Psychometric properties of the Mini-Mental State Examination in patients with acquired brain injury in Turkey.

OBJECTIVE: To evaluate the psychometric properties of Mini-Mental State Examination (MMSE) in patients with acquired brain injury in Turkey. METHODS: A total of 207 patients with acquired brain injury were assessed. Reliability was tested by internal consistency and the person separation index; internal construct validity by Rasch analysis; external construct validity by correlation with cognitive disability; and cross-cultural validity by differential item functioning analysis compared with Italian MMSE data. RESULTS: Reliability was adequate with a Cronbach's alpha of 0.75 and person separation index of 0.76. After collapsing some categories, and adjustment for differential item functioning, internal construct validity was supported by fit of the data to Rasch model. Differential item functioning for culture was found in 2 items and after adjustment, data could be pooled between Turkey and Italy. External construct validity was supported by expected associations. CONCLUSION: The Turkish version of the Mini-Mental State Examination can be used as a cognitive screening tool in acquired brain injury. Cross-cultural validity between Italy and Turkey is supported, given appropriate adjustment for differential item functioning. However, shortfalls in reliability at the individual level, as well as the presence of differential item functioning suggest that a better instrument should be developed to screen for cognitive deficits following acquired brain injury.     

ADL assessment of nondisabled Turkish children with the WeeFIM instrument

OBJECTIVE: To evaluate the WeeFIM instrument's reliability and internal construct validity for the Turkish child population. DESIGN: License was taken from UDSmr to use the WeeFIM instrument. For the reliability and validity studies of the Turkish translation of the WeeFIM instrument, 573 Turkish nondisabled children were included in the study. The reliability of the instrument was assessed by Cronbach's alpha coefficient, intraclass correlation coefficient (ICC), and test-retest reliability. Internal construct validity was assessed by both using Rasch unidimensional measurement model and testing for differential item functioning for age and gender. RESULTS: Cronbach alpha value was 0.99 for motor WeeFIM rating and 0.99 for cognitive WeeFIM rating. ICC was 0.81 for motor WeeFIM rating and 0.92 for cognitive WeeFIM rating. The internal construct validity of the Turkish translation of the WeeFIM instrument was confirmed by excellent fit to the Rasch measurement model. Two subscales were found from the principal component analysis of standardized residual correlation for items. Among the items, bowel management, bladder management, eating, and comprehension showed considerable levels of misfit. CONCLUSIONS: The Turkish translation of the WeeFIM instrument is valid, reliable, and practical for the Turkish child population. Further studies are required to determine the cross-cultural validity of the instrument.     

Validity and reliability of the Turkish translation of the Pediatric Evaluation of Disability Inventory (PEDI)

PURPOSE: To investigate the validity and reliability of the Turkish translation of the original Pediatric Evaluation of Disability Inventory (PEDI). METHOD: On May 2003, we received permission from Boston University to translate and use the PEDI for Research purposes. PEDI Functional Skills scale and Caregiver Assistance scale was administered by physiatrists to 573 healthy Turkish children (295 males and 278 females; the age range: 7 months to 7(1/2) years) in two different healthcare centres in Ankara. The Turkish translation of the PEDI was again administered to 102 children after five days in order to assess test-retest reliability. Intraclass correlation coefficients (ICC) and Cronbach's alphas (alpha) were calculated. The test-retest reliability was assessed by Spearman's correlation coefficient. Internal construct validity was assessed by using Rasch unidimensional measurement model. RESULTS: High Cronbach's alpha coefficients (> or =0.98), high ICC values (> or =0.96) and high Spearman correlation coefficients (> or =0.86) were found. The internal construct validity was confirmed by good fit to the Rasch measurement model. The fit statistics conducted in the study was acceptable, except for some items. CONCLUSIONS: The Turkish translation of the PEDI is valid and reliable for the Turkish child population. We believe that PEDI is a detailed and useful instrument for the evaluation of efficiency of pediatric rehabilitation programme.     

Construct validity and reliability of the Rivermead Post-Concussion Symptoms Questionnaire

OBJECTIVES: To provide further evidence of reliability and internal and external construct validity of the Rivermead Post-Concussion Symptoms Questionnaire (RPQ), which measures severity of postconcussion symptoms following head injury. DESIGN AND SETTING: A cross-sectional study of consecutive patients presenting with a head injury in two urban teaching hospitals and a community trust. PATIENTS: Three hundred and sixty-nine patients returned a questionnaire from 1689 consecutive adult patients (18 years and above) referred to radiology for a skull X-ray following a head injury, and those who were currently under the care of a community-based multidisciplinary head injury team. METHOD: Internal construct validity tested by fit to the Rasch Measurement model; external construct validity tested by correlations with Rivermead Head Injury Follow-up Questionnaire (RHFUQ); test-retest reliability tested by correlations at two-week intervals. OUTCOME MEASURES: Rivermead Post-Concussion Symptoms Questionnaire and Rivermead Head Injury Follow-up Questionnaire. MAIN RESULTS: RPQ scores ranged from 0 to 64 (17.3% floor, 0.3% ceiling). Overall fit to the Rasch model was poor (item fit mean -0.416, SD = 1.989, chi-squared= 172.486, p<0.01) suggesting a lack of unidimensionality. The items headaches, dizziness and forgetful displayed misfitting residuals and the first two items also displayed significant item trait fit statistics (p < 0.0006). After removing the items headaches, dizziness and subsequently nausea the RPQ demonstrated good fit at overall and individual item levels, both for the remaining 13 items (RPQ-13) and the three items (RPQ-3) which now formed a subsidiary scale. All items functioned consistently across age and gender. The RPQ-13 and RPQ-3 scales showed test-retest reliability coefficients of 0.89 and 0.72 (both p-values < 0.01) and positive correlations with RHFUQ scores (0.83 for RPQ-13, 0.62 for RPQ-3, both p-values < 0.01). CONCLUSIONS: As currently used, the RPQ does not meet modern psychometric standards. Its 16 items do not tap into the same underlying construct and should not be summated in a single score. When the RPQ is split into two separate scales, the RPQ-13 and the RPQ-3, each set of items forms a unidimensional construct for people with head injury at three months post injury. These scales show good test-retest reliability and adequate external construct validity.     

Validity and reliability of the Turkish translation of the Pediatric Evaluation of Disability Inventory (PEDI)

Purpose. To investigate the validity and reliability of the Turkish translation of the original Pediatric Evaluation of Disability Inventory (PEDI).

Method. On May 2003, we received permission from Boston University to translate and use the PEDI for Research purposes. PEDI Functional Skills scale and Caregiver Assistance scale was administered by physiatrists to 573 healthy Turkish children (295 males and 278 females; the age range: 7 months to 7½ years) in two different healthcare centres in Ankara. The Turkish translation of the PEDI was again administered to 102 children after five days in order to assess test-retest reliability. Intraclass correlation coefficients (ICC) and Cronbach's alphas (α) were calculated. The test-retest reliability was assessed by Spearman's correlation coefficient. Internal construct validity was assessed by using Rasch unidimensional measurement model.

Results. High Cronbach's α coefficients (≥0.98), high ICC values (≥0.96) and high Spearman correlation coefficients (≥0.86) were found. The internal construct validity was confirmed by good fit to the Rasch measurement model. The fit statistics conducted in the study was acceptable, except for some items.

Conclusions. The Turkish translation of the PEDI is valid and reliable for the Turkish child population. We believe that PEDI is a detailed and useful instrument for the evaluation of efficiency of pediatric rehabilitation programme.     

The use of Rasch measurement to improve the Oswestry classification scheme

OBJECTIVES: To use Rasch measurement to assess and modify the original classification categories of the Oswestry Low Back Pain Disability Questionnaire (Oswestry), to examine the hypothesis that the items from the Oswestry form a unidimensional construct and a hierarchical representation of low back pain (LBP) disability, and to compare ordinal Likert resultant scores to interval Rasch scaled scores with disability categories serving as a framework. DESIGN: Rasch analysis model. Existing Oswestry admission data generated by FOTO were analyzed. SETTING: Statistical analysis of sample database. PARTICIPANTS: A sample of 942 patients with LBP referred for physical therapy between 1993 and 1994. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Construct validity; disability categories (as assessed by Likert and Rasch models); and fit statistics (infit, outfit as mean squares). RESULTS: All items from the Oswestry except the pain item fit the Rasch model. Construct validity of the scale using the Rasch model required the structure of the rating scale to be modified from 6 response levels to 4. A hierarchical representation of LBP disability was supported. A comparison of the disability categories based on Likert and Rasch scaling revealed them to be nonequivalent. The new scaling changed the disability categories for 44% of patients. CONCLUSION: Rasch analysis produced disability categories in the Oswestry that are linear and, therefore, useful for quantitatively assessing self-reported disability levels.     

Validation of the Middlesex Elderly Assessment of Mental State (MEAMS) as a cognitive screening test in patients with acquired brain injury in Turkey

PURPOSE: Assessment of cognitive impairment with a valid cognitive screening tool is essential in neurorehabilitation. The aim of this study was to test the reliability and validity of the Turkish-adapted version of the Middlesex Elderly Assessment of Mental State (MEAMS) among acquired brain injury patients in Turkey. METHODS: Some 155 patients with acquired brain injury admitted for rehabilitation were assessed by the adapted version of MEAMS at admission and discharge. Reliability was tested by internal consistency, intra-class correlation coefficient (ICC) and person separation index; internal construct validity by Rasch analysis; external construct validity by associations with physical and cognitive disability (FIM); and responsiveness by Effect Size. RESULTS: Reliability was found to be good with Cronbach's alpha of 0.82 at both admission and discharge; and likewise an ICC of 0.80. Person separation index was 0.813. Internal construct validity was good by fit of the data to the Rasch model (mean item fit -0.178; SD 1.019). Items were substantially free of differential item functioning. External construct validity was confirmed by expected associations with physical and cognitive disability. Effect size was 0.42 compared with 0.22 for cognitive FIM. CONCLUSION: The reliability and validity of the Turkish version of MEAMS as a cognitive impairment screening tool in acquired brain injury has been demonstrated.     

The Foot Posture Index: Rasch analysis of a novel, foot-specific outcome measure

OBJECTIVE: To investigate the internal construct validity of a clinician-assessed measure of foot position, the Foot Posture Index (FPI), versions FPI-8 and FPI-6. DESIGN: Rasch analysis of baseline FPI scores from studies conducted during the development of the instrument. SETTING: A community-based and a hospital-based study, conducted at 2 institutions. PARTICIPANTS: Measures were obtained from 143 participants (98 men, 45 women; age range, 8-65y). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Rasch analysis was undertaken using RUMM2020 software in order to evaluate the following properties of the FPI: unidimensionality of each item included in the FPI, the differential item functioning (DIF) of each item, and item and person separation indices. RESULTS: In the developmental draft of the instrument, the 8-item FPI-8 showed some misfit to the Rasch model (chi(16)(2) test=27.63, P=.03), indicating lack of unidimensionality. Two items were identified as problematic in the Rasch modeling: Achilles' tendon insertion (Helbing's sign), which showed illogical response ordering and "congruence of the lateral border of the foot," which showed misfit, indicating that this item may be measuring a different construct (chi(2)(2) test=15.35, P<.01). All FPI-8 items showed an absence of DIF, and the person separation index (PSI) was good (PSI=.88). The revised FPI-6, which does not include the 2 problematic items, showed unidimensionality (chi(12)(2) test=11.49, P=.49), indicating a good overall fit to the model, and improvement over the preliminary version. With the removal of the 2 problematic items, there were no disordered thresholds; all items remained DIF free and all individual items displayed a good fit to the model. The person-separation index for the FPI was similar for both the 8-item (FPI-8=.880) and 6-item (FPI-6=.884) versions. CONCLUSIONS: The original FPI-8 showed significant mismatching to the model. The 2 items in the FPI-8 that were identified as problematic in clinical validation studies were also found to be contributing to the lack of fit to the Rasch model. The finalized 6-item instrument showed good metric properties, including good individual item fit and good overall fit to the model, along with a lack of differential item functioning. This analysis provides further evidence for the validity of the FPI-6 as a clinical instrument for use in screening studies and shows that it has the potential to be analyzed using parametric strategies.     

Rasch validation of the Arabic version of the lower extremity functional scale

Purpose: The purpose of this study was to examine the internal construct validity of the Arabic version of the Lower Extremity Functional Scale (20-item Arabic LEFS) using Rasch analysis.

Methods: Patients (n?=?170) with lower extremity musculoskeletal dysfunction were recruited. Rasch analysis of 20-item Arabic LEFS was performed. Once the initial Rasch analysis indicated that the 20-item Arabic LEFS did not fit the Rasch model, follow-up analyses were conducted to improve the fit of the scale to the Rasch measurement model. These modifications included removing misfitting individuals, changing item scoring structure, removing misfitting items, addressing bias caused by response dependency between items and differential item functioning (DIF).

Results: Initial analysis indicated deviation of the 20-item Arabic LEFS from the Rasch model. Disordered thresholds in eight items and response dependency between six items were detected with the scale as a whole did not meet the requirement of unidimensionality. Refinements led to a 15-item Arabic LEFS that demonstrated excellent internal consistency (person separation index [PSI]?=?0.92) and satisfied all the requirement of the Rasch model.

Conclusion: Rasch analysis did not support the 20-item Arabic LEFS as a unidimensional measure of lower extremity function. The refined 15-item Arabic LEFS met all the requirement of the Rasch model and hence is a valid objective measure of lower extremity function. The Rasch-validated 15-item Arabic LEFS needs to be further tested in an independent sample to confirm its fit to the Rasch measurement model.

• Implications for Rehabilitation

• The validity of the 20-item Arabic Lower Extremity Functional Scale to measure lower extremity function is not supported.

• The 15-item Arabic version of the LEFS is a valid measure of lower extremity function and can be used to quantify lower extremity function in patients with lower extremity musculoskeletal disorders.

     

Rasch Analysis of the International Quality of Life Basic Data Set Version 2.0

ObjectiveTo examine the internal construct validity of the International Spinal Cord Injury Quality of Life Basic Data Set Version 2.0 (QoL-BDS V2.0) and compare this with the internal construct validity of the original version of the QoL-BDS.DesignInternational cross-sectional psychometric study.SettingSpinal rehabilitation units, clinics, and community.ParticipantsThe study involved 5 sites and 4 countries, 2 of whose primary language is not English. Each site included a consecutive sample of inpatients with spinal cord injury or disease (SCI/D) and a convenience sample of individuals with SCI/D living in the community (N=565).Main Outcome MeasuresThe QoL-BDS V2.0 consists of the 3 original items on satisfaction with life as a whole, physical health, psychological health of the QoL-BDS, and an additional item on satisfaction with social life. All 4 items are answered on a 0-10 numeric rating scale. Rasch analysis was performed on versions 1.0 and 2.0 of the QoL-BDS to examine the ordering of the items’ response options, item scaling, reliability, item fit, local item independence, differential item functioning, and unidimensionality.ResultsThe sample included 565 participants with 57% outpatients and 43% inpatients. Mean age was 51.4 years; 71% were male; 65% had a traumatic injury, 40% had tetraplegia, and 67% were wheelchair users. Item thresholds were collapsed for ordering, and subsequent analyses showed good internal construct validity for the QoL-BDS V2.0 with a person separation reliability of 0.76 and Cronbach α of 0.81. Infit and outfit statistics ranged 0.62-0.91. No local dependencies and multidimensionality were found. Differential item functioning was observed only for country and inpatients vs outpatients but not for other participants’ characteristics. Differences in internal construct validity between the 3-item and 4-item versions were minimal.ConclusionsThe results of this Rasch analysis support the internal construct validity of the QoL-BDS V2.0.     

Validation of the Middlesex Elderly Assessment of Mental State (MEAMS) as a cognitive screening test in patients with acquired brain injury in Turkey

Purpose. Assessment of cognitive impairment with a valid cognitive screening tool is essential in neurorehabilitation. The aim of this study was to test the reliability and validity of the Turkish-adapted version of the Middlesex Elderly Assessment of Mental State (MEAMS) among acquired brain injury patients in Turkey.

Methods. Some 155 patients with acquired brain injury admitted for rehabilitation were assessed by the adapted version of MEAMS at admission and discharge. Reliability was tested by internal consistency, intra-class correlation coefficient (ICC) and person separation index; internal construct validity by Rasch analysis; external construct validity by associations with physical and cognitive disability (FIM); and responsiveness by Effect Size.

Results. Reliability was found to be good with Cronbach's α of 0.82 at both admission and discharge; and likewise an ICC of 0.80. Person separation index was 0.813. Internal construct validity was good by fit of the data to the Rasch model (mean item fit ?0.178; SD 1.019). Items were substantially free of differential item functioning. External construct validity was confirmed by expected associations with physical and cognitive disability. Effect size was 0.42 compared with 0.22 for cognitive FIM.

Conclusion. The reliability and validity of the Turkish version of MEAMS as a cognitive impairment screening tool in acquired brain injury has been demonstrated.     

Rasch validation and predictive validity of the action research arm test in patients receiving stroke rehabilitation

Chen H-F, Lin K-C, Wu C-Y, Chen C-L. Rasch validation and predictive validity of the Action Research Arm Test in patients receiving stroke rehabilitation.ObjectiveTo validate the internal construct and predictive validity of the Action Research Arm Test (ARAT).DesignSecondary study.SettingSeven medical centers.ParticipantsPatients with stroke (N=191).InterventionsNot applicable.Main Outcome MeasureThe internal construct validity of the ARAT score at pretreatment was examined using Rasch analysis. The predictive validity was examined by the correlations between performance on the ARAT before treatment and scores on the Wolf Motor Function Test, the Motor Activity Log, and the Stroke Impact Scale after treatment.ResultsThe 4-point ARAT scale had a disordered rating scale structure. Further Rasch modeling suggested revising the original 4-point scale into a 3-point scale. The 19 items measured 1 construct. The item difficulty hierarchy indicated that excluding the gross subtest, a score of 3 on the first item of any other subtest indicated the highest motor ability, and a score of 1 (the revised lowest rating) on the second item indicated the lowest motor ability. Tasks of “place hand behind head” and “place hand on top of head” showed poor item fit and item bias relevant to participants' ages. The ARAT items can reliably separate participants into 5.44 strata. Moderate to good correlations indicated good predictive validity.ConclusionsThe ARAT possesses good psychometric properties in stroke patients with mild to moderate motor severity and without severe cognitive impairment, and has evidence of unidimensionality, predictive validity, and reliability. The revised 3-point rating scale is recommended when the ARAT is administered on this population. The “place hand behind head” and “place hand on top of head” tasks misfit the Rasch model's expectations. Future studies are needed in the use of the ARAT on stroke patients with different levels of motor severity or with cognitive impairment.     

Measuring disability in Medicare home care patients: application of Rasch modeling to the outcome and assessment information set

BACKGROUND: The Outcome and Assessment Information Set (OASIS) is the universal clinical assessment tool for adult nonmaternity patients receiving skilled care at home from Medicare-certified home health agencies in the United States. Anticipating increased use of OASIS data for research purposes, this article explored the usefulness of Rasch modeling to address disability measurement challenges presented by the unique response category structure of the seven activities of daily living (ADL) and eight instrumental ADL (IADL) items in the OASIS. OBJECTIVES: To illustrate how Rasch model statistics can be used to evaluate OASIS ADL and IADL item unidimensionality and model fit; to illustrate how Rasch modeling simultaneously estimates ADL and IADL item difficulty, thresholds between item response categories, and person disability; and to compare Rasch estimates of item difficulty and person disability scores to estimates based on more conventional Likert scoring techniques. SUBJECTS: Medicare-eligible home health care patients (n = 583) served by one of 12 home care agencies in Ohio between November 1999 and September 2000. MEASURES: ADL and IADL items were measured three ways: according to the original OASIS scoring (raw Likert); transformed raw Likert scores accounting for the nonuniform item structure (corrected Likert); and Rasch Partial Credit model scores. RESULTS: The items bathing and telephone use showed evidence of unexpected response patterns; recoding of these items was necessary for good Rasch model fit. Partial Credit model results revealed that interval distances between response categories varied widely across the 15 ADL and IADL items. When ADL and IADL items were ranked by level of difficulty, results were similar between Rasch and corrected Likert measurement approaches; however, corrected Likert person scores were found to be nonlinear at highest and lowest disability levels when plotted against Rasch person scores. CONCLUSIONS: Rasch modeling can help improve the precision of disability measurement in Medicare home care patients when using ADL and IADL items from the OASIS instrument.     

Reliability and Validity of the Turkish Version of the Abiloco-Kids

ABILOCO-Kids is a scale that assesses the walking ability of children with Cerebral Palsy (CP) from the viewpoint of parental perception. The aim of this study was to translate the ABILOCO-Kids scale into Turkish and to establish its reliability and validity in children with CP. Turkish children were recruited in this study. ABILOCO-Kids is a scale developed by Caty and et al. This scale assess the walking ability of children with CP focusing on the activity domain of the International Classification of Functioning, Disability and Health (ICF). The ABILOCO-Kids scale was translated from English into Turkish using the forward-backward-forward method. The motor functions of the 63 children participating in the study were evaluated by the Gross Motor Function Classification System (GMFCS) and the Gross Motor Function Measurement-88 (GMFM-88). The ABILOCO-Kids scale was repeated in 30 children after one week to establish test-retest reliability. While internal and external construct validity were investigated using Rasch analysis and Spearman correlation coefficient, respectively; reliability was evaluated in terms of internal consistency by Cronbach’s alpha and Person Separation Index (PSI). All items of the ABILOCO-Kids were found to fit the Rasch Model (chi-square 14.35 (df?=?20), p?=?0.813). The internal construct validity was good, overall mean item fit residual was ?0.109 (SD: 0.719) and mean person fit residual was ?0.215 (SD: 0.817). The reliability was good with Cronbach’s Alpha of 0.98 and PSI of 0.99. When the test-retest was examined via Differential Item Functioning (DIF) by time, none of the items showed DIF. Spearman correlation coefficients of the ABILOCO-Kids scale in relation to the GMFM and GMFCS were r?=?0.824, p?<?0.001; r?=??0.788, p?<?0.001 respectively. The Turkish version of the ABILOCO-Kids scale is a valid, reliable and unidimensional scale for children with CP. This scale will allow the differences in the locomotion of children with CP to be evaluated from the perspective of the family.     

Evaluation of the psychometrics of the Social Impact Scale: a measure of stigmatization

As stigmatization has a large impact on patients, therapists need a measure of this impact to provide patients with adequate services. This study, therefore, examined the reliability and validity of the Social Impact Scale (SIS) when applied to three groups of individuals diagnosed with major depression, schizophrenia, or HIV/AIDS. The study sample (N=580) included 237 patients with depressive disorder, 119 with schizophrenia, and 224 with HIV/AIDS. Of these, 56% were men, 45.5% had an elementary school education or less, 48% were employed, and 56% were single. The Rasch measurement model, an item-response theory, was used to analyze the SIS structure and quality. The Rasch model solves several statistical problems of traditional measurement theory, such as misuse of ordinal data as interval data and sample dependence. Rasch analysis indicated that the 24 items of the SIS fit the measurement model. The match between item difficulties and person abilities was adequate. All items showed acceptable rating scale structure. The separation reliability of the scale reached 0.99. The SIS had acceptable psychometric qualities in terms of internal consistency, item validity, person validity, sensitivity, and concurrent validity when applied to patients with depression, schizophrenia, and HIV/AIDS in Taiwan.     

Rasch analysis of three versions of the Oswestry Disability Questionnaire

The purpose of the study was to explore the construct validity of three versions of the Oswestry Disability Questionnaire for low back pain using Rasch analysis. The three versions of the ODQ share 9 items and differ on one other. About 100 patients with non-specific low back pain seeking physiotherapy treatment at hospital outpatient departments and physiotherapy private practices completed the 12 Oswestry items as part of a battery of questionnaires. Rasch analysis revealed that four items (Personal Care, Standing, Sex Life and Social Life) had disordered response thresholds and one item (Walking) showed differential item functioning by age. The 10 standard Oswestry items and a modified version in which Sex Life is replaced by Work/Housework showed adequate overall fit to the Rasch model (chi(2)P>.01). The third version, in which Sex Life is replaced by Changing Degree of Pain, did not fit the model (chi(2)P=.006) and the Changing Degree of Pain item was misfitting (residual 2.34, P=.007). These findings suggest that either of the first two of the three versions of this widely used low back pain outcome measure should be selected over the third. Users should also be aware that for some items the rating scale steps do not perform as intended.     

Validity and reliability study of the Turkish version of Health Belief Model Scale in diabetic patients

BACKGROUND: Diabetes mellitus (DM) is an important health problem that leads to severe complications, is the cause of early death, and is showing an increase in frequency. The development of positive health behaviors is extremely important in the treatment of diabetic patients. There are various models that examine the health behaviors of individuals. One of these is the Health Belief Model. This model is very beneficial in explaining factors that affect patients' compliance with their disease. PURPOSE: This research was planned to measure the validity and reliability of the Health Belief Model Scale in diabetic patients in the Turkish population. DESIGN: Questionnaire Survey. SETTINGS: The research population was all of the diabetic patients (4,125) registered with the Turkish Diabetes Society, Denizli Province, Turkey. PARTICIPANTS: A convenience sample was composed of 352 patients with Type 2 DM. METHODS: The research data were collected with three tools, a "sociodemographic data form" related to the diabetic patients, the "Health Belief Model Scale in Diabetic Patients," and the "Diabetes Management Self-Efficacy Scale."For validity studies: language validity, content validity, concurrent validity and construct validity were examined. For reliability studies: the tool's internal consistency reliability, Cronbach alpha reliability coefficient, test-retest reliability were examined. RESULTS: The tool's internal consistency reliability subscales' Cronbach alpha coefficient values ranged from 0.73 to 0.86. For the total tool a Cronbach alpha value of 0.89 was found. In the tool's internal consistency reliability total item correlation the three items that were below 0.30 were removed and the 36 items were reduced to 33 items. The tool's test-retest reliability was 0.90. According to factor analysis the tool contains five subscales of perceived susceptibility, perceived severity, perceived benefits, perceived barriers and recommended healthy behaviors. CONCLUSION: The Health Belief Model Scale in diabetic patients was determined to be valid and reliable for use in the Turkish population.     

Development and validation of a tool to assess self-efficacy for competence in interprofessional collaborative practice

ABSTRACT

Although interprofessional education and collaborative practice have gained increasing attention over the past five decades, development of rigorous tools to assess related competencies is still in infancy. The purpose of this study was to develop an instrument to evaluate health professions students’ self-efficacy in interprofessional collaborative competency and to assess the instrument’s psychometric properties. We developed a new instrument based on the Interprofessional Education Collaborative’s (IPEC) Core Competencies for Interprofessional Collaborative Practice. In a cross-sectional study design, 660 students from 11 health programmes at an urban university in the Midwest USA completed the Interprofessional Education Collaborative Competency Self Efficacy Tool (IPECC-SET). Rasch analysis evaluated the following: (1) functioning of the instrument; (2) fit of items within each subscale to a unidimensional construct; (3) person-response validity; (4) person-separation reliability; and (5) differential item functioning in relation to gender and ethnicity. After removing seven items with suboptimal fit, each subscale demonstrated high internal validity. Two items demonstrated differential item functioning (DIF) for “Gender” and none for “Race/Ethnicity.” Our findings provide early evidence of IPECC-SET as a valid measure of self-efficacy for interprofessional competence for health professions students. Additional research is warranted to establish external validity of the new instrument by conducting studies across institutions.     

A New Objective Health Numeracy Test for Patients with Type 2 Diabetes: Development and Evaluation of Psychometric Properties

PurposePatients with diabetes frequently need to perform certain numeric tasks such as interpreting blood glucose levels. However, there is no psychometrically sound instrument for objectively measuring diabetes-specific health numeracy. This study aimed to develop a new objective diabetes health numeracy test (DHNT) and evaluate its psychometric properties in adult patients with type 2 diabetes.MethodsAn instrument development study was conducted. Initial items were evaluated by six experts for content validity. After a pilot test, a convenience sample of 257 participants with type 2 diabetes was recruited at 2 university hospitals from May to September 2018. The structural, convergent, and criteria validity, and internal consistency of the DHNT with binary item responses were evaluated. Data were analyzed using exploratory factor analysis, Rasch analysis, tetrachoric correlation, Spearman's correlation, and the Kuder–Richardson-20 formula.ResultsExploratory factor analysis yielded a single-factor solution comprising seven items. Rasch analysis confirmed that no item did not fit with the single factor and identified that the item difficulty parameters had moderate values. The convergent and criterion validity of the instrument were demonstrated, with diabetes knowledge and subjective diabetes numeracy, respectively, as was its acceptable internal consistency, by a Kuder–Richardson-20 coefficient of .81.ConclusionThe DHNT demonstrated satisfactory psychometric properties. The instrument with moderate levels of item difficulty may have a lower cognitive burden. The developed instrument can be applied in practice to tailor the education of diabetes self-management as per the levels of health numeracy of specific patients.     

Development and validation of the GP frequency of interprofessional collaboration instrument (FICI-GP) in primary care

Existing validated measures of pharmacist-physician collaboration focus on measuring attitudes toward collaboration and do not measure frequency of interactions that comprise actual collaborative behavior. Therefore, the aim of this study was to develop and validate an instrument to measure the frequency of collaboration between general practitioners (GPs) and pharmacists from the GP's perspective. An 11-item Frequency of Interprofessional Collaboration Instrument for GPs (FICI-GP) was developed and administered to 1118 GPs in eight divisions of general practice in New South Wales, Australia. Two hundred and fifty-eight (23%) GP surveys were completed and returned. Principal component analysis suggested removal of one item for a final one-factor solution. The refined 10-item FICI-GP had a Cronbach's alpha of 0.87. After collapsing the original five-point response scale to a three-point response scale, the refined FICI-GP demonstrated fit to the Rasch model. Criterion validity of the FICI-GP was supported by the correlation of FICI-GP scores with scores on a previously validated physician-pharmacist collaboration instrument as well as by predicted differences in FICI-GP scores between subgroups of respondents stratified on age, co-location with pharmacists and interactions during residency. The refined 10-item FICI-GP was shown to have good internal consistency, criterion validity and fit to the Rasch model.