In search of an integrative measure of functioning

Assessment of activities and participation of people by rehabilitation-focused clinical registries: a systematic scoping review

INTRODUCTION

Rehabilitation is considered a key intervention in health care. Clinical registries, defined as an organized system that uses observational methods to collect information to assess specific outcomes in a defined population, can contribute to assessing the impact of the rehabilitation intervention. This review aims to identify and describe rehabilitation-specific registry systems with an emphasis on identifying outcomes that enable the assessment of vital areas and activities of daily living.

EVIDENCE ACQUISITION

A systematic scoping review was conducted. A systematic search was conducted up to August 2022 in MEDLINE/PubMed, Embase, Cochrane Library, Epistemonikos, and other search resources. Studies related to rehabilitation registries presented data on people with health problems that could limit their functioning were selected. The inclusion of studies/clinical registries was not limited by methodological design, year of publication, country, or language. The unit of analysis was rehabilitation registries. The measurement instruments used to assess the outcomes were explored to estimate the domain assessed from the vital areas related to functioning and disability as described by the International Classification of Functioning, Disability and Health (ICF). The vital areas were classified according to activities of daily living (ADLs).

EVIDENCE SYNTHESIS

Seventy-one registries in rehabilitation were identified. The registries included a median of 3 (IQR 2-5) assessment instruments designed to assess the impact of different rehabilitation programs. In total, 137 different assessment scales or instruments were identified. Each rehabilitation registry assessed 6 (IQR 2-8) domains of the ICF, and 15.4% of registries assessed all domains. The most assessed domain was "Mobility" (89.7%), and the least assessed was "General Tasks and Demands" (25.6%). In addition, 92.3% of rehabilitation registries assessed basic ADLs, 76.9% advanced ADLs, and 71.8% instrumental ADLs.

CONCLUSIONS

Although clinical registries do not claim to directly assess the impact of rehabilitation programs on people's functioning according to the ICF framework, it was identified that a low percentage of them assessed the nine vital areas through different outcome assessment instruments. However, most rehabilitation registries directly or indirectly assess some basic, instrumental, and advanced ADLs. The findings of this review highlight the need to improve the design of clinical registries focused on assessing the impact of rehabilitation programs to assess people in all areas of their lives.

My assistive technology outcomes framework: rights-based outcome tools for consumers to 'measure what matters'

AT outcomes research is the systematic investigation of changes produced by AT in the lives of AT users and their environments. In contrast to focal outcome measures, My Assistive Technology Outcomes Framework (MyATOF) envisions an alternative starting point, co-designing a holistic and evidence-based set of outcome dimensions enabling AT users to quantify their own outcomes. International classification systems, research evidence, regulatory and service delivery frameworks underpin six optional tools: supports, outcomes, costs, rights, service delivery pathway and customer experience. Designed to empower the consumer-as-researcher and self-advocate, MyATOF has the potential to fill an identified gap in policy-relevant, consumer-focussed and consumer-directed outcome measurement in Australia and internationally. This paper presents the need for consumer-focussed measurement and articulates the conceptual foundations of MyATOF. The iterative development and results of MyATOF use-cases collected to date are presented. The paper concludes with next steps in using the Framework internationally, as well as its future development.

Developing self-report disability questions for a voluntary patient registration form for general practice in Australia

OBJECTIVE

This article reports on research undertaken to develop self-report disability questions for a patient registration form that may be implemented in general practices across Australia as part of a voluntary patient registration program.

METHODS

There were four research components: rapid review of approaches for capturing disability information; expert informant interviews (n=19); stakeholder consultation via virtual focus groups (n=65); and online survey (n=35). Findings from each component informed development of materials for subsequent components in an iterative research process.

RESULTS

Three disability questions were developed: two alternative questions for identifying disability, conceptually aligned with the operational definition of disability in Australia's national disability survey; one question to determine the patient's disability group/s.

CONCLUSIONS

Knowledge and perspectives from a variety of sources informed the development of self-report questions to identify patients with disability. Implementing these questions represents an opportunity to test new ways of capturing disability information suited to mainstream service provision contexts. It will be essential to evaluate the quality of the data produced during the initial period of implementation.

IMPLICATIONS FOR PUBLIC HEALTH

The collection of self-report patient disability information within general practice, using standard and conceptually-sound questions, has the potential to support improved provision of health care to patients with disability.

Toward a paradigm shift in healthcare: using the International Classification of Functioning, Disability and Health (ICF) and the capability approach (CA) jointly in theory and practice

PURPOSE

Over the past two decades, healthcare systems have shifted to adopt a more holistic, patient-centered care system. However, operationalization in practice remains challenging. Two frameworks have contributed substantially to the transformation toward more holistic and patient-centered care: the International Classification of Functioning, Disability and Health (ICF) and the capability approach (CA). Using these frameworks jointly can contribute to improved patient-centered care in clinical practice.

METHODS

This article explores the strengths and weaknesses of the use of the two frameworks in care and investigates whether using them jointly might contribute to more appropriate and patient-centered care. We will present a practical example of this integration in the form of a novel e-health application.

RESULTS

The exploration indicated that if the frameworks are used jointly, the individual weaknesses can be overcome. The application, used to exemplify the joint use of the frameworks, contains all categories of the ICF. It offers a unique tool that allows a person to self-assess, record, and evaluate their functioning and capabilities and formulate related goals.

CONCLUSIONS

Using the ICF jointly with the CA can foster holistic, patient-centered care. The e-health application provides a concrete example of how the frameworks can be used jointly. Implications for rehabilitationUsing the International Classification of Functioning, Disability and Health jointly with the capability approach can foster holistic, patient-centered care.The joint use of the frameworks is demonstrated by an e-health application which enables users to evaluate their functioning in relation to their own goals, provides them with the opportunity to increase control over their health and have a more active role in their care.Tools to record both functioning and goals from a patient's perspective can support professionals in offering patient-centered care in daily practice.Individual recording, monitoring and evaluation of functioning, capabilities and goals regarding functioning can provide a basis for research and quality improvement.

BigMove: A Group Intervention for People with Physical and Mental Health Conditions

Introduction:

This article describes an innovative, integrated care intervention, called BigMove, which aims to improve the functioning, capabilities and quality of life of people with a combination of physical and mental health conditions.

Description:

Theoretical frameworks reflected in the intervention are the Capability Approach (CA) and Self-Determination Theory (SDT). Essential elements of the intervention included to expand participants’ behavioural repertoire are motivational interviewing; functional goal setting (using the International Classification of Functioning, Disability and Health (ICF); cognitive behavioural therapy; enjoyment; support of the group; and physical activity. The design combines individual sessions and group sessions.

Discussion:

By integrating the CA and the SDT, the intervention enables participants to make self-directed and value-driven choices in life and change their behaviour accordingly to strengthen their functioning and capabilities. To foster person-centred, integrated care, it is crucial to reform the interaction between professionals and patients and to re-structure the organisation and financing of care to enable the provision of complex integrated care interventions.

Conclusion:

For people with physical and mental health conditions, the intervention BigMove provides an innovative integrated care approach that addresses aspirations people have regarding their functioning and focuses on individual goal setting and behaviour change.

Combining Child Functioning Data with Learning and Support Needs Data to Create Disability-Identification Algorithms in Fiji's Education Management Information System

Disability disaggregation of Fiji’s Education Management Information System (FEMIS) is required to determine eligibility for inclusive education grants. Data from the UNICEF/Washington Group Child Functioning Module (CFM) alone is not accurate enough to identify disabilities for this purpose. This study explores whether combining activity and participation data from the CFM with data on environmental factors specific to learning and support needs (LSN) more accurately identifies children with disabilities. A survey on questions related to children’s LSN (personal assistance, adaptations to learning, or assessment and assistive technology) was administered to teachers within a broader diagnostic accuracy study. Descriptive statistics and correlations were used to analyze relationships between functioning and LSN. While CFM data are useful in distinguishing between disability domains, LSN data are useful in strengthening the accuracy of disability severity data and, crucially, in identifying which children have disability amongst those reported as having some difficulty on the CFM. Combining activity and participation data from the CFM with environmental factors data through algorithms may increase the accuracy of domain-specific disability identification. Amongst children reported as having some difficulty on the CFM, those with disabilities are effectively identified through the addition of LSN data.

Health-related quality of life in coronary heart disease: a systematic review and meta-analysis mapped against the International Classification of Functioning, Disability and Health

BACKGROUND

Health-related quality of life (HRQoL) is an important outcome in coronary heart disease (CHD). However, variability in HRQoL indicators suggests a need to consider domain coverage. This review applies a globally accepted framework, the International Classification of Functioning, Disability and Health (ICF), to map HRQoL measures that are reliable and valid among people with CHD.

METHODS

The Embase, Pubmed and PsycInfo databases were searched, with 10 observational studies comparing HRQOL among 4786 adults with CHD to 50949 controls identified. Study reporting quality was examined (QualSyst). Hedges' g statistic (with 95% CIs and p values) was used to measure the effect size for the difference between group means (≤ 0.2 small, ≤ 0.5 medium, ≤ 0.80 large difference), and between-study heterogeneity (tau, I2 test) examined using a random effects model.

RESULTS

Adults with CHD reported lowered HRQoL (gw = - 0.418, p < 0.001). Adjusted mean differences in HRQoL ratings, controlling for socio-demographics, were smaller but remained significant. Large group differences were associated with individual measures of activity and participation (WHOQOL g = - 1.199, p < 0.001) and self-perceived health (SF 36 g = - 0.616, p < 0.001).

CONCLUSIONS

The ICF provides a framework for evaluating and understanding the impact of CHD on HRQoL. The results demonstrate that HRQoL goes beyond physical symptoms, with activity limitations, social support and participation, and personal perceptions identified as key ICF domains in CHD assessment. Further investigations are needed to unravel the dynamic and inter-relationships between these domains, including longitudinal trends in HRQoL indicators.

Identifying psychosocial difficulties of inpatients with substance use disorders: evaluation of the usefulness of the PARADISE24 for clinical practise

Purpose: Improvements in overall functioning and well-being are important goals in the treatment of substance use disorders. The aim of the current study was to evaluate the usefulness of the PARADISE24 instrument for studying the scope and severity of psychosocial difficulties by comparing the results with other measures in the context of substance use disorders.Materials and methods: This cross-sectional study included two independent inpatient samples. The first sample consisted of 80 interviews including the PARADISE24 and 10 other measures. The second sample consisted of the responses of 1082 inpatients to a self-administered PARADISE24 questionnaire.Results: Inpatients with substance use disorders had experienced a wide range of psychosocial difficulties and the two samples produced similar results. Highest scores were observed for emotional difficulties. The PARADISE24 showed convergent validity with measures of disability and depressive symptoms and discriminant validity with personality traits and environmental factors (i.e., social support and caretaker's empathy). Psychosocial difficulties were inversely associated with quality of life and self-assessed health.Conclusion: The PARADISE24 provides a wide range of useful information on psychosocial difficulties for clinical work and it can be used as a self-administered questionnaire in the evaluation and treatment of substance use disorders.Implications for rehabilitationIndividuals undergoing inpatient treatment for substance use disorders experience various and severe psychosocial difficulties.The PARADISE24 is an evidence-based instrument for assessing the scope and severity of 24 common psychosocial difficulties among neurological and psychiatric disorders.The PARADISE24 also offers a time-efficient method which can be used as a self-administered questionnaire in the context of substance use disorders.Comparison between the PARADISE24 and 10 commonly used measures showed that the PARADISE24 covered a wide variety of clinically relevant issues in one questionnaire.

Predicting excess cost for older inpatients with clinical complexity: A retrospective cohort study examining cognition, comorbidities and complications

BACKGROUND

Hospital-acquired complications increase length of stay and contribute to poorer patient outcomes. Older adults are known to be at risk for four key hospital-acquired complications (pressure injuries, pneumonia, urinary tract infections and delirium). These complications have been identified as sensitive to nursing characteristics such as staffing levels and level of education. The cost of these complications compared to the cost of admission severity, dementia, other comorbidities or age has not been established.

METHOD

To investigate costs associated with nurse-sensitive hospital-acquired complications in an older patient population 157,178 overnight public hospital episodes for all patients over age 50 from one Australian state, 2006/07 were examined. A retrospective cohort study design with linear regression analysis provided modelling of length-of-stay costs. Explanatory variables included patient age, sex, comorbidities, admission severity, dementia status, surgical status and four complications. Extra costs were based on above-average length-of-stay for each patient's Diagnosis Related Group from hospital discharge data.

RESULTS

For adults over 50 who have length of stay longer than average for their diagnostic condition, comorbid dementia predicts an extra cost of A$874, (US$1,247); any one of four key complications predicts A$812 (US$1,159); each increase in admission severity score predicts A$295 ($US421); each additional comorbidity predicts A$259 (US$370), and for each year of age above 50 predicts A$20 (US$29) (all estimates significant at p<0.0001).

DISCUSSION

Hospital-acquired complications and dementia cost more than other kinds of inpatient complexity, but admission severity is a better predictor of excess cost. Because complications are potentially preventable and dementia care in hospitals can be improved, risk-reduction strategies for common complications, particularly for patients with dementia could be cost effective.

CONCLUSIONS

Complications and dementia were found to cost more than other kinds of inpatient complexity.

The ICF has made a difference to functioning and disability measurement and statistics

AIMS

Fifteen years after the publication of the International Classification of Functioning, Disability and Health (ICF), we investigated: How ICF applications align with ICF aims, contents and principles, and how the ICF has been used to improve measurement of functioning and related statistics.

METHODS

In a scoping review, we investigated research published 2001-2015 relating to measurement and statistics for evidence of: a change in thinking; alignment of applications with ICF specifications and philosophy; and the emergence of new knowledge.

RESULTS

The ICF is used in diverse applications, settings and countries, with processes largely aligned with the ICF and intended to improve measurement and statistics: new national surveys, information systems and ICF-based instruments; and international efforts to improve disability data. Knowledge is growing about the components and interactions of the ICF model, the diverse effects of the environment on functioning, and the meaning and measurement of participation.

CONCLUSION

The ICF provides specificity and a common language in the complex world of functioning and disability and is stimulating new thinking, new applications in measurement and statistics, and the assembling of new knowledge. Nevertheless, the field needs to mature. Identified gaps suggest ways to improve measurement and statistics to underpin policies, services and outcomes. Implications for Rehabilitation The ICF offers a conceptualization of functioning and disability that can underpin assessment and documentation in rehabilitation, with a growing body of experience to draw on for guidance. Experience with the ICF reminds practitioners to consider all the domains of participation, the effect of the environment on participation and the importance of involving clients/patients in assessment and service planning. Understanding the variability of functioning within everyday environments and designing interventions for removing barriers in various environments is a vital part of rehabilitation planning.

Use of a New International Classification of Health Interventions for Capturing Information on Health Interventions Relevant to People with Disabilities

Development of the World Health Organization’s International Classification of Health Interventions (ICHI) is currently underway. Once finalised, ICHI will provide a standard basis for collecting, aggregating, analysing, and comparing data on health interventions across all sectors of the health system. In this paper, we introduce the classification, describing its underlying tri-axial structure, organisation and content. We then discuss the potential value of ICHI for capturing information on met and unmet need for health interventions relevant to people with a disability, with a particular focus on interventions to support functioning and health promotion interventions. Early experiences of use of the Swedish National Classification of Social Care Interventions and Activities, which is based closely on ICHI, illustrate the value of a standard classification to support practice and collect statistical data. Testing of the ICHI beta version in a wide range of countries and contexts is now needed so that improvements can be made before it is finalised. Input from those with an interest in the health of people with disabilities and health promotion more broadly is welcomed.

The measurement of functioning using the International Classification of Functioning, Disability and Health: comparing qualifier ratings with existing health status instruments

BACKGROUND

The International Classification of Functioning, Disability and Health is the international standard for describing and monitoring functioning. While the categories, the units of the classification, were not designed with measurement in mind, the hierarchical structure of the classification lends itself to the possibility of summating categories into some higher order domain. Focusing on the chapters of d4 Mobility, d5 Self-Care and d6 Domestic Life, this study seeks to ascertain if qualifiers rating of categories (0-No problem to 4-Complete problem) within those chapters can be summated, and whether such derived measurement is consistent with estimates obtained from well-known instruments which purport to measure the same constructs.

METHODS

The current study applies secondary analysis to data previously collected in the context of validating Core Sets for stroke, rheumatoid arthritis, and osteoarthritis. Data included qualifier-based ratings of the categories in the Core Sets, and the physical functioning sub-scale of the Short-Form 36, and the World Health Organization Disability Assessment Schedule 2.0. To examine qualifier-comparator scale item agreement Kappa statistics were used. To identify whether appropriate gradients of the comparator scales were observed across qualifier levels, an Independent Sample Median Test of the ordinal scores was deployed. To investigate the internal validity of the summated ICF categories, the Rasch model was applied.

RESULTS

Data from 2,927 subjects from Europe, Australasia, Middle East and South America were available for analysis; 36.3% had experienced a stroke, 35.8% osteoarthritis, and 27.9% had rheumatoid arthritis. The items from the Short-Form 36 could not match directly the qualifier categories as the former had only 3 response options. The Kappa between World Health Organization Disability Assessment Schedule 2.0 items and categories was low. For all qualifiers, a significant (<0.001) overall gradient was observed across the comparator scales. Only in few of the World Health Organization Disability Assessment Schedule 2.0 items could no discrete level be detected. The aggregation of the qualifiers at the Chapter and higher order levels mostly revealed fit to the Rasch model. Almost all ICF qualifiers showed ordered thresholds suggesting that the current structure and response options of the qualifiers worked as intended.

CONCLUSIONS

The findings of this study provide supporting evidence for the use of the professionally rated categories and associated qualifiers to measure functioning. Implication for Rehabilitation This study provides evidence that functioning data can be collected directly with the International Classification of Functioning, Disability and Health (ICF) by using the ICF categories as items and the ICF qualifiers as rating scale. The findings of this study show the aggregated ratings of ICF categories from the chapters d4 Mobility, d5 Self-care, and d6 Domestic life capture a broader spectrum of the construct than the corresponding summated items from the SF36-Physical Function sub-scale and the corresponding items of the World Health Organization Disability Assessment Schedule 2.0. This study illustrates the potential of building quantitative measurement by aggregating ICF categories and their qualifier ratings into meaningful domains.

Research Recommendations for Improving Measurement of Treatment Effectiveness in Depression

Background: Despite the steadily escalating psychological and economic burden of depression, there is a lack of evidence for the effectiveness of available interventions on functioning areas beyond symptomatology. Therefore, the main objective of this study was to give an insight into the current measurement of treatment effectiveness in depression and to provide recommendations for its improvement.

Materials and Methods: The study was based on a multi-informant approach, comparing data from a systematic literature review, an expert survey with representatives from clinical practice (130), and qualitative interviews with patients (11) experiencing depression.

Results: Current literature places emphasis on symptomatic outcomes and neglects other domains of functioning, whereas clinicians and depressed patients highlight the importance of both. Interpersonal relationships, recreation and daily activities, communication, social participation, work difficulties were identified as being crucial for recovery. Personal factors, neglected by the literature, such as self-efficacy were introduced by experts and patients. Furthermore, clinicians and patients identified a number of differences regarding the areas improved by psychotherapeutic or pharmacological interventions that were not addressed by the pertinent literature.

Conclusion: Creation of a new cross-nationally applicable measure of psychosocial functioning, broader remission criteria, report of domain-specific information, and a personalized approach in treatment decision-making are the first crucial steps needed for the improvement of the measurement of treatment effectiveness in depression. A better measurement will facilitate the clinical decision making and answer the escalating burden of depression.

The efficacy of psychotherapy, pharmacotherapy and their combination on functioning and quality of life in depression: a meta-analysis

BACKGROUND

There is growing recognition of the importance of both functioning and quality of life (QoL) outcomes in the treatment of depressive disorders, but the meta-analytic evidence is scarce. The objective of this meta-analysis of randomized controlled trials (RCTs) was to determine the absolute and relative effects of psychotherapy, pharmacotherapy and their combination on functioning and QoL in patients with depression.

METHOD

One hundred and fifty-three outcome trials involving 29 879 participants with depressive disorders were identified through database searches in Pubmed, PsycINFO and the Cochrane Central Register of Controlled Trials.

RESULTS

Compared to control conditions, psychotherapy and pharmacotherapy yielded small to moderate effect sizes for functioning and QoL, ranging from g = 0.31 to g = 0.43. When compared directly, initial analysis yielded no evidence that one of them was superior. After adjusting for publication bias, psychotherapy was more efficacious than pharmacotherapy (g = 0.21) for QoL. The combination of psychotherapy and medication performed significantly better for both outcomes compared to each treatment alone yielding small effect sizes (g = 0.32 to g = 0.39). Both interventions improved depression symptom severity more than functioning and QoL.

CONCLUSION

Despite the small number of comparative trials for some of the analyses, this study reveals that combined treatment is superior, but psychotherapy and pharmacotherapy alone are also efficacious for improving functioning and QoL. The overall relatively modest effects suggest that future tailoring of therapies could be warranted to better meet the needs of individuals with functioning and QoL problems.

Reconsideration of the scheme of the international classification of functioning, disability and health: incentives from the Netherlands for a global debate

PURPOSE

The ICF (International Classification of Functioning, Disability and Health) framework (used worldwide to describe 'functioning' and 'disability'), including the ICF scheme (visualization of functioning as result of interaction with health condition and contextual factors), needs reconsideration. The purpose of this article is to discuss alternative ICF schemes.

METHOD

Reconsideration of ICF via literature review and discussions with 23 Dutch ICF experts. Twenty-six experts were invited to rank the three resulting alternative schemes.

RESULTS

The literature review provided five themes: 1) societal developments; 2) health and research influences; 3) conceptualization of health; 4) models/frameworks of health and disability; and 5) ICF-criticism (e.g. position of 'health condition' at the top and role of 'contextual factors'). Experts concluded that the ICF scheme gives the impression that the medical perspective is dominant instead of the biopsychosocial perspective. Three alternative ICF schemes were ranked by 16 (62%) experts, resulting in one preferred scheme.

CONCLUSIONS

There is a need for a new ICF scheme, better reflecting the ICF framework, for further (inter)national consideration. These Dutch schemes should be reviewed on a global scale, to develop a scheme that is more consistent with current and foreseen developments and changing ideas on health. Implications for Rehabilitation We propose policy makers on community, regional and (inter)national level to consider the use of the alternative schemes of the International Classification of Functioning, Disability and Health within their plans to promote functioning and health of their citizens and researchers and teachers to incorporate the alternative schemes into their research and education to emphasize the biopsychosocial paradigm. We propose to set up an international Delphi procedure involving citizens (including patients), experts in healthcare, occupational care, research, education and policy, and planning to get consensus on an alternative scheme of the International Classification of Functioning, Disability and Health. We recommend to discuss the alternatives for the present scheme of the International Classification of Functioning, Disability and Health in the present update and revision process within the World Health Organization as a part of the discussion on the future of the International Classification of Functioning, Disability and Health framework (including ontology, title and relation with the International Classification of Diseases). We recommend to revise the definition of personal factors and to draft a list of personal factors that can be used in policy making, clinical practice, research, and education and to put effort in the revision of the present list of environmental factors to make it more useful in, e.g., occupational health care.

Associations between chronic conditions, body functions, activity limitations and participation restrictions: a cross-sectional approach in Spanish non-clinical populations

OBJECTIVES

To analyse the relationships between chronic conditions, body functions, activity limitations and participation restrictions in the International Classification of Functioning, Disability and Health (ICF) framework.

DESIGN

A cross-sectional study.

SETTING

2 geographical areas in the Autonomous Region of Aragon, Spain, namely, a rural area, Cinco Villas, and an urban area in the city of Zaragoza.

PARTICIPANTS

864 individuals selected by simple random sampling from the register of Social Security card holders, aged 50 years and over, positive to disability screening.

MAIN OUTCOME MEASURES

ICF Checklist-body function domains, WHO Disability Assessment Schedule 2.0 (WHODAS 2.0, 36-item (WHODAS-36)) global scores and medical diagnoses (chronic conditions) from primary care records.

RESULTS

Mild disability (WHODAS-36 level 5-24%) was present in 51.5% of the sample. In the adjusted ordinal regression model with WHODAS-36 as the dependent variable, disability was substantially associated with moderate-to-complete impairment in the following functions: mental, OR 212.8 (95% CI 72 to 628.9); neuromusculoskeletal, OR 44.8 (24.2 to 82.8); and sensory and pain, OR 6.3 (3.5 to 11.2). In the relationship between health conditions and body function impairments, the strongest links were seen for: dementia with mental functions, OR 50.6 (25.1 to 102.1); cerebrovascular disease with neuromusculoskeletal function, OR 5.8 (3.5 to 9.7); and chronic renal failure with sensory function and pain, OR 3.0 (1.49 to 6.4). Dementia, OR 8.1 (4.4 to 14.7) and cerebrovascular disease, OR 4.1 (2.7 to 6.4) were associated with WHODAS-36 scores.

CONCLUSIONS

Body functions are heterogeneously linked to limitations in activities and restrictions on participation, with the highest impact being due to mental and musculoskeletal functions. This may be relevant for disability assessment and intervention design, particularly if defined on a body function basis. Control of specific health conditions, such as dementia and cerebrovascular disease, appears to be paramount in reducing disability among persons aged 50 years and over.

The ICF (International Classification of Functioning, Disability and Health) developed by the WHO for measuring function in hemophilia

INTRODUCTION

Assessment of the disease in people with hemophilia (PWH) must include an analysis of functioning. Researchers have done a lot of work over the last two decades in developing disease specific assessment tools in hemophilia - some of them based on the ICF (International Classification of Functioning, Disability and Health).

AREAS COVERED

This article is a narrative review of the ICF developed by the World Health Organization (WHO) in the context of hemophilia. Expert commentary: The WFH has developed a website with a 'compendium of assessment tools' based on the ICF. The ICF developed by the WHO makes it possible to propose an approach that prioritizes capacities over difficulties. This article is intended to motivate physicians who treat PWH to incorporate the ICF into their assessments. A generalized use of the ICF will provide a common communication context. The ICF developed by the WHO should be used in hemophilia.

Capturing patients' needs in casemix: a systematic literature review on the value of adding functioning information in reimbursement systems

BACKGROUND

Contemporary casemix systems for health services need to ensure that payment rates adequately account for actual resource consumption based on patients' needs for services. It has been argued that functioning information, as one important determinant of health service provision and resource use, should be taken into account when developing casemix systems. However, there has to date been little systematic collation of the evidence on the extent to which the addition of functioning information into existing casemix systems adds value to those systems with regard to the predictive power and resource variation explained by the groupings of these systems. Thus, the objective of this research was to examine the value of adding functioning information into casemix systems with respect to the prediction of resource use as measured by costs and length of stay.

METHODS

A systematic literature review was performed. Peer-reviewed studies, published before May 2014 were retrieved from CINAHL, EconLit, Embase, JSTOR, PubMed and Sociological Abstracts using keywords related to functioning ('Functioning', 'Functional status', 'Function*, 'ICF', 'International Classification of Functioning, Disability and Health', 'Activities of Daily Living' or 'ADL') and casemix systems ('Casemix', 'case mix', 'Diagnosis Related Groups', 'Function Related Groups', 'Resource Utilization Groups' or 'AN-SNAP'). In addition, a hand search of reference lists of included articles was conducted. Information about study aims, design, country, setting, methods, outcome variables, study results, and information regarding the authors' discussion of results, study limitations and implications was extracted.

RESULTS

Ten included studies provided evidence demonstrating that adding functioning information into casemix systems improves predictive ability and fosters homogeneity in casemix groups with regard to costs and length of stay. Collection and integration of functioning information varied across studies. Results suggest that, in particular, DRG casemix systems can be improved in predicting resource use and capturing outcomes for frail elderly or severely functioning-impaired patients.

CONCLUSION

Further exploration of the value of adding functioning information into casemix systems is one promising approach to improve casemix systems ability to adequately capture the differences in patient's needs for services and to better predict resource use.