogeneous mix of study designs and outcome measures, and while some of the stronger studies in this review used longitudinal approaches to compare outcomes across more sites, the current literature is primarily descriptive and is not designed to offer recommendations that can guide future EHR transitions. Transitioning from one EHR to another constitutes a major organizational change that requires nearly every person in the organization to change how they do their work. Future research should include human factors as well as diverse methodological approaches such as mixed methods and implementation science.

Exploring the Evolution and Utility of Neuro-Occupation: A Scoping Review.

Neuro-occupation was developed to study the relationship between the nervous system and occupation. Pragmatic implications of neuro-occupation have not been previously summarized. This study aimed to determine how neuro-occupation has been defined, applied across relevant fields, and evolved over time. We performed a scoping review following the Arksey and O'Malley framework. Twenty-five works related to neuro-occupation published between 1997 and 2020 were included. We found that neuro-occupation evolved from utilization primarily in the United States to an international term applied to different clinical populations. Common themes were: (a) the reciprocal relationship between the nervous system and occupations; (b) the Intention, Meaning, and Perception (IMP) model of neuro-occupation; and (c) pragmatic implications for occupational therapy practice and interventions. We suggest an updated definition of neuro-occupation. In addition, we contend that although the term neuro-occupation was developed in response to historical debates in occupational therapy, continued use creates more confusion than clarity.

Understanding Patients' Preferences and Experiences During an Electronic Health Record Transition.

BACKGROUND: The Department of Veterans Affairs (VA) has embarked on the largest system-wide electronic health record (EHR) transition in history. To date, most research on EHR-to-EHR transitions has focused on employee and system transition-related needs, with limited focus on how patients experience transitions. OBJECTIVE: (1) Understand patients' preferences for information and support prior to an EHR transition, and (2) examine actual patient experiences that occurred at facilities that implemented a new EHR. DESIGN: We used a two-step approach. We had discussions with geographically diverse patient advisory groups. Discussions informed semi-structured, qualitative interviews with patients. PARTICIPANTS: Patients affected by the EHR transition. MAIN MEASURES: We met with four patient advisory groups at sites that had not transitioned their EHR. Interviews were conducted with patients who received care at one of two facilities that recently transitioned to the new EHR. KEY RESULTS: Patient advisors identified key areas important to patients during an EHR transition. 1) Use a range of communication strategies to reach diverse populations, especially older, rural patients. 2) Information about the EHR transition should be clear and reinforce trustworthiness. 3) Patients will need guidance using the new patient portal. From the patient interviews, we learned if and how these key areas mapped onto patients' experiences. Patients at the sites that had transitioned learned about the new EHR through a variety of modalities, including letters and banners on the patient portal. However, their experiences varied in terms of information quality, leading to frustrations during and between healthcare encounters. Patient portal issues exacerbated frustrations. These raised concerns about the accuracy and security of the overall EHR. CONCLUSIONS: Maintaining clear communication across patients, local leadership, and providers throughout an EHR transition is essential for successful implementation. Patient-facing communications can set expectations, and help patients receive adequate support, particularly related to the patient portal.

Therapeutic Relationship in mTBI Rehabilitation: The Disparity Between the Illness Experience and Clinical Definitions.

INTRODUCTION: A positive therapeutic relationship is characterized by trust and mutually perceived genuineness. It is positively associated with patients' adherence to treatment, satisfaction, and health outcomes. When service members with a history of mild traumatic brain injury (mTBI) present to rehabilitation clinics with nonspecific symptoms, a disparity between their experience of disability and clinical expectations of mTBI may disrupt the establishment of a positive therapeutic relationship between patients and providers. The objectives of this study are to (1) explore disparities between military service members and rehabilitation clinicians about the clinical diagnosis and illness experience of mTBI and (2) identify barriers to the establishment of a positive therapeutic relationship. MATERIALS AND METHODS: This is a qualitative descriptive study of military service members with prior mTBI (n = 18) and clinicians (n = 16) who participated in interviews and focus groups. Data were analyzed thematically using Kleinman's framing of illness experience and clinical diagnosis. RESULTS: Three themes reflected the potential breakdowns in the therapeutic relationship. The first theme, clinical expectations for post-injury recovery versus patients' experience of ongoing disability, reflects the inconsistency between clinicians' expectations of symptom resolution within 90 days following mTBI and service members' experiences of symptoms that worsened over several months or years. The second theme, symptom attribution to mental health conditions versus tissue injury, describes the difficulty in attributing symptoms to the physical impact of the mTBI or mental health diagnoses that may also stem from the injury event. The third theme, suspected malingering versus valid disability, describes clinicians' reports of frustration with cases in which they suspected malingering for secondary gains in contrast with service members' feelings that their problems were not taken seriously by clinicians. CONCLUSIONS: This study extended previous research on therapeutic relationships by examining the situation of mTBI rehabilitation services for military service members. The findings reinforce the best practice recommendations of acknowledging patients' experiences, addressing the presenting symptoms and problems, and encouraging progressive return to activity following mTBI. Acknowledgment of and attention to patients' illness experience by rehabilitation clinicians is necessary and important for supporting a positive therapeutic relationship and ultimately to optimize patients' health outcomes and reduce disability.

Interventions Facilitating Recovery of Consciousness Following Traumatic Brain Injury: A Systematic Review.

People who experience disorders of consciousness (DoC) following a severe traumatic brain injury (TBI) have complex rehabilitation needs addressed by occupational therapy. To examine the effectiveness of interventions to improve arousal and awareness of people with DoC following a TBI. For this systematic review, we followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. We searched six databases in collaboration with a research librarian. Twenty-seven studies were included and grouped thematically. Multimodal sensory stimulation, familiar voices telling structured stories, and transcranial direct current stimulation had a moderate level of evidence. Multimodal sensory stimulation had the strongest evidence in support of its use in clinical practice. Occupational therapy practitioners should administer multimodal stimuli frequently as studies reported administering these interventions at least twice daily. Occupational therapy practitioners should incorporate personally relevant, meaningful, salient stimuli into interventions when treating patients with DoC.

Provider discussion of health goals and psychosocial needs: Comparing older to younger veteran experience.

OBJECTIVE: To examine by age, the veterans' report on whether components of age-friendly health systems were discussed during primary care visits. DATA SOURCES AND STUDY SETTING: Veterans Affairs (VA) Survey of Healthcare Experience of Patients from October 2015 to September 2019. STUDY DESIGN: Cross-sectional survey of VA users by age group (18-44 years, 45-64 years, 65+ years; N = 1,042,318). We used weighted logistic regression models to evaluate disparities in whether veterans discussed with anyone in their provider's office: health goals, depression symptoms, stress, personal problems, and medications. Models were adjusted for socio-demographic characteristics (sex, socioeconomic status, education, rurality) and comorbidity. DATA COLLECTION/EXTRACTION METHOD: Surveys were administered by mail and online. Additional veteran characteristics were extracted from VA administrative data. PRINCIPAL FINDINGS: In unadjusted analyses, VA users age 18-44 had a higher (-8.2%; CI: -9.0, -7.3) and users aged 45 to 64 had lower (4.0%; CI: 3.7, 4.3) predicted, probably discussing health goals compared to age 65+. Fewer VA users age 65+ reported discussing depression symptoms, personal problems, and stress than other age groups, whereas more VA users age 65+ discussed medications. Results were unchanged after adjusting for socio-demographics and comorbidity. CONCLUSIONS: Delivery of goal-concordant care relies on understanding the needs of individual patients. Lower rates of discussing what matters and mood represent potential missed opportunities to deliver age-friendly care for older veterans.

Association of Cognitive Impairment With Rate of Functional Gain Among Older Adults With Stroke.

OBJECTIVES: This study explored the association between cognitive impairment at admission with self-care and mobility gain rate (amount of change per week) during a post-acute care stay (admission to discharge) for older adults with stroke. DESIGN: Retrospective cohort study. SETTING AND PARTICIPANTS: Four inpatient rehabilitation and 6 skilled nursing facilities. A total of 100 adults with primary diagnosis of stroke; mean age 79 years (SD 7.7); 67% women. METHODS: Retrospective cohort study. We evaluated the extent to which cognitive impairment at admission explained variation in weekly gain rate separately for self-care and mobility. Additional covariates were occupational and physical therapy minutes per day, self-care and mobility function at admission, age, and number of comorbidities. RESULTS: Participants were classified as having severe (n = 16), moderate (n = 39), or mild (n = 45) cognitive impairment at admission. Occupational therapy minutes per day (ß = 0.04; P < .01) and Functional Independence Measure (FIM) self-care function at admission (ß = 0.48; P < .01) were both significantly associated with self-care gain rate (Adjusted R2 = 0.18); cognitive impairment group, age, and number of comorbidities were not significant. Only FIM mobility function at admission (ß = 0.29; P < .001) was significantly associated with mobility gain rate (Adjusted R2 = 0.18); cognitive impairment group, physical therapy minutes, age, and number of comorbidities were not significant. CONCLUSIONS AND IMPLICATIONS: These results provide preliminary evidence that patients with stroke who have severe cognitive impairment may benefit from intensive therapy services as well as less severely impaired patients, particularly occupational therapy for improvement in self-care function.

Mobility Interventions for Patients With Disorders of Consciousness Following a Traumatic Brain Injury (June 2013-October 2020).

Systematic Review Briefs provide a summary of the findings from systematic reviews developed in conjunction with the American Occupational Therapy Association's Evidence-Based Practice Program. Each Systematic Review Brief summarizes the evidence on a theme related to a systematic review topic. This Systematic Review Brief presents findings from the systematic review on the effectiveness of mobility interventions to improve arousal and awareness in people with disorders of consciousness following a traumatic brain injury.

Noninvasive Nerve Stimulation for Patients With Disorders of Consciousness Following a Traumatic Brain Injury (June 2013-October 2020).

Systematic Review Briefs provide a summary of the findings from systematic reviews developed in conjunction with the American Occupational Therapy Association's Evidence-Based Practice Program. Each Systematic Review Brief summarizes the evidence on a theme related to a systematic review topic. This Systematic Review Brief presents findings from the systematic review on the effectiveness of noninvasive nerve stimulation to improve arousal and awareness in people with disorders of consciousness following a traumatic brain injury.

Animal-Assisted Therapy for Patients With Disorders of Consciousness Following a Traumatic Brain Injury (June 2013-October 2020).

Systematic Review Briefs provide a summary of the findings from systematic reviews developed in conjunction with the American Occupational Therapy Association's Evidence-Based Practice Program. Each Systematic Review Brief summarizes the evidence on a theme related to a systematic review topic. This Systematic Review Brief presents findings from the systematic review on the effectiveness of animal-assisted therapy to improve arousal and awareness for people with disorders of consciousness following a traumatic brain injury.

Sensory Stimulation for Patients With Disorders of Consciousness Following a Traumatic Brain Injury (June 2013-October 2020).

Systematic Review Briefs provide a summary of the findings from systematic reviews developed in conjunction with the American Occupational Therapy Association's Evidence-Based Practice Program. Each Systematic Review Brief summarizes the evidence on a theme related to a systematic review topic. This Systematic Review Brief presents findings from the systematic review on the effectiveness of sensory stimulation interventions to improve arousal and awareness in people with disorders of consciousness following a TBI.

Determining the Hierarchy of Coma Recovery Scale-Revised Rating Scale Categories and Alignment with Aspen Consensus Criteria for Patients with Brain Injury: A Rasch Analysis.

This study aimed to empirically evaluate the hierarchical structure of the Coma Recovery Scale-Revised (CRS-R) rating scale categories and their alignment with the Aspen consensus criteria for determining disorders of consciousness (DoC) following a severe brain injury. CRS-R data from 262 patients with DoC following a severe brain injury were analyzed applying the partial credit Rasch Measurement Model. Rasch Analysis produced logit calibrations for each rating scale category. Twenty-eight of the 29 CRS-R rating scale categories were operationalized to the Aspen consensus criteria. We expected the hierarchical order of the calibrations to reflect Aspen consensus criteria. We also examined the association between the CRS-R Rasch person measures (indicative of performance ability) and states of consciousness as determined by the Aspen consensus criteria. Overall, the order of the 29 rating scale category calibrations reflected current literature regarding the continuum of neurobehavioral function: category 6 "Functional Object Use" of the Motor item was hardest for patients to achieve; category 0 "None" of the Oromotor/Verbal item was easiest to achieve. Of the 29 rating scale categories, six were not ordered as expected. Four rating scale categories reflecting the Vegetative State (VS)/Unresponsive Wakefulness Syndrome (UWS) had higher calibrations (reflecting greater neurobehavioral function) than the easiest Minimally Conscious State (MCS) item (category 2 "Fixation" of the Visual item). Two rating scale categories, one reflecting MCS and one not operationalized to the Aspen consensus criteria, had higher calibrations than the easiest eMCS item (category 2 "Functional: Accurate" of the Communication item). CRS-R person measures (indicating amount of neurobehavioral function) and states of consciousness, based on Aspen consensus criteria, showed a strong correlation (rs = 0.86; p < 0.01). Our study provides empirical evidence for revising the diagnostic criteria for MCS to also include category 2 "Localization to Sound" of the Auditory item and for Emerged from Minimally Conscious State (eMCS) to include category 4 "Consistent Movement to Command" of the Auditory item.

Participation Mediates the Relationship Between Postconcussive Symptoms and Suicidal Ideation Among Veterans.

IMPORTANCE: Veterans with mild traumatic brain injury (mTBI) and associated symptoms are at risk for suicide. Postconcussive symptoms (PCS) may heighten risk for suicidal thoughts by limiting veterans' participation. OBJECTIVE: To investigate whether participation mediates the relationship between PCS and suicidal ideation. DESIGN: Cross-sectional, exploratory design. Structural equation models were used to investigate whether participation mediated the relationship between PCS and suicidal ideation. SETTING: Community. PARTICIPANTS: Veterans with mTBI (N = 145). OUTCOMES AND MEASURES: The Ohio State University TBI Identification Method was used to establish mTBI diagnosis. We identified latent variables for PCS and participation using the Neurobehavioral Symptom Inventory and select domains of the Medical Outcomes Study Short Form-36, respectively. We used the Beck Scale for Suicide Ideation to measure the presence of suicidal ideation. RESULTS: Participation mediated the relationship between PCS and the presence of suicidal ideation (odds ratio [OR] = 1.09, p = .011). More severe PCS were associated with lesser participation (ß = -.86, p < .001); greater participation was associated with lower odds of suicidal ideation (OR = 0.92, p = .007). CONCLUSIONS AND RELEVANCE: PCS may heighten risk for suicidal thoughts among veterans by limiting successful participation, a primary target of occupational therapy intervention. Thus, the results suggest that occupational therapy practitioners can play a substantial role in suicide prevention services for veterans with mTBI. Preventive services could mitigate suicide risk among veterans with mTBI by enabling sustained engagement in meaningful and health-promoting activity (e.g., reasons for living) and targeting PCS. What This Article Adds: Researchers have proposed that occupational therapy practitioners can help prevent veteran suicide by supporting their engagement in meaningful, health-promoting activity and by targeting suicide risk factors within their scope of practice. To the best of our knowledge, this is the first study to offer empirical support for such proposed suicide prevention efforts. Although additional research is needed, these results are promising and highlight a distinct role for occupational therapy in suicide prevention.

Health Care Resource Utilization and Costs for Adults With Mild Traumatic Brain Injury With Chronic Vestibular Impairment.

OBJECTIVE: To quantify the economic burden of all-cause health care resource utilization (HCRU) among adults with and without chronic vestibular impairment (CVI) after a mild traumatic brain injury (mTBI). DESIGN: Retrospective matched cohort study. SETTING: IQVIA Integrated Data Warehouse. PARTICIPANTS: People with mTBI+CVI (n=20,441) matched on baseline age, sex, year of mTBI event, and Charlson Comorbidity Index (CCI) score to people with mTBI only (n=20,441) (N=40,882). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: All-cause health HCRU and costs at 12 and 24 months post mTBI diagnosis. RESULTS: People with mTBI+CVI had significantly higher all-cause HCRU and costs at both time points than those with mTBI only. Multivariable regression analysis showed that, when controlling for baseline variables, costs of care were 1.5 times higher for mTBI+CVI than mTBI only. CONCLUSIONS: People who developed CVI after mTBI had greater overall HCRU and costs for up to 2 years after the injury event compared with people who did not develop CVI after controlling for age, sex, region, and CCI score. Further research on access to follow-up services and effectiveness of interventions to address CVI is warranted.

Psychometric Properties and Sex Differences on the Mayo-Portland Adaptability Inventory Participation Subscale (M2PI) in Veterans With Traumatic Brain Injury.

OBJECTIVE: To evaluate the structural validity of the Mayo-Portland Adaptability Inventory Participation Index (M2PI) in a sample of veterans and to assess whether the tool functioned similarly for male and female veterans. DESIGN: Rasch analysis of M2PI records from the National Veterans Traumatic Brain Injury Health Registry database from 2012-2018. SETTING: National VA Polytrauma System of Care outpatient settings. PARTICIPANTS: Veterans with a clinically confirmed history of traumatic brain injury (TBI) (N=6065; 94% male). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: M2PI, a 5-point Likert-type scale with 8 items. For this analysis, the 2 employment items were treated individually for a total of 9 items. RESULTS: The employment items misfit the Rasch Measurement model (paid employment mean square [MnSq]=1.40; other employment MnSq=1.34) and were removed from subsequent iterations. The final model had eigenvalue 1.87 on the first contrast, suggesting unidimensionality of the remaining 7 items. Item order from least to most participation restriction was transportation, self-care, residence management, financial management, initiation, leisure, and social contact. Wright's person separation reliability for nonnormal distributions was 0.93, indicating appropriateness of M2PI for making individual-level treatment decisions. Mean person measure was -0.92±1.34 logits, suggesting that participants did not report restrictions on most items (item mean=0 logits). A total of 3.8% of the sample had the minimum score (no impairment on all items), and 0.2% had the maximum score. Four items had different item calibrations (≥0.25 logits) for female compared with male veterans, but the hierarchy of items was unchanged when the female sample was examined separately. CONCLUSIONS: These findings suggest that, although employment is a poor indicator of participation restrictions among veterans with TBI, the M2PI is unidimensional. Because of subtle differences in scale function between male and female participants, M2PI should be part of a more thorough clinical interview about participation strengths and restrictions.