Excellent Test-retest Reliability Research Articles

Translation and Validation of Edinburgh Handedness Inventory in Urdu Language for Cerebral Palsy

Aim: To translate and validate EHI in Urdu language. Methods: Non-probability convenient sampling approaches used in a descriptive cross-cultural validation research design. The study also included twenty parents of children with cerebral palsy and specialists in pediatric rehabilitation. An English professor or physician completed the back translation, while two separate multilingual translators translated EHI forward into Urdu. These translators were proficient in both Urdu and English. An expert panel committee created and approved the final version of EHI in Urdu. The consent of the guardian acquired beforehand, and confidentiality ensured. The SPSS version 21 used to input and analyzes the data, and a pretest sample of 150 people used1. Result: For reliability statistics, the mean age of participants was 40.4 with standard deviation of 15.994 and Cronbach alpha of EHI questionnaire after translation was 0.943 or after testing on parents of cerebral palsy patients was 0.964 andcontent validity also showed good content validity ratio which was 0.72. Pearson correlation showed an excellent test-retest reliability and internal consistency 0.946 and after testing intraclass correlation varied from 0.523 to 0.956-show high reliability respectively. Conclusion: The Urdu version of EHI is a valid and reliable tool for Urdu speaking population of Pakistan. Keywords: Cerebral palsy, Edinburgh handedness inventory, Ghurki trust teaching hospital, Lahore College of physical therapy

Cross‐cultural adaptation, validity, and reliability of the Turkish version of the Oral Behaviours Checklist

AbstractAimDetermining the occurrence of oral parafunctional behaviors is essential for the clinical management of temporomandibular disorders (TMDs). For this reason, the evaluation of parafunctional behaviors in patients with TMDs is highly important.MethodsThe purpose of the present study was to investigate the validity and reliability of the Turkish version of the Oral Behaviours Checklist (OBC‐T) in patients with TMDs. To determine the reliability of the questionnaire, it was applied in 142 patients with TMDs twice at a 2‐week interval. For concurrent validity of the OBC, Spearman correlation analysis was performed with Fonseca Anamnestic Index (FAI), Patient Health Questionnaire‐9 (PHQ‐9), Jaw Function Limitation Scale‐20 (JFLS‐20), and Tampa Scale for Kinesiophobia for TMDs (TSK‐TMDs).ResultsItems had good to excellent test–retest reliability. The OBC‐T score was correlated with FAI, JFLS‐20, PHQ‐9, and TSK‐TMDs scores.ConclusionThese results provided important evidence that the OBC‐T can be used to evaluate parafunctional behaviors in individuals with TMDs in Turkish‐speaking populations.

CAT (Comprehensive Assessment Tool) for Assessment of Functional Capacity of the Hand

Background: Hand function evaluations form an important element of extremity assessment, which helps to define the patient’s problem. Many functional hand evaluations described in the literature. However, cultural differences, expenses incurred, non-availability of Indian normative data makes clinical application of these tests difficult in Indian scenario. An attempt is made in the said study to construct an inexpensive, culture based, easy to administer, hand function test, which can be used for evaluation of the functioning of the upper extremity, for daily living tasks. Hence, the formulation of CAT (Comprehensive assessment tool) for evaluation of hand function. Objectives: To construct a simple, but comprehensive test for assessment of hand function. (CAT for hand function evaluation) 2. To check the reliability of the CAT test. Materials and methods: CAT test proforma was prepared based on available literature. The test that was constructed, consisted of 14 unilateral and 16 bilateral items. The study was conducted in the Occupational therapy department of a tertiary care hospital. Inclusion criteria were Normal, healthy individuals, between 20-60 years of age, with no known musculoskeletal upper extremity problems were recruited for the study. Total 30 people were evaluated on the newly constructed test and retested after a period of 3 weeks on the 30 test items after obtaining written informed consent. Standard method was employed while performance of the test. Scoring was done in time in seconds, and performance on CAT results noted. Results: Cronbach’s alpha values ranged from .798 to .976 suggesting excellent test-retest reliability for most test items. For bilateral test items, Cronbach’s alpha ranged from .573 to .941 suggesting from fair for some items and excellent test-retest reliability for most test items. Conclusion: The above findings suggest that the results of the CAT test are reproducible, hence CAT is a reliable test. Keywords: CAT test, Comprehensive test, Functional hand evaluation, Hand function

The oral and systemic health impact profile for periodontal disease (OSHIP-Perio)-Part 1: development and validation.

This study aimed to develop and validate the Oral and Systemic Health Impact Profile for Periodontal Disease (OSHIP-Perio), a disease-specific instrument for assessing the impact of periodontal disease on both general and oral health-related quality of life. A pool of 58 items, developed from the Oral Health Impact Profile (OHIP-49) and data generated through semi-structured patient interviews, was tested on 80 case subjects with periodontal disease and 80 control subjects. The dimensionality of the preliminary measure was evaluated using exploratory factor analysis (EFA). Rasch analysis was then performed on the primary dimension using the Winsteps software (Version 5.1.4.0) to render the final items for the OSHIP-Perio. The reliability and validity of the final OSHIP-Perio were subsequently determined. Using an EFA factor loading >0.50, the primary dimension comprised 18 items. Using Rasch analysis, four items were subsequently excluded. The final OSHIP-Perio with 14 items showed excellent test-retest reliability (overall intraclass correlation coefficient index = 0.99) and internal consistency (overall Cronbach's alpha coefficient = 0.96). It also exhibited good discriminant validity when case and control groups were compared (p < 0.001). It showed very strong correlations (rho coefficients >0.90) with the OHIP-5, OHIP-14 and OHIP-49, exhibiting good concurrent validity. It demonstrated a moderate correlation (rho coefficient = 0.60) with the global health rating, exhibiting a moderate convergent validity. The 14-item OSHIP-Perio exhibited good psychometric properties comparable to the OHIP-5, OHIP-14 and OHIP-49 for evaluating the impact of periodontal disease on quality of life.

Validity and reliability of the ERSA questionnaire in Turkish.

This methodological study aimed to assess the validity and reliability of the Turkish version of the Evaluation of the Impact of Hearing Loss in Adults (ERSA) questionnaire for individuals with treated hearing loss. The study involved 200 participants, and both exploratory factor analysis and confirmatory factor analysis were used to examine structural validity. External validity was assessed by correlating ERSA scores with the Abbreviated Profile of Hearing Aid Benefit (APHAB). Internal consistency and test-retest reliability were evaluated using Cronbach's alpha and the intraclass correlation coefficient, respectively. The Turkish ERSA demonstrated strong psychometric properties, with significant correlations between APHAB and ERSA scores and excellent internal consistency and test-retest reliability. The findings suggest that the Turkish ERSA is a valid and reliable tool for evaluating the impact of hearing loss in individuals.

The Perceived Economic Scarcity Scale: A valid tool with greater predictive utility than income.

This article introduces the Perceived Economic Scarcity Scale (PESS), a novel instrument measuring the subjective evaluation and experience of economic scarcity (the feeling of having insufficient financial resources to meet one's needs). We conducted three high-powered preregistered studies (total N = 1900) to rigorously evaluate the PESS's psychometric properties. In Study 1, we generated a pool of items and used both Principal Component Analysis and Exploratory Factor Analysis to select the most appropriate items. In Study 2, we examined the PESS's construct validity, demonstrating that it measures a distinct construct from related constructs such as subjective social class. In Study 3, we examined the PESS's predictive validity, demonstrating that it is a robust predictor of both affective outcomes (e.g. anxiety-depressive symptoms) and cognitive outcomes (e.g. economic risk-taking). Critically, we found that the PESS not only has incremental validity over and above income but also has greater predictive utility than income. We also found that the PESS score varies depending on the distance-to-pay and has excellent test-retest reliability. Overall, the PESS appears to be a valid and reliable instrument for assessing perceived economic scarcity, and we encourage researchers to use it to better understand the psychological consequences of 'not having enough'.

The development and validation of a needs assessment tool for use with YOUng adult survivors of a CentrAl Nervous system tumor (YOU-CAN).

Adolescent and young adult (AYA) survivors of a central nervous system (CNS) tumor represent a vulnerable group who can experience: social isolation, low rates of employment, and achieving independence can be compromised, leading to poorer quality of life compared with survivors of other cancer types. The aim of this study is to develop and evaluate the validity of a needs assessment tool (NAT) for AYA survivors of a CNS tumor. Items generated using data from 29 qualitative studies and cognitive interviews (n = 8) produced NAT V1.1 (49 items). 128 of 316 eligible participants attending neuro-oncology clinics at 4 NHS sites between June 2022 and March 2023 completed the NAT V1.1 to allow for item reduction and refinement and to evaluate reliability and validity. A pilot study (n = 6) using YOU-CAN in routine follow-up concluded the study. Hierarchical analysis and Rasch analysis identified 18- and 15-items for removal, respectively. YOU-CAN, comprised of the remaining 16 items, demonstrates excellent test-retest reliability (intra-class correlation coefficient, 0.901, n = 40) and sufficient correlation with the European Quality of Life questionnaire and Supportive Care Needs Survey (Pearson r = 0.433 and 0.590, respectively). Pilot testing showed YOU-CAN triggered discussions of unmet needs in consultations and highlighted the importance of multidisciplinary support. YOU-CAN is a valid and reliable instrument containing items related to concerns about physical and emotional health; family and relationships; self-acceptance; and independence. Future efforts should examine YOU-CAN's feasibility, and develop guidance for managing unmet needs. Routine use of YOU-CAN may improve the identification of otherwise undiscussed unmet needs and opportunities to deliver personalized support.

Test-Retest Reliability, Criterion-Related Validity, and Ecological Validity of the Test of Visual-Motor Skills, Third Edition, in Kindergarten Children With Developmental Coordination Disorder.

Establishing empirical evidence on the psychometric properties of the Test of Visual-Motor Skills (3rd ed.; TVMS-3) is helpful for guiding its use as an assessment of visual-motor integration (VMI) skills in kindergarten children with developmental coordination disorder (DCD). To investigate the test-retest reliability, criterion-related validity, and ecological validity of the TVMS-3 in Taiwanese kindergarten children with DCD. A nonexperimental, descriptive, correlational design. A hospital in Central Taiwan. Fifty-seven kindergarten children with DCD were recruited in the study. Intraclass correlation coefficient, percentage of minimal detectable change, and paired t test (Wilcoxon signed rank test) were used to investigate the test-retest reliability of the TVMS-3. The correlations (Pearson's r) between the TVMS-3 accuracy score and the scores of each of the four domains and the adaptive behavior composite score of the Vineland Adaptive Behavior Scales (3rd ed.; Vineland-3) were calculated, respectively, to examine criterion-related validity and ecological validity. The accuracy score of the TVMS-3 had excellent test-retest reliability and acceptable random measurement error. Moreover, it showed good criterion-related validity and sufficient ecological validity with the Vineland-3 in Taiwanese kindergarten children with DCD. The accuracy score of the TVMS-3 is applicable to Taiwanese kindergarten children with DCD in clinical and research settings. Plain-Language Summary: The accuracy score of the Test of Visual-Motor Skills (3rd ed.; TVMS-3) is a useful assessment tool to detect deficits in visual-motor integration for Taiwanese kindergarten children with developmental coordination disorder. The TVMS-3 has excellent test-retest reliability, good criterion-related validity, and sufficient ecological validity.

Fear of Movement in People with CRPS: A Psychometric Evaluation of the Tampa Scale-11 for Kinesiophobia.

People with complex regional pain syndrome (CRPS) commonly report a fear of movement that can worsen symptoms and increase disability. The Tampa Scale of Kinesiophobia (TSK) is used to evaluate fear of movement and (re)injury, but findings have been inconsistent in different populations. To evaluate the psychometric properties of the Persian version of TSK-11 in individuals with upper limb CRPS. Specifically, to determine if the factor structure aligns with the original two-factor model, consisting of "activity avoidance" and "somatic focus." People with CRPS (n=142, mean age=42, 54% female) completed the TSK. The psychometric testing included internal consistency and test-retest reliability (intra-class correlation coefficient), and convergent construct validity. Confirmatory and Exploratory factor analyses (CFA, EFA) were performed to evaluate the structural validity. The TSK-11 showed acceptable internal consistency (Cronbach alpha 0.93) and excellent test-retest reliability (ICC=0.93, 95% CI: 0.92 to 0.94). The Standard Error of Measurement and Minimal Detectable Change were 4.3 and 11.7, respectively. The results also demonstrated excellent criterion validity (r=0.81). CFA demonstrated that the original two-factor model did not fit. EFA derived a two-factor solution with different items. The factor structure accounted for 64.91% of the variance, and the internal consistency of the factors was acceptable (>0.90). Expert consensus suggested naming these two factors as Fear-avoidance, Magnification & Helplessness. The TSK-11 demonstrates excellent retest reliability in people with CRPS. The original two-factor structure was not confirmed, and a new 2-factor structure of the TSK-11 proposed consisting of subscales for Fear Avoidance beliefs and Magnification/Helplessness. Given the overlap between these constructs and the construct of pain catastrophizing, further study is needed to clarify both measures' content validity and relative uniqueness.

Validity and Reliability of the Korean Versions of the Food Allergy Quality of Life Questionnaire-Child Form and Teenager Form.

We aimed to assess the validity and reliability of the Korean versions of the Food Allergy Quality of Life Questionnaire-Child Form (K-FAQLQ-CF) and the Food Allergy Quality of Life Questionnaire-Teenager Form (K-FAQLQ-TF). Patients aged 8-17 years with food allergy (FA) were enrolled and completed the Korean versions of the questionnaires, including the K-FAQLQ-CF, the Food Allergy Independent Measure-Child Form (K-FAIM-CF), and the Pediatric Quality of Life Inventory™ (K-PedsQL™ 4.0) for children and the K-FAQLQ-TF, the Food Allergy Independent Measure-Teenager Form (K-FAIM-TF), and the K-PedsQL™ 4.0 for adolescents. We enrolled 56 children and 23 adolescents in this study. The K-FAQLQ-CF showed a good internal consistency (Cronbach's α coefficient = 0.969) and an excellent test-retest reliability (intraclass correlation coefficient = 0.914, P = 0.011). There was a moderate correlation between the K-FAQLQ-CF and K-FAIM-CF scores (β = 0.736, P < 0.001), indicating construct validity. The K-FAQLQ-CF score was weakly associated with the K-PedsQL™ 4.0 score (β = -0.289, P = 0.031), verifying convergent and discriminant validities. The K-FAQLQ-TF also showed a good internal consistency (Cronbach's α coefficient = 0.966) and test-retest reliability (intraclass correlation coefficient = 0.974, P = 0.005). Construct validity was also established by a moderate correlation with the K-FAIM-TF (β = 0.699, P < 0.001). Our results suggest that the K-FAQLQ-CF and K-FAQLQ-TF are valid and reliable tools to evaluate the quality of life of children and adolescents with FA in Korea.

Evaluation of reliability and validity of the Serbian Aphasia Screening Test.

A rise in strokes worldwide means that the number of people affected by aphasia is increasing. Early and accurate diagnosis of aphasia is crucial for recovery. Presently, there are no dedicated screening tests tailored for evaluating aphasia in Serbian-speaking individuals. This paper presents and describes the psychometric properties of the Serbian Aphasia Screening Test (SAST), a novel aphasia screening tool designed specifically for Serbian speakers. This initiative fills the gap in aphasia assessment tools for the Serbian population, providing a comprehensive and culturally sensitive approach to the evaluation of language disorders. Data using the SAST were collected from 240 participants: 120 Serbian speakers with aphasia after stroke compared to 120 neurotypical individuals. The assessment included the following subtests: conversation, verbal automatized sequences, auditory comprehension, visual confrontation naming, responsive naming, repetition of words, repetition of sentences, oral word reading, oral sentence reading, reading comprehension, and writing. The main objectives were to ascertain the psychometric qualities of the SAST, including inter-rater reliability of scoring, test-retest reliability, reliability of the individual subtests, overall test reliability, and inter-correlations among subtests. Additionally, the study evaluated the discriminatory capability of the SAST in distinguishing between individuals with aphasia and neurotypical controls, as well as between individuals with different types of aphasia. The findings revealed that the SAST has excellent inter-rater reliability, test-retest reliability, and internal consistency. There were statistically significant differences between individuals with aphasia and neurotypical controls on all SAST subtests. Furthermore, the study identified significant differences in language profiles among participants with different types of aphasia. The significant correlations between scores on the SAST and on the Boston Diagnostic Aphasia Examination (BDAE) suggest good convergent validity of the SAST. The results underscore the robust psychometric properties of this novel screening assessment (SAST) and its ability to effectively discriminate between diverse linguistic abilities within different aphasia syndromes in Serbian speaking individuals.

Development and initial validation of the metaverse worry inventory

Concern over the rapidly evolving metaverse is growing, leading to the development of the "metaverse worry". Therefore, the purpose of this study is to develop an appropriate psychometric instrument to measure metaverse worry. The Metaverse Worry Inventory (MWI) was developed through two studies (N = 672). In Study 1, rigorous processes including item analysis, exploratory factor analysis and confirmatory factor analysis revealed two reliable factors for the 10-item inventory: negative belief and negative feeling. The MWI had excellent internal consistency (Cronbach’s α = 0.89) and medium test-retest reliability (r = 0.62). In study 2, good criterion-related validity of the MWI was confirmed by examining the MWI's relationship with intolerance of uncertainty and Big Five personality. The MWI captured the latent variables of metaverse worry and is essential for promoting metaverse development and alleviating worries.

Reliability of Spatiotemporal Characteristics During Single-Legged Hop and Bilateral Drop Jump Tasks Using an Instrumented Pressure Walkway.

Single-legged hop tests have been widely used to assess performance-based outcomes after anterior cruciate ligament (ACL) reconstruction. Traditional single, triple, or 6-meter (6m) timed hop tests only measure distance or time as the principal variables, neglecting other variables, such as individual hop distances within a series of hops, flight time, and stance time. The development of portable instrumented pressure walkways has made it possible to collect parameters such as hop velocity, flight time, stance time, distance, and pressure outside of a laboratory setting. However, the reliability of instrumented pressure walkways in measuring spatial and temporal variables during single-legged hop tests is unknown. This study aimed to determine if the Zeno walkway can reliably measure spatiotemporal (ST) characteristics of hop tests. Cross-Sectional Study. Individuals (n=38) in this cross-sectional study performed single, triple, and 6m hop tests on a pressure-sensitive Zeno walkway. Twenty-one participants completed follow-up testing between one and 14 days later. Intraclass correlation coefficients (ICC(3,k)) were used to assess test-retest reliability of ST variables. The accuracy of vertical jump height and 6m hop timing were also measured. All ST variables demonstrated excellent test-retest reliability (ICC > 0.86) with small minimal detectable change (MDC) values during single-legged hop tests. Six-meter hop time and jump height during a bilateral drop jump were also accurately measured by the walkway. An instrumented pressure walkway is a novel tool to reliably assess non-traditional parameters of clinically relevant hop and jump tests such as flight time, stance time, and jump height after lower extremity injury, surgery, and rehabilitation. 3b.

Test-retest reliability and concurrent validity of knee extensor strength measured by a novel device incorporated into a weight stack machine vs. handheld and isokinetic dynamometry.

The current clinical gold standard for assessing isometric quadriceps muscle strength is an isokinetic dynamometer (IKD). However, in clinics without an IKD, clinicians default to using handheld dynamometers (HHD), which are less reliable and accurate than the IKD, particularly for large muscle groups. A novel device (ND) was developed that locks the weight stack of weight machines, and measures forces applied to the machine, turning this equipment into an isometric dynamometer. The objectives of this study were to characterize the test-retest reliability of the ND, determine the within-day and between-days inter-rater reliability and concurrent validity compared with that of the HHD, in healthy volunteers (HV) and individuals with knee osteoarthritis (OA) for measuring knee extensors isometric muscle force. 29 healthy (age = 28.4 ± 7.4 years) and 15 knee OA (age = 37.6 ± 13.4 years) participants completed three maximum force isometric strength testing trials on dominant side knee extensor muscles on three devices (ND, HHD, and IKD) in two separate sessions by two raters. The maximum force (Fmax) produced, and the force-time series were recorded. Reliability and validity were assessed using Intraclass Correlation Coefficient (ICC), Bland-Altman Plots, Pearson's r, and cross-correlations. The ND demonstrated excellent test-retest reliability (ICC2,3 = 0.97). The within-day (ICC2,3 = 0.88) and between-day inter-rater reliability (ICC2,3 = 0.87) was good for HHD. The ND showed excellent within-day (ICC2,3 = 0.93) and good between-day (ICC2,3 = 0.89) inter-rater reliability. The Bland-Altman analysis revealed HHD systematic bias and underestimation of force particularly with quadriceps force values exceeding 450 N. Mean differences were found in maximum force between HHD vs. IKD (MDabs = 58 N, p < .001) but not the HHD vs. ND (MDabs = 24 N, p = .267) or ND vs. IKD (MDabs = 34 N, p = .051). The concurrent validity of Fmax (r = 0.81) and force-time curve correlation (0.96 ± 0.05) were the highest between the ND and IKD. The ND's test-retest reliability and concurrent validity make it a potential strength assessment tool with utility in physical therapy and fitness settings for large muscle groups such as the knee extensors.

Ab. No. 118 Test-Retest Reliability of Commercially Available Bio-Electrical Impedance-Based Body Composition Analyzer in India

Introduction: The purpose of the study is to determine the consistency of body composition measures using a commercially available bioelectrical impedance-based body composition analyzer in India. Body composition assessment has application in several clinical populations including but not limited to those with obesity, cancer, renal failure, endocrine disorders. DEXA is considered gold standard but impractical to use in regular clinical practice. Bioelectrical impedance analysis (BIA) is emerging as a simpler alternative, especially in field settings and routine clinical practice. Its use is also recommended in current sarcopenia diagnostic guidelines. Many low-cost BIA devices are available but their reliability and validity information are seldom available. Such information can improve their relevance and utility in clinical settings. Methods: Forty apparently healthy adults (Age: 28±7.5 years; 78% women, BMI: 26.1±4.4). Following necessary approvals, body composition was assessed using four-point full body impedance analysis with Omron HBF-702T device on two occasions (1-4 days apart). The timing of measurement, food and fluid intake were not standardized to mimic clinical scenarios. Paired T-test determined significant difference between two assessments. Test-retest reliability was determined by ICC using two-way mixed methods model for consistency between measurements. Results: There was no clinically and statistically significant difference between two consecutive measurements (Mean difference of - Skeletal Muscle Percentage: 0.06%; Body Fat Percentage: 0.12%; RMR: 8.5 Kcal/day). All parameters exhibited excellent test-retest reliability (ICC &amp; Cronbach’s Alpha: Skeletal Muscle Percentage – 0.97 &amp; 0.98; Body Fat Percentage – 0.93 &amp; 0.96; RMR – 0.94 &amp; 0.97. Conclusion: The tested device exhibited excellent test-retest reliability for skeletal muscle, body fat percentage, and resting metabolic rate despite testing in non-standardized routine clinical setting. Implications: Bio-electrical impedance-based body composition analyzers could be a reliable way to measure body composition in clinical practice. However, each equipment’s reliability and validity needs to be established prior to clinical use.

High test-retest reliability of the Alcohol Use Disorders Identification Test-Consumption (AUDIT-C) questionnaire completed by primary care patients in routine care.

The Alcohol Use Disorders Identification Test-Consumption (AUDIT-C) is a three-item screening measure of unhealthy alcohol use that is widely used in healthcare settings. Evidence shows high test-retest reliability of the AUDIT-C in research samples, but most studies had limited external validity and used small samples that could not be used to evaluate reliability across demographic subgroups and/or screening modalities. This study evaluates the test-retest reliability of the AUDIT-C completed in routine care in a large primary care sample, including across demographic subgroups defined by age, sex, race, ethnicity, and screening modality (i.e., completed in-clinic or online). We used electronic health record (EHR) data from Kaiser Permanente Washington. The sample included 18,491 adult primary care patients who completed two AUDIT-C screens 1-21 days apart as part of routine care in 2021. Test-retest reliability was evaluated for AUDIT-C total scores (0-12) and for a binary measure indicating unhealthy alcohol use (scores ≥3 women, ≥4 men). Using previously established cutoffs, we interpreted reliability coefficients >0.75 as indicating "excellent" reliability. AUDIT-C screens completed in routine care and documented in EHRs had excellent test-retest reliability for total scores (ICC = 0.87, 95% CI: 0.87-0.87) and the binary indicator of unhealthy alcohol use (κ = 0.79, 95% CI: 0.78-0.80). Reliability coefficients were good to excellent across all demographic groups and for in-clinic and online modalities. Higher reliability was seen when both screens were completed through online patient portals (ICC = 0.93, 95% CI: 0.93-0.93) versus in-clinic (ICC = 0.81, 95% CI: 0.79-0.82) or when one screen was completed using each modality (ICC = 0.83, 95% CI: 0.82-0.83). Lower reliability was seen in American Indian/Alaska Native (ICC = 0.82, 95% CI: 0.75-0.87) and multiracial individuals (ICC = 0.82, 95% 0.80-0.84). In real-world routine care conditions, AUDIT-C screens have excellent test-retest reliability across demographic subgroups and modalities (online and in-clinic). Future research should examine why reliability varies slightly across modalities and demographic subgroups.

GAIT PARAMETERS IN OLDER BREAST CANCER SURVIVORS WITH PERSISTENT CHEMOTHERAPY-INDUCED PERIPHERAL NEUROPATHY

Abstract Chemotherapy-induced peripheral neuropathy (CIPN) results from chemotherapy for breast cancer treatment. CIPN symptoms persist causing significant loss of functional abilities and increased risk of falls. This study aimed to assess the spatiotemporal gait parameters in breast cancer survivors with CIPIN using an IMU system. We hypothesized that spatiotemporal gait parameters will differ between patients with persistent CIPN as compared to normative values. Thirty-two women who completed taxane-based chemotherapy for breast cancer and who have symptomatic neuropathy &amp;gt;6 months following completion of chemotherapy. Gait was assessed using seven Inertial Measurement Unit (IMU) sensors positioned at the sacrum, upper and lower leg, and foot. Participants completed a 2-minute walk at a comfortable walking pace. The outcome variables assessed included gait speed, single limb support, stride length, gait cycle time, stance percent, swing percent, double support percent, and cadence. Mean age 65(10) years, gait speed was 0.95(0.2) meters/second, single limb support 37.9(2.2) % of gait cycle, stride length 1.1(0.2) meters, gait cycle time 1.2(0.1) seconds, stance percent 62.1(2.2)% GC, swing percent 37.9(2.2)% GC, double support percent 23.9(4.3)% GC, and cadence 104.6(12.3) steps/min. Gait parameters assessed in this study showed an excellent test-retest reliability (r &amp;gt;0.86; ICC &amp;gt; 0.90). This is the first study to assess gait parameters in older breast cancer survivors with CIPN. Breast cancer survivors with CIPN showed reductions in all gait parameters. Reduced gait speed and stride length are critical indicators of fall risk for women with CIPN. Our study confirmed differences in spatiotemporal parameters between patients with persistent CIPN.

USABILITY AND PSYCHOMETRIC PROPERTIES OF THE MOBITEC-GP APP FOR REAL-LIFE MOBILITY ASSESSMENT

Abstract Modern technologies such as the Global Navigation Satellite System and accelerometers which are integrated in every smartphone enable tracking mobility patterns over time, which in turn enables early detection of mobility impairments. Aim of the MOBITEC-GP project was to develop a mobile app which measures walking speed and spatial mobility under everyday conditions. Reliability and validity of the application was tested first (Study 1). The applicability in everyday life and the acceptance by older adults (Study 2) was also investigated. In study 1, participants underwent several supervised walking speed assessments as well as a 1-week life-space assessment during two assessment sessions 9 days apart. Fifty-seven older adults (47.4% male, mean age= 75.3 years) were included in the study. The app showed moderate to excellent test-retest reliability and validity of walking speed measurements of 50 meters and above and of most 1-week life-space parameters, including life-space area, time spent out-of-home, and action range. Study 2 revealed a good usability of the app (mean System Usability Scale score=77.18) among older adults (N=60 with ≥2 chronic conditions) for a 1-week usage of the app including both, a 1-week life space assessment and at least one gait speed measurement in a 30-minute stroll. The MOBITEC-GP app is a reliable, valid and usable tool for the assessment of real-life walking speed (at distances of 50 metres and above) and life-space parameters of older adults. Future studies should look into technical issues more systematically in order to avoid invalid measurements.

Validation of the brain injury associated visual impairment - impact questionnaire (BIVI-IQ)

PurposeThe Brain Injury associated Visual Impairment - Impact Questionnaire (BIVI-IQ) was developed to assess the impact of post-stroke visual impairment. The development of the questionnaire used robust methods involving stroke survivors and clinicians. The aim of this study was to assess the validity of the BIVI-IQ in a stroke population.MethodsStroke survivors with visual impairment were recruited from stroke units, outpatient clinics and non-healthcare settings. Participants were asked to complete questionnaire sets on three separate occasions; the BIVI-IQ at each visit with additional questionnaires at baseline and visit 2. Vision assessment and anchor questions from participants and clinicians were collected. The analysis included assessment of missing data, acceptability, Rasch model analysis, test–retest reliability, construct validity (NEI VFQ-25, EQ-5D-5L) and responsiveness to change.Results316 stroke survivors completed at least one questionnaire of the 326 recruited. Mean age was 67 years and 64% were male. Adequate fit statistics to the Rasch model were reached (χ2 = 73.12, p = 0.02) with two items removed and thresholds of two adjusted, indicating validity and unidimensionality. Excellent test–retest reliability was demonstrated (ICC = 0.905) with a 3-month interval. Construct validity was demonstrated with a strong significant correlation to the NEI VFQ-25 (r = 0.837, p < 0.01). The BIVI-IQ also demonstrated responsiveness to change with significant differences identified between groups based on participant and clinician anchor questions (X2 = 23.29, p < 0.001; X2 = 24.56, p < 0.001).ConclusionThe BIVI-IQ has been shown to be valid and practical for ‘everyday’ use by clinicians and researchers to monitor vision-related quality of life in stroke survivors with visual impairment.

Validation of the Malay version of Epworth sleepiness scale for children and adolescents (MESS-CHAD)

BackgroundEpworth Sleepiness Scale for Children and Adolescents (ESS-CHAD) is a valid and reliable eight-item self-administered questionnaire for the assessment of excessive daytime sleepiness and is commonly used to screen sleep-disordered breathing for children and adolescents. The cross-sectional study aimed to translate and cross-culturally adapt ESS-CHAD into a Malay version of Epworth Sleepiness Scale for Children and Adolescents (MESS-CHAD) for the Malaysian population, and to assess the validity and reliability of MESS-CHAD.MethodsForward-backward translation method was used to translate and cross-culturally adapt ESS-CHAD. Three linguistic experts and two paediatricians content validated the translated version. Face validity was conducted through audio-recorded semi-structured in-depth interviews with 14 native Malay-speaking children and adolescents followed by thematic analysis. The revised questionnaire was then proofread by a linguistic expert. A total of 40 subjects answered the MESS-CHAD twice, 2 weeks apart, for test-retest reliability and internal consistency. For criterion validity, 148 eligible subjects and their parents answered MESS-CHAD and the Malay version of Sleep-Related Breathing Disorder scale extracted from the Paediatric Sleep Questionnaire (M-PSQ:SRBD) concurrently. Variance Inflation Factor (VIF) and P values of the model’s outer weight and outer loading were analysed using SmartPLS software to assess the indicator’s multicollinearity and significance for formative construct validity.ResultsIntraclass Correlation Coefficient (ICC) ranging from 0.798 to 0.932 and Cronbach’s alpha ranging from 0.813 to 0.932 confirmed good to excellent test-retest reliability and internal consistency, respectively. Spearman Correlation Coefficient value of 0.789 suggested a very strong positive correlation between MESS-CHAD and M-PSQ:SRBD. VIF ranging from 1.109 to 1.455 indicated no collinearity problem. All questionnaire items in MESS-CHAD were retained as the P value of either outer model weight or outer model loading was significant (P < 0.05).ConclusionESS-CHAD has been translated and cross-culturally adapted into Malay version for the Malaysian population, and found to be valid and reliable.