Åsa Lundgren-Nilsson

Internal construct validity of the Shirom-Melamed Burnout Questionnaire (SMBQ)

BackgroundBurnout is a mental condition defined as a result of continuous and long-term stress exposure, particularly related to psychosocial factors at work. This paper seeks to examine the psychometric properties of the Shirom-Melamed Burnout Questionnaire (SMBQ) for validation of use in a clinical setting.MethodsData from both a clinical (319) and general population (319) samples of health care and social insurance workers were included in the study. Data were analysed using both classical and modern test theory approaches, including Confirmatory Factor Analysis (CFA) and Rasch analysis.ResultsOf the 638 people recruited into the study 416 (65%) persons were working full or part time. Data from the SMBQ failed a CFA, and initially failed to satisfy Rasch model expectations. After the removal of 4 of the original items measuring tension, and accommodating local dependency in the data, model expectations were met. As such, the total score from the revised scale is a sufficient statistic for ascertaining burnout and an interval scale transformation is available. The scale as a whole was perfectly targeted to the joint sample. A cut point of 4.4 for severe burnout was chosen at the intersection of the distributions of the clinical and general population.ConclusionA revised 18 item version of the SMBQ satisfies modern measurement standards. Using its cut point it offers the opportunity to identify potential clinical cases of burnout.

Cross-cultural validity of functional independence measure items in stroke: A study using Rasch analysis

OBJECTIVE To analyse cross-cultural validity of the Functional Independence Measure (FIM) in patients with stroke using the Rasch model. SETTINGS Thirty-one rehabilitation facilities within 6 different countries in Europe. PARTICIPANTS A total of 2546 in-patients at admission, median age 63 years. METHODS Data from the FIM were evaluated with the Rasch model, using the Rasch analysis package RUMM2020. A detailed analysis of scoring functions of the 7 categories of the FIM items was undertaken prior to testing fit to the model. Categories were re-scored where necessary. Analysis of Differential Item Functioning was undertaken in pooled data for each of the FIM motor and social-cognitive scales, respectively. RESULTS Disordered thresholds were found on most items when using 7 categories. Fit to the Rasch model varied between countries. Differential Item Functioning was found by country for most items. Adequate fit to the Rasch model was achieved when items were treated as unique for each country and after a few country-specific items were removed. CONCLUSION Clinical collected data from FIM for patients with stroke cannot be pooled in its raw form, or compared across countries. Comparisons can be made after adjusting for country-specific Differential Item Functioning, though the adjustments for Differential Item Functioning and rating scales may not generalize to other samples.

Construct validity of the Psychological General Well Being Index (PGWBI) in a sample of patients undergoing treatment for stress-related exhaustion: a Rasch analysis.

PurposeThe Psychological General Well Being Index (PGWBI) is a widely used scale across many conditions. Over time issues have been raised about the dimensional structure of the scale, and it has not yet been subjected to scrutiny by modern Psychometric approaches. The current study thus evaluates the PGWBI with Rasch- and factor analysis.MethodsConsecutive patients recruited to a tertiary stress clinic were administered the PGBWI as part of routine clinical assessment at baseline and three months. Data from the scale was subjected to Factor Analyses and to Rasch analysis. In both cases adjustments for local independence violations were allowed.Results179 patients were recruited, with a mean age of 43 years, and of whom 70% were female. An initial Confirmatory Factor Analysis (CFA) with baseline data failed, but the modification indices also indicated considerable levels of local dependency requiring errors to be correlated. An EFA highlighted positive and negative effect domains. Rasch analysis confirmed that fit of data to the model was influenced by local dependency, and that in practice if the items from the six underlying domains were treated as six ‘super’ items, the scale was shown to measure one dominant construct of well being. An interval scale transformation was therefore possible. A significant improvement in well-being was observed over a three month period.ConclusionThe PGWBI scale has satisfactory internal construct validity when tested with modern psychometric techniques, using data obtained from patients treated for stress-related exhaustion. The instrument has qualities that make it suitable also for monitoring well-being during interventions for stress-related exhaustion/clinical burnout.

Cross-cultural validity of FIM in spinal cord injury

Objective:To analyse cross-culture validity of the Functional Independence Measure (FIM™) in patients with a spinal cord injury using a modern psychometric approach.Settings:A total of 19 rehabilitation facilities from four countries in Europe.Participants:A total of 647 patients at admission, median age 46 years, 69% male.Methods:Data from the FIM™, collected on inpatient admission, was fitted to the Rasch model. A detailed analysis of scoring functions of the seven categories of the FIM™ items was undertaken before to testing fit to the model. Categories were rescored where necessary. Fit to the model was assessed initially within country, and then in the pooled data. Analysis of differential item functioning (DIF) was undertaken in the pooled data for each of the FIM™ motor and social cognitive scales, respectively. Final fit to the model was tested for breach of local independence by principle components analysis (PCA).Results:The present scoring system for the FIM™ motor and cognitive scales, that is a seven category scale, was found to be invalid, necessitating extensive rescoring. Following this, DIF was found in a number of items within the motor scale, requiring a complex solution of splitting items by country to allow for the valid pooling of data. Five country-specific items could not be retained within this solution. The FIM cognitive scale fitted the Rasch model after rescoring, but there was a substantial ceiling effect.Conclusions:Data from the FIM™ motor scale for patients with spinal cord injury should not be pooled in its raw form, or compared from country to country. Only after fit to the Rasch model and necessary adjustments could such a comparison be made, but with a loss of clinical important items. The FIM cognitive scale works well following rescoring, and data may be pooled, but many patients were at the maximum score.

Functioning of stroke survivors – A validation of the ICF core set for stroke in Sweden

Purpose. To validate the body functions and activities and participation part of the extended International Classification of Functioning, Disability, and Health (ICF) core set for stroke with a Swedish population in the first 3 months post-stroke. Method. At 6 weeks and at 3 months post-stroke, stroke survivors were evaluated by 59 ICF categories of body functions, 59 categories of activities and participation from the stroke ICF core set (extended version). Results. The study sample included 99 stroke survivors (54% women) with an average age of 72 years. Statistical significant problems were identified in 28 ICF categories of body functions and in 41 ICF categories of activities and participation at both time points, at 6 weeks and at 3 months. About 17 ICF categories were reported as problems in independent (i.e. modified Rankin Scale (mRS) ≤2) and about 34 categories in dependent (i.e. mRS > 2) stroke survivors. Conclusions. The results suggest a possible reduction of the stroke ICF core set from 59 to 28 categories of body functions and from 59 to 41 categories of activities and participation. Hence, feasibility of the core set for multiprofessional assessment increases and the core set might find more integration in clinical practice. The number of problems in mobility and self-care mainly distinguished between independent and dependent stroke survivors.

Cross-diagnostic validity in a generic instrument: an example from the Functional Independence Measure in Scandinavia

BackgroundTo analyse the cross-diagnostic validity of the Functional Independence Measure (FIM™) motor items in patients with spinal cord injury, stroke and traumatic brain injury and the comparability of summed scores between these diagnoses.MethodsData from 471 patients on FIM™ motor items at admission (stroke 157, spinal cord injury 157 and traumatic brain injury 157), age range 11–90 years and 70 % male in nine rehabilitation facilities in Scandinavia, were fitted to the Rasch model. A detailed analysis of scoring functions of the seven categories of the FIM™ motor items was made prior to testing fit to the model. Categories were re-scored where necessary. Fit to the model was assessed initially within diagnosis and then in the pooled data. Analysis of Differential Item Functioning (DIF) was undertaken in the pooled data for the FIM™ motor scale. Comparability of sum scores between diagnoses was tested by Test Equating.ResultsThe present seven category scoring system for the FIM™ motor items was found to be invalid, necessitating extensive rescoring. Despite rescoring, the item-trait interaction fit statistic was significant and two individual items showed misfit to the model, Eating and Bladder management. DIF was also found for Spinal Cord Injury, compared with the other two diagnoses. After adjustment, it was possible to make appropriate comparisons of sum scores between the three diagnoses.ConclusionThe seven-category response function is a problem for the FIM™ instrument, and a reduction of responses might increase the validity of the instrument. Likewise, the removal of items that do not fit the underlying trait would improve the validity of the scale in these groups. Cross-diagnostic DIF is also a problem but for clinical use sum scores on group data in a generic instrument such as the FIM™ can be compared with appropriate adjustments. Thus, when planning interventions (group or individual), developing rehabilitation programs or comparing patient achievements in individual items, cross-diagnostic DIF must be taken into account.

SALGOT - Stroke Arm Longitudinal study at the University of Gothenburg, prospective cohort study protocol

BackgroundRecovery patterns of upper extremity motor function have been described in several longitudinal studies, but most of these studies have had selected samples, short follow up times or insufficient outcomes on motor function. The general understanding is that improvements in upper extremity occur mainly during the first month after the stroke incident and little if any, significant recovery can be gained after 3-6 months. The purpose of this study is to describe the recovery of upper extremity function longitudinally in a non-selected sample initially admitted to a stroke unit with first ever stroke, living in Gothenburg urban area.Methods/DesignA sample of 120 participants with a first-ever stroke and impaired upper extremity function will be consecutively included from an acute stroke unit and followed longitudinally for one year. Assessments are performed at eight occasions: at day 3 and 10, week 3, 4 and 6, month 3, 6 and 12 after onset of stroke. The primary clinical outcome measures are Action Research Arm Test and Fugl-Meyer Assessment for Upper Extremity. As additional measures, two new computer based objective methods with kinematic analysis of arm movements are used. The ABILHAND questionnaire of manual ability, Stroke Impact Scale, grip strength, spasticity, pain, passive range of motion and cognitive function will be assessed as well. At one year follow up, two patient reported outcomes, Impact on Participation and Autonomy and EuroQol Quality of Life Scale, will be added to cover the status of participation and aspects of health related quality of life.DiscussionThis study comprises a non-selected population with first ever stroke and impaired arm function. Measurements are performed both using traditional clinical assessments as well as computer based measurement systems providing objective kinematic data. The ICF classification of functioning, disability and health is used as framework for the selection of assessment measures. The study design with several repeated measurements on motor function will give us more confident information about the recovery patterns after stroke. This knowledge is essential both for optimizing rehabilitation planning as well as providing important information to the patient about the recovery perspectives.Trial registrationClinicalTrials.gov: NCT01115348

Facilitators and barriers of stroke survivors in the early post-stroke phase

Purpose. To identify facilitators and barriers among persons with first-ever stroke discharged to the home in the first 3 months post-stroke by means of ICF categories. Method. Stroke survivors were interviewed using semi-structured questions based on the ICF categories of Environmental factors of the Comprehensive ICF Core Set for Stroke (extended version) at 6 weeks and at 3 months post-stroke. Results. The study sample exists of 67 stroke survivors with an average age of 71 years (51% women). Eleven environmental factors from the ICF chapters ‘support and relationship’, ‘products and technology’ and ‘services, systems and policies’ were experienced to be facilitators and only ‘physical geography’ was experienced as a barrier by 50% or more of the participants in the study. Conclusions. It was possible to document facilitators and barriers among stroke survivors in a structured way using ICF categories. The high number of experienced facilitators gives an idea of how well stroke care functions in Sweden. There is a great need for further studies examining environmental factors in the post-stroke phase.

Two years after cardiac arrest; cognitive status, ADL function and living situation

Purpose: To describe cognitive function, activities of daily living (ADL), housing and return to work after cardiac arrest (CA) and examine the prognostic value of early assessments. Method: Two years after CA 22 persons were assessed with the Barrow Neurological Screen for Higher Cerebral Functions (BNIS) and the Functional Independence Measure (FIM™). Data on early assessments of neurological status (The National Institute of Health Stroke Scale, NIHSS), mental status (the Mini Mental State Examination, MMSE) and ADL ability (FIM™) were retrieved. Results: Sixty-four per cent were living in their own home, 36% lived in sheltered accommodation and 29% of those of working age had returned to work. Cognitive dysfunction was noted in 95% according to neuropsychological screen. Four persons living in own homes were in need of assistance in social-cognitive ADL. All those in sheltered accommodation needed help in ADL; one was independent in motor functions. This need for assistance was reflected at initial assessments by a higher degree of neurological deficits, cognitive dysfunctions and dependency in ADL activities. Conclusion: The majority had persistent cognitive dysfunctions. Persons in sheltered accommodation were dependent for ADL. Early evaluation is important for understanding and planning for future need for assistance and care, having realistic goals.

Is Pain Intensity Really That Important to Assess in Chronic Pain Patients? A Study Based on the Swedish Quality Registry for Pain Rehabilitation (SQRP)

Background Incorporating the patients view on care and treatment has become increasingly important for health care. Patients describe the variety of consequences of their chronic pain conditions as significant pain intensity, depression, and anxiety. We hypothesised that intensities of common symptoms in chronic pain conditions carry important information that can be used to identify clinically relevant subgroups. This study has three aims: 1) to determine the importance of different symptoms with respect to participation and ill-health; 2) to identify subgroups based on data concerning important symptoms; and 3) to determine the secondary consequences for the identified subgroups with respect to participation and health factors. Methods and Subjects This study is based on a cohort of patients referred to a multidisciplinary pain centre at a university hospital (n = 4645, participation rate 88%) in Sweden. The patients answered a number of questionnaires concerning symptoms, participation, and health aspects as a part of the Swedish Quality Registry for Pain Rehabilitation (SQRP). Results Common symptoms (such as pain intensity, depression, and anxiety) in patients with chronic pain showed great variability across subjects and 60% of the cohort had normal values with respect to depressive and anxiety symptoms. Pain intensity more than psychological symptoms showed stronger relationships with participation and health. It was possible to identify subgroups based on pain intensity, depression, and anxiety. With respect to participation and health, high depressive symptomatology had greater negative consequences than high anxiety. Conclusions Common symptoms (such as pain intensity and depressive and anxiety symptoms) in chronic pain conditions carry important information that can be used to identify clinically relevant subgroups.