Validity and internal consistency of the thoracic outlet syndrome index for patients with thoracic outlet syndrome.

BACKGROUND: No validated scales exist specifically for measuring quality of life (QoL) and functioning level in patients with thoracic outlet syndrome (TOS). This cross-sectional survey examined whether some items adopted from validated QoL scales could be suitable for patients with TOS. METHODS: To find an optimal thoracic outlet syndrome index (TOSI), a panel of 14 specialists experienced in treating TOS independently evaluated the relevance of 19 items adopted from scales used in other upper-extremity syndromes. After undergoing surgery for TOS, 52 patients rated the relevance of those items found by experts to be relevant. Content validity was measured by a content validity index, content validity ratio, and modified κ. The internal consistency of 15 retained items was assessed with the Cronbach α, and its construct validity was assessed by an exploratory factor analysis. RESULTS: Of the 19 items, 15 were considered relevant for TOS by the panelists, with an overall test content validity index of 0.93. The internal consistency of these 15 items was excellent. The exploratory factor analysis accompanied by a parallel analysis confirmed the uni-dimensionality of the TOSI. All 15 items that the panelists considered relevant were also items that the patients marked with scores over 7 points on an 11-point scale of relevance. CONCLUSION: The internally consistent, face- and content-valid TOSI scale is proposed for use in evaluating specifically the QoL in TOS patients, as well as improving future longitudinal studies comparing functioning before and after interventions or spontaneous recovery in TOS patients.

Violists and Violinists Report More Intense Hand Pain on NRS Than Other Orchestra Musicians.

AIMS: Among musicians, string players have the highest prevalence for musculoskeletal overuse. Playing a violin or viola requires rapid, repetitive, and complicated movements of the hands and fingers. This cross-sectional study aimed to examine whether violin/viola, violin/cello, and violin/French horn players experience more intense musculoskeletal pain than other instrumentalists. METHODS: The study sample consisted of 590 orchestra musicians (354 male, 236 female, mean age 36 yrs). Self-administered questionnaires were used to assess pain of the back, neck, shoulder, face, jaw, and upper extremity. Pain intensity during the last 7 days was measured by an 11-point numeric rating scale (NRS) with a score from 0 to 10, as well as was disadvantage at work and leisure. RESULTS: Of the interviewed musicians, 20% presented playing-related musculoskeletal disorders at the time of the interview. Compared to other professional orchestra musicians, violin and viola players reported significantly more intense pain in the hand during the last week. Also, they had experienced more frequent neck pain ever and in 5 years than the others. During the past 30 days, violin and viola players had also perceived more harm in their upper limb joints. Violin/cello and violin/French horn players did not differ from the others. CONCLUSIONS: Our study showed that musicians playing the violin or viola have more intense hand pain and more frequent neck pain than other musicians, but these seem to disturb their daily tasks only a little.

Comparing functioning in spinal cord injury and in chronic spinal pain with two ICF-based instruments: WHODAS 2.0 and the WHO minimal generic data set covering functioning and health.

OBJECTIVE: To investigate whether the two briefest validated ICF-based (International Classification of Functioning, Disability and Health) tools can detect differences between different spinal conditions. DESIGN: Cross-sectional study. SETTING: University hospital rehabilitation clinic. SUBJECTS: A total of 84 patients with spinal cord injury and 81 with chronic spinal pain. MAIN MEASURES: Disability evaluated using self-reported and proxy 12-item WHODAS 2.0 ((World Health Organization Disability Assessment Schedule), and physician-rated WHO minimal generic data set covering functioning and health. FINDINGS: The two measures used showed severe disability in both patient populations, those with spinal cord injury (mean age 47.5 years, SD 13.2) and those with chronic spinal pain (mean age 47.2 years, SD 9.5), WHODAS patient sum being 18.4 (SD 9.6) versus 22.0 (SD 9.0), P < 0.05, and the WHO generic data set 15.6 (SD 4.4) versus 14.2 (SD 3.7), P < 0.01, respectively. Correlations between patient and proxy ratings and between the two disability scales were mostly strong. Severe restrictions were found in the working ability of both the populations, in mobility of patients with spinal cord injury and in pain function of patients with chronic spinal pain. In this tertiary clinic patient population, patients with spinal pain perceived more problems in emotional and cognitive functions, and in participation than patients with spinal cord injury. CONCLUSIONS: Both scales were able to find differences between two patient populations with severe disability.

Comparing disability between traumatic brain injury and spinal cord injury using the 12-item WHODAS 2.0 and the WHO minimal generic data set covering functioning and health.

OBJECTIVE:: To compare disability between two patient groups using short validated tools based on International Classification of Functioning, Disability and Health (ICF). DESIGN:: Cross-sectional study. SETTING:: University hospital specialist outpatient clinic. SUBJECTS:: A total of 94 patients with traumatic brain injury and 59 with spinal cord injury. MAIN MEASURES:: Disability evaluated using self-reported and proxy 12-item WHODAS 2.0 (World Health Organization Disability Assessment Schedule), and physician-rated WHO minimal generic data set covering functioning and health. RESULTS:: The two measures used showed severe but very different disabilities in these patient groups. Disability was assessed worse by physicians in the spinal cord injury population (sum 15.8 vs. 12.7, P = 0.0001), whereas disability assessed by the patients did not differ significantly between the two groups (sum 18.4 vs. 21.2). Further analysis revealed that in patients with "high disability" (the minimal generic data set score ⩾15), self-reported functioning was more severely impaired in the traumatic brain injury group compared to the spinal cord injury group (29.7 vs. 21.4, P < 0.0001), with no difference between these two diagnostic groups in patients with "low disability" (the minimal generic data set below 15). Patients with traumatic brain injury perceived more difficulties in cognition, getting along and participation, patients with spinal cord injury in mobility and self-care. CONCLUSION:: Both generic measures were able to detect severe disability but also to detect differences between two patient populations with different underlying diagnoses.

Effectiveness of myofascial release in treatment of chronic musculoskeletal pain: a systematic review.

OBJECTIVE: To evaluate the evidence on the effectiveness of myofascial release therapy to relieve chronic musculoskeletal pain and to improve joint mobility, functioning level, and quality of life in pain sufferers. Data sources and review: Randomized controlled trials were systematically gathered from CENTRAL, Medline, Embase, CINAHL, Scopus, and PEDro databases. The methodological quality of articles was assessed according to the Cochrane Collaboration's domain-based framework. In addition, the effect sizes of main outcomes were calculated based on reported means and variances at baseline and in follow-up. RESULTS: Of 513 identified records, 8 were relevant. Two trials focused on lateral epicondylitis ( N = 95), two on fibromyalgia ( N = 145), three on low back pain ( N = 152), and one on heel pain ( N = 65). The risk of bias was considered low in three and high in five trials. The duration of therapy was 30-90 minutes 4 to 24 times during 2-20 weeks. The effect sizes did not reach the minimal clinically important difference for pain and disability in the studies of low back pain or fibromyalgia. In another three studies with the high risk of bias, the level of minimal clinically important difference was reached up to two-month follow-up. CONCLUSION: Current evidence on myofascial release therapy is not sufficient to warrant this treatment in chronic musculoskeletal pain.

Validity and internal consistency of the Helsinki Serratus Palsy Index for patients with serratus palsy.

BACKGROUND: To our knowledge, no validated scales exist as yet for measuring quality of life and functioning level in patients with serratus palsy. This cross-sectional survey study examined whether a broadly validated Western Ontario Rotator Cuff Index (WORC) could be partially adapted for patients with serratus palsy. METHODS: The relevancy of WORC, 21 items, along with 4 additional new items, was tested by 95 patients with serratus palsy and a panel of 9 medical experts. Its content validity was measured by a content validity index (CVI), a content validity ratio (CVR), and a modified κ. The internal consistency of 11 retained items was assessed with the Cronbach α. Its construct validity was assessed by exploratory factor analysis. RESULTS: Of the 25 items, 11 were considered relevant (CVI ≥0.78) for serratus palsy by the panelists, with overall test CVI (S-CVI) of 0.86. The internal consistency of these 11 items was excellent, with a Cronbach α of 0.94. The exploratory factor analysis accompanied by a parallel analysis confirmed the unidimensionality of a new test. All except 2 items of WORC that were considered relevant by the panelists were also marked with scores of >5 by the patients on an 11-point scale of relevancy. CONCLUSIONS: Adapted from the WORC, the new 11-item Helsinki Serratus Palsy Index scale was internally consistent and face and content valid for serratus palsy patients.

Pelvic incidence and hip disorders.

Background and purpose - The role of pelvic incidence in hip disorders is unclear. Therefore, we undertook a literature review to evaluate the evidence on that role. Methods - A search was carried out on MEDLINE, SCOPUS, CENTRAL, and CINAHL databases. Quantitative analysis was based on comparison with a reference population of asymptomatic subjects. Results - The search resulted in 326 records: 15 studies were analyzed qualitatively and 13 quantitatively. The estimates of pelvic incidence varied more than 10 degrees from 47 (SD 3.7) to 59 (SD 14). 2 studies concluded that higher pelvic incidence might contribute to the development of coxarthrosis while 1 study reported the opposite findings. In 2 studies, lower pelvic incidence was associated with a mixed type of femoroacetabular impingement. We formed a reference population from asymptomatic groups used or cited in the selected studies. The reference comprised 777 persons with pooled average pelvic incidence of 53 (SD 10) degrees. The estimate showed a relatively narrow 95% CI of 52 to 54 degrees. The 95% CIs of only 4 studies did not overlap the CIs of reference: 2 studies on coxarthrosis, 1 on mixed femoroacetabular impingement, and 1 on ankylosing spondylitis Interpretation - We found no strong evidence that pelvic incidence plays any substantial role in hip disorders. Lower pelvic incidence may be associated with the mixed type of femoroacetabular impingement and hip problems amongst patients with ankylosing spondylitis. The evidence on association between pelvic incidence and coxarthrosis remained inconclusive.

Confirmatory factor analysis of 12-Item World Health Organization Disability Assessment Schedule in patients with musculoskeletal pain conditions.

OBJECTIVE: To investigate the factor structure of the 12 item World Health Organization Disability Assessment Schedule (WHODAS) 2.0. DESIGN: Cross-sectional cohort survey study. SETTING: Physical and Rehabilitation Medicine outpatient university clinic. SUBJECTS: The 408 consecutive patients with chronic musculoskeletal pain. MAIN MEASURES: Exploratory and confirmatory factor analysis. RESULTS: A two-factor model most accurately fit the observed data of musculoskeletal pain patients (root mean square error of approximation 0.049, relative Chi square value 1.99). Twelve WHODAS 2.0 items were distributed between two factors with covariance between them of 0.8. The first factor contained domains related mostly to physical functioning, while another was associated mostly with social and cognitive functioning. There were a few differences between single items in their importance in defining the variance within these two factors. Of the six International Classification of Functioning, Disability and Health domains belonging to the first construct, the ability to carry out household responsibilities explained most, 84% of the total variance in this construct. For the second factor, the ability to participate in community activities seemed to be the most important, explaining 85% of the total variance in this construct. CONCLUSIONS: In this study, the two-factor structure model of the 12-item WODAS 2.0 demonstrated the most accurate fit within patients with musculoskeletal pain conditions.

A study of the psychometric properties of 12-item World Health Organization Disability Assessment Schedule 2.0 in a large population of people with chronic musculoskeletal pain.

OBJECTIVE: To assess the validity of the Finnish translation of the 12-item World Health Organization Disability Assessment Schedule (WHODAS 2.0). DESIGN: Cross-sectional cohort survey study. SETTING: Physical and Rehabilitation Medicine outpatient university clinic. SUBJECTS: The 501 consecutive patients with chronic musculoskeletal pain. MAIN MEASURES: Exploratory factor analysis and a graded response model using item response theory analysis were used to assess the constructs and discrimination ability of WHODAS 2.0. RESULTS: The exploratory factor analysis revealed two retained factors with eigenvalues 5.15 and 1.04. Discrimination ability of all items was high or perfect, varying from 1.2 to 2.5. The difficulty levels of seven out of 12 items were shifted towards the elevated disability level. As a result, the entire test characteristic curve showed a shift towards higher levels of disability, placing it at the point of disability level of +1 (where 0 indicates the average level of disability within the sample). CONCLUSIONS: The present data indicate that the Finnish translation of the 12-item WHODAS 2.0 is a valid instrument for measuring restrictions of activity and participation among patients with chronic musculoskeletal pain.

A 12-year Trend of Psychological Distress: National Study of Finnish University Students.

OBJECTIVE: The study aimed to explore changes in the prevalence of psychological distress and co-occurring psychological symptoms among 19-34 years old Finnish university students between the years 2000 and 2012. METHODS: The prevalence of perceived frequent psychological symptoms was compared in four nationwide cross-sectional student health surveys with random samples (N=11,502) in the following years: 2000 (N=3,174), 2004 (N=3,153), 2008 (N=2,750), and 2012 (N=2,425). RESULTS: In the time phase from 2000 to 2012, the overall psychological distress (12-item General Health Questionnaire, GHQ-12) increased from 22% to 28%, while there was also an increase in the frequently experienced psychological symptoms (depressiveness from 13% to 15%, anxiety from 8% to 13%, concentration problems from 12% to 18%, and psychological tension from 13% to 18% with a peak prevalence observed in 2008). The co-occurrence of different psychological symptoms increased as well. Psychological distress was more common in females and in older students. CONCLUSIONS: The findings suggest an increasing trend of frequent psychological distress among Finnish university students over the years from 2000 to 2012, with the peak prevalence occurring in 2008, which may reflect the growing multifaceted environmental demands.

Thoracic outlet syndrome.

It is important to remember the possibility of nonspecific thoracic outlet syndrome (TOS) when treating patients with neck and upper extremity symptoms. There are no specific diagnostic criteria for the syndrome. Diagnosis is based on symptoms, clinical examination and the ruling out of other causes. The first-line option of clinical care is conservative treatment, which in most cases is sufficient for the patient to regain normal functioning. However, some of the most difficult TOS patients need surgical treatment, especially when persistent symptoms have already begun in adolescence, and if compression of neural or vascular structures is thought to result from anatomical structures. Conservative treatment options are essential also for surgically treated patients.

Is Alcohol Consumption Associated with Job Strain Among Professional Musicians?

OBJECTIVE: To assess the strength of the relationship between alcohol consumption and job strain experienced by professional musicians. METHODS: Cross-sectional survey among professional orchestra musicians (n=1,550, response rate 41%, data available for 590 respondents). The difference between groups with and without job strain was assessed by two-way analysis of variance. RESULTS: The median alcohol consumption was 48 g/wk (range 1-648, IQR 12-96). There were only 25 (4%) heavy drinkers, defined as people who consume >210 g of pure alcohol a week. The average frequency of drinking was 2.1 times/wk (SD 2.0, range 0-7). Of the respondents, 125 (21%) reported an elevated level of job strain as defined by the responses to Job Content Questionnaire. There was no significant interaction between the effects of gender and job strain on alcohol consumption: F(1, 586) = 0.82, p=0.365. Simple main effects analysis showed that males were consuming alcohol significantly more than females were (p=0.0005), but there were no differences between participants with elevated level of job strain compared with the rest of the sample (p=0.546). CONCLUSIONS: The amount of alcohol consumed was not associated with the presence or absence of perceived occupational strain among professional orchestra musicians.

Adolescent cervical disc degeneration in MRI does not predict adult headache or neck pain: A 5-year follow-up of adolescents with and without headache.

AIM: The impact of early degenerative changes of the cervical spine on pain in adulthood is unknown. The objective was to determine whether degeneration in adolescence predicts headache or neck pain in young adulthood. METHODS: As part of a follow-up of schoolchildren with and without headache, 17-year-old adolescents with headache at least three times a month (N = 47) and adolescents with no headache (N = 22) participated in a magnetic resonance imaging (MRI) study of the cervical spine. The same adolescents were re-examined by phone interview at the age of 22 years (N = 60/69, 87%). RESULTS: Mild disc degeneration at the age of 17 years was common, but was not associated with either frequent or intensive headache or neck pain at the age of 22 years. Conclusion: Mild degenerative changes of the cervical spine in 17-year-old adolescents cannot be regarded as a cause of future headache or neck pain.

Short- and long-term changes in perceived work ability after interdisciplinary rehabilitation of chronic musculoskeletal disorders: prospective cohort study among 854 rehabilitants.

OBJECTIVE: To investigate the changes in rehabilitants' perceived work ability after rehabilitation for chronic musculoskeletal disorders with respect to the baseline characteristics. DESIGN: Prospective cohort study based on register and repeated survey data. SETTING: Public sector employees in ten towns and five hospital districts. SUBJECTS: A total of 854 employees who participated in the rehabilitation programme owing to common chronic musculoskeletal disorders between 1997 and 2009. INTERVENTIONS: Interdisciplinary, biopsychosocial, inpatient rehabilitation programme targeting people of working age with common chronic musculoskeletal disorders. The programme was executed in different rehabilitation centres across the country and funded by the Social Insurance Institution of Finland. MAIN MEASURES: Differences in perceived work ability level before and after rehabilitation. Data were derived from repeated surveys on average 2.1 years before rehabilitation, and 1.5 years (short-term follow-up) and 6.0 years (long-term follow-up) after rehabilitation. RESULTS: Before the rehabilitation, perceived work ability was 7.13 (SD 1.84) among the rehabilitants and 7.27 (SD 1.72) in the matched reference population. Among rehabilitants, this figure decreased by 0.82 (95% confidence interval -0.98 to -0.67) in the short-term and by 1.26 (95% confidence interval -1.45 to -1.07) in the long-term follow-up. Only slight differences in steepness of this deterioration were observed between subgroups, created based on the participants' baseline characteristics. CONCLUSIONS: Perceived work ability of participants, in an interdisciplinary biopsychosocial rehabilitation programme for common musculoskeletal disorders, deteriorated regardless of any studied pretreatment characteristics. The improvement of work ability may be an unrealistic goal for participants in this type of rehabilitation.

[Examination of neck pain in adults]. / Aikuisen kipeä niska.

An accurate diagnosis is not obtained for most patients suffering from neck symptoms. Benign nonspecific pain is most common. Knowledge of functional anatomy and neuroanatomy forms the basis of clinical examination. Anamnesis and clinical examination are utilized to explore the need for further investigation and therapy. No particular instrumental investigations are needed in the exploration of the pain, unless the symptoms and clinical findings indicate any severe or specific illness. In clinical work it is practical to divide neck pain into four groups: a severe or specific illness, nerve root entrapment, nonspecific neck pain and whiplash injury.

Return to work after traumatic brain injury: Systematic review.

OBJECTIVE: To evaluate the evidence on pre- and post-injury predictors of vocational outcome after traumatic brain injury (TBI). LITERATURE SELECTION AND CRITICAL ANALYSIS: The search was conducted on PubMed and Central databases since 1990. A clinical question was formulated according to the PICO framework. Clinical relevance of the selected studies was evaluated following the GRADE framework. MAIN OUTCOMES AND RESULTS: The main outcome measures were employment status and return to work after TBI. Methodological quality of most of the relevant 12 controlled and 68 uncontrolled studies included in the review was estimated as very low. There was weak evidence that age, educational level, pre- and post-injury occupational status, severity of TBI, functional status, level of depression and anxiety, gender and race may be predictive for the vocational outcome after TBI. CONCLUSIONS AND IMPLICATIONS FOR FURTHER RESEARCH: No strong evidence was found that vocational outcomes after TBI could be predicted or improved. There is a need for both experimental and observational well-conducted studies on this important subject. Researchers are strongly encouraged to use unified and standardized terms and scales in further studies. The authors suggest the International Classification of Functioning, Disability and Health (ICF) as the best tool available for this purpose.

Vocational rehabilitation evaluation and the International Classification of Functioning, Disability, and Health (ICF).

PURPOSE: To identify the most frequent functional limitations according to the International Classification of Functioning, Disability, and Health (ICF) obtained by unstandardised clinical assessment of patients with chronic musculoskeletal disorders who underwent vocational rehabilitation evaluation; and to compare the obtained list with simplified versions of ICF. METHODS: The descriptions of functional limitations were retrospectively identified for 32 patients. The original vocational rehabilitation evaluation was conducted by a multi-professional team in an out-patient clinic of a university hospital. The obtained descriptions were converted to ICF codes, the most frequent being compared with the ICF Checklist of the World Health Organization (WHO) and the ICF Comprehensive and Brief Core Sets suggested by the ICF Research Branch. RESULTS: In the study population (53 % women), 141 ICF codes were identified with a preciseness of three or more digits, the average being 21 codes/subject (median 20.0, range 9-40). When truncated to three digits, 84 ICF codes remained (average 18 codes/subject, range 9-25), 45 of which appeared in over 10 % of the study population, 24 also being found in the ICF Comprehensive, 5 in the ICF Brief Core Sets, and 33 in the WHO ICF Checklist. CONCLUSIONS: The list of most frequent ICF codes retrospectively obtained in this study from unstandardised records showed a similarity with ICF Comprehensive and Brief Core Sets by ICF Research Branch and the ICF Checklist by WHO, but with a bias towards the identification of body structures and functions. The results support the use of ICF in vocational rehabilitation evaluation to ensure comprehensiveness of evaluation. The ICF Comprehensive Core Set seems to be the most useful for the needs of multiprofessional team when assessing functioning of patients.

[Has participants' selection in an early VOMR changed in 2000's?]. / Ammatillisesti syvennettyyn lääketieteelliseen kuntoutukseen (ASLAK) pääsy 2000-luvulla.

The purpose of this prospective study was to investigate how well the selection process to vocationally oriented medical rehabilitation (VOMR) has succeeded in 2000's to identify persons under an elevated risk of work disability. Data were collected from responses to survey and national health registers. There were only small or no associations between studied risk factors and employees' chances to be selected to VOMR without significant differences between three sub-cohorts (N=44056-44980) which were formed based on the time of response to survey. Apparently failed selection may weaken the effectiveness of this common Finnish rehabilitation.

Effect of a multidisciplinary rehabilitation programme on perceived health among employees at increased risk of incapacity for work: a controlled study.

OBJECTIVE: To evaluate the effect of a four-week primary prevention programme on change in perceived health among employees at increased risk of incapacity for work. DESIGN: A follow-up controlled study. SETTINGS: The data were collected from survey responses and registered data on demographic, work and health characteristics, and health-related behaviours. SUBJECTS: Eight hundred and seventy-two participants and their 2440 propensity score-matched controls. INTERVENTION: Multidisciplinary preventive programme of physical training and psychological education to adopt a healthier lifestyle, and to achieve greater aerobic capacity, muscle strength and endurance, as well as better self-management of stress. MAIN MEASURES: Psychological distress, anxiety and suboptimal self-rated health. RESULTS: The prevalence of suboptimal self-rated health, psychological distress and anxiety did not differ between the participants and controls before the intervention (22.6% vs. 22.8%, 26.6% vs. 29.0%, and 33.0% vs. 33.8%, respectively). Similarly, after the intervention, there were no group differences in the prevalence of self-rated health problems at the time of the short-term (mean 1.7 years, up to 4.6 years) or long-term (mean 5.8 years, up to 9.2 years) follow-up. Figures for prevalence of suboptimal self-rated health, psychological distress and anxiety in participants and controls at the time of the long-term follow-up were 33.8% vs. 28.9%, 25.1% vs. 24.9%, and 34.7% vs. 33.2%, respectively. CONCLUSIONS: No beneficial effects on perceived health were observed for a four-week primary prevention programme widely used in Finland to reduce early retirement on health grounds.

Psychometric properties of 12-item self-administered World Health Organization disability assessment schedule 2.0 (WHODAS 2.0) among general population and people with non-acute physical causes of disability - systematic review.

OBJECTIVE: WHODAS 2.0 is a unified scale to measuring disability across diseases, countries, and cultures. The objective was to explore the available evidence on the psychometric properties of 12-item self-administered WHODAS 2.0 among a general population and people with non-acute physical causes of disability. METHODS: Five databases Medline, Embase, Web of Science, Scopus, and PsycINFO were searched for papers related to the validity, reliability, responsiveness, minimal clinically important difference or minimal detectable change of 12-item self-administered WHODAS 2.0. In order to avoid missing any potentially relevant studies, the search clauses were left as generic as possible and the refining search was conducted manually. As the review was focusing on chronic physical disorders and general adult population, major psychiatric diagnoses, acute traumas, other acute conditions (e.g., postpartum or pregnancy), hearing loss, progressive neurological disorders, and age <19 years were excluded. The relevancy of the studies was assessed by two independent reviewers. RESULTS: The 14 out of 191 observational studies were considered relevant. The sample sizes varied from 80 up to 31,251 participants. Great diversity was observed in the participants' health problems. The Cronbach's alpha was high - up to 0.96. The correlations between WHODAS 2.0 and other disability scales were high. Substantial floor without ceiling effect was reported by two studies. Exploratory factor analysis resulted in a multidimensional structure - up to five factors. The discriminative ability and test-retest reliability of the scale was good. CONCLUSIONS: It seems, that the 12-item self-administered WHODAS 2.0 is internally consistent and a reliable scale demonstrating overall good correlation with other measures of disability. However, it appears that it is a multidimensional scale and its total score may represent different combinations of several contributing factors. Thus, the 12-item WHODAS 2.0 can be more reliable when creating a person's functional profile formed by the 12 individual item scores instead of a single total sum.IMPLICATIONS FOR REHABILITATIONThe 12-item self-administered WHODAS 2.0 is internally consistent and a reliable scale demonstrating overall good correlation with other measures of disability.It appears that it is a multidimensional scale and its total score may represent different combinations of several contributing factors.The 12-item WHODAS 2.0 can be more reliable when creating a person's functional profile formed by the 12 individual item scores instead of a single total sum.