The thermal sensation threshold and its reliability induced by the exposure to 28 GHz millimeter-wave.

The application of 28 GHz millimeter-wave is prevalent owing to the global spread of fifth-generation wireless communication systems. Its thermal effect is a dominant factor which potentially causes pain and tissue damage to the body parts exposed to the millimeter waves. However, the threshold of this thermal sensation, that is, the degree of change in skin temperature from the baseline at which the first subjective response to the thermal effects of the millimeter waves occurs, remains unclear. Here, we investigated the thermal sensation threshold and assessed its reliability when exposed to millimeter waves. Twenty healthy adults were exposed to 28 GHz millimeter-wave on their left middle fingertip at five levels of antenna input power: 0.2, 1.1, 1.6, 2.1, and 3.4 W (incident power density: 27-399 mW/cm2). This measurement session was repeated twice on the same day to evaluate the threshold reliability. The intraclass correlation coefficient (ICC) and Bland-Altman analysis were used as proxies for the relative and absolute reliability, respectively. The number of participants who perceived a sensation during the two sessions at each exposure level was also counted as the perception rate. Mean thermal sensation thresholds were within 0.9°C-1.0°C for the 126-399 mW/cm2 conditions, while that was 0.2°C for the 27 mW/cm2 condition. The ICCs for the threshold at 27 and 126 mW/cm2 were interpreted as poor and fair, respectively, while those at higher exposure levels were moderate to substantial. Apart from a proportional bias in the 191 mW/cm2 condition, there was no fixed bias. All participants perceived a thermal sensation at 399 mW/cm2 in both sessions, and the perception rate gradually decreased with lower exposure levels. Importantly, two-thirds of the participants answered that they felt a thermal sensation in both or one of the sessions at 27 mW/cm2, despite the low-temperature increase. These results suggest that the thermal sensation threshold is around 1.0°C, consistent across exposure levels, while its reliability increases with higher exposure levels. Furthermore, the perception of thermal sensation may be inherently ambiguous owing to the nature of human perception.

Gamified exercise for the distal upper extremity in people with post-stroke hemiparesis: feasibility study on subjective perspectives during daily continuous training.

INTRODUCTION: Dose (number of repetitions) has been suggested as a key element in the effectiveness of rehabilitation exercises to promote motor recovery of the hemiparetic upper limb. However, rehabilitation exercises tend to be monotonous and require significant motivation to continue, making it difficult to increase the exercise dose. To address this issue, gamification technology has been implemented in exercises to promote self-engagement for people with hemiparesis in continuing monotonous repetitive movements. This study aimed to investigate how subjective perspectives, specifically enjoyability, motivation to continue, and expectancy of effectiveness, change through continuous daily exercise using a developed gamified exercise system. MATERIALS AND METHOD: Ten people with stroke suffering upper limb dysfunction underwent daily gamified exercise for seven days. The gamified exercise consisted of an electromyography (EMG)-controlled operating system that enabled users to play virtual games using repetitive finger movements. The participants performed conventional self-exercise on the same day as the control exercise, and rated their subjective perspectives on both exercises on a numerical rating scale on each exercise day. RESULTS: Ratings for enjoyability and motivation to continue consistently showed significantly higher scores for the gamified exercise than for conventional self-exercise on all exercise days. A similar trend was observed in the ratings for the expectancy of effectiveness. No changes over time were found in any of the ratings throughout the exercise period. CONCLUSIONS: Exercise using the developed EMG-controlled gamified system may have the potential to maintain motivation and enjoyment in people with stroke to continue monotonous repetitive finger movements.

Although dose (number of repetitions) has been suggested as a key element in the effectiveness of rehabilitation exercises to promote motor recovery of the hemiparetic upper limb, rehabilitation exercises tend to be monotonous and require significant motivation to continue.Gamification technology has been implemented in exercises to promote self-engagement for people with hemiparesis in continuing monotonous repetitive movements.Exercises using the developed EMG-controlled gamified system may have the potential to maintain motivation and enjoyment in people with stroke to continue monotonous repetitive finger movements.

Direction-dependent differences in the quality and quantity of horizontal reaching in people after stroke.

Arm reaching is often impaired in individuals with stroke. Nonetheless, how aiming directions influence reaching performance and how such differences change with motor recovery over time remain unclear. Here, we elucidated kinematic parameters of reaching toward various directions in people with poststroke hemiparesis in the subacute phase. A total of 13 and 15 participants with mild and moderate-to-severe hemiparesis, respectively, performed horizontal reaching in eight directions with their more-affected and less-affected sides using an exoskeleton robotic device at the time of admission to and discharge from the rehabilitation ward of the hospital. The movement time, path length, and number of velocity peaks were computed for the mild group (participants able to reach toward all eight directions). In addition, the total amount of displacement (i.e., movement quantity) toward two simplified directions (mediolateral or anteroposterior) was evaluated for the moderate-to-severe group (participants who showed difficulty in completing the reaching task). Motor recovery was evaluated using the Fugl-Meyer assessment. The mild group showed worse values of movement parameters during reaching in the anteroposterior direction, irrespective of the side of the arm or motor recovery achieved. The moderate-to-severe group exhibited less movement toward the anteroposterior direction than toward the mediolateral direction at admission; however, this direction-dependent bias in movement quantity decreased, with the movement expanding toward the anteroposterior direction with motor recovery at discharge. These results suggest that direction-dependent differences in the quality and quantity of reaching performance exist in people after stroke, regardless of the presence or severity of hemiparesis. This highlights the need to consider the task work area when designing rehabilitative training.NEW & NOTEWORTHY Arm reaching, a fundamental function required for the upper extremities, is often impaired after stroke due to muscle weakness and abnormal synergies. Nonetheless, how aiming directions influence performance remains unclear. Here, we report that direction-dependent differences in the quality and quantity of reaching performance exist, surprisingly regardless of the presence or severity of hemiparesis. This result highlights the need to consider the task work area when designing rehabilitative training.

Influence of motivation on rehabilitation outcomes after subacute stroke in convalescent rehabilitation wards.

Background: The motivation for rehabilitation is important in encouraging stroke patients to participate in rehabilitation; however, its relationship with outcomes is not well known. In addition, changes in patient motivation during hospitalization have not been examined. Aim: To examine the relationship between motivation and rehabilitation outcomes for subacute stroke patients and to investigate the changes in motivation. Design: Prospective cohort study. Setting: Subacute rehabilitation hospital. Population: The study enrolled a consecutive sample of patients (n = 201) with stroke admitted to a subacute rehabilitation ward from October 2017 to March 2019. Methods: The functional independence measure and motivation in stroke patients for rehabilitation scale was evaluated at admission; at one, two, and three months after admission; and at discharge. The effectiveness and efficiency of the functional independence measure were calculated as rehabilitation outcomes. The effect of motivation on outcomes and the change in motivation in stroke patients for rehabilitation scale scores over time were analyzed using a linear mixed model. Results: The median (interquartile range) converted motivation in stroke patients for rehabilitation scale scores (converted to a range of 0-100) at admission; one, two, and three months after admission; and discharge was 86 (76-95), 83 (77-94), 81 (74-95), 81 (71-93), and 84 (75-95), respectively. The median (interquartile range) of effectiveness and efficiency of the functional independence measure from admission to discharge was 0.82 (0.68-0.91) and 0.41 (0.30-0.59), respectively. Motivation in stroke patients for rehabilitation scale scores were not significantly associated with the effectiveness and efficiency of the functional independence measure (p > 0.05). Motivation in stroke patients for rehabilitation scale scores were significantly lower at two (ß = -3.1, 95% confidence interval [-5.3, -0.9], p = 0.005) and three (ß = -4.4, 95% confidence interval [-7.3, -1.6], p = 0.002) months after admission than at admission. Conclusion: Motivation might not directly affect rehabilitation outcomes assessed by the functional independence measure. Furthermore, many participants remained highly motivated, although their motivation decreased at one or three months after admission. Clinical rehabilitation impact: Assumptions that rehabilitation is ineffective because of low motivation may not be correct. To examine the influence on outcomes, both motivation and daily activities should be considered.

Characteristics of current perception produced by intermediate-frequency contact currents in healthy adults.

Introduction: Contact electrical currents in humans stimulate peripheral nerves at frequencies of <100 kHz, producing sensations such as tingling. At frequencies above 100 kHz, heating becomes dominant, resulting in a sensation of warmth. When the current amplitude exceeds the threshold, the sensation results in discomfort or pain. In international guidelines and standards for human protection from electromagnetic fields, the limit for the contact current amplitude has been prescribed. Although the types of sensations produced by contact current at low frequencies, i.e., approximately 50-60 Hz, and the corresponding perception thresholds have been investigated, there is a lack of knowledge about those in the intermediate-frequency band-particularly from 100 kHz to 10 MHz. Methods: In this study, we investigated the current-perception threshold and types of sensations for 88 healthy adults (range: 20-79 years old) with a fingertip exposed to contact currents at 100 kHz, 300 kHz, 1 MHz, 3 MHz, and 10 MHz. Results: The current perception thresholds at frequencies ranging from 300 kHz to 10 MHz were 20-30% higher than those at 100 kHz (p < 0.001). In addition, a statistical analysis revealed that the perception thresholds were correlated with the age or finger circumference: older participants and those with larger finger circumferences exhibited higher thresholds. At frequencies of ≥300 kHz, the contact current mainly produced a warmth sensation, which differed from the tingling/pricking sensation produced by the current at 100 kHz. Discussion: These results indicate that there exists a transition of the produced sensations and their perception threshold between 100 kHz and 300 kHz. The findings of this study are useful for revising the international guidelines and standards for contact currents at intermediate frequencies. Clinical trial registration: https://center6.umin.ac.jp/cgi-open-bin/icdr_e/ctr_view.cgi?recptno=R000045660, identifier UMIN 000045213.

Differences in the difficulty of subtasks comprising the toileting task among patients with subacute stroke: A cohort study.

INTRODUCTION: Toileting comprises multiple subtasks, and the difficulty of each is critical to determining the target and priority of intervention. The study aimed to examine the difficulty of subtasks that comprise toileting upon admission and the reacquisition of skills of subtasks during hospitalization. MATERIALS AND METHODS: This was a single-center prospective cohort study. We enrolled 101 consecutive stroke patients (mean age: 69.3 years) admitted to subacute rehabilitation wards. The independence in each of the 24 toileting subtasks was assessed using the Toileting Tasks Assessment Form (TTAF) every two or four weeks. The number of patients who were independent upon admission, as well as those who were not independent upon admission but became independent during hospitalization, was examined in each subtask. RESULTS: The most difficult subtask upon admission was "Lock the wheelchair brakes" (16.8% of patients were independent), followed by "Turn while standing (before urination/defecation)" (17.8%), "Pull the lower garments down" (18.0%), "Turn while standing (after urination/defecation)" (18.8%), "Pull the lower garments up and adjust them" (18.8%), and "Maintain a standing position (before urination/defecation)" (18.8%). The most difficult subtask for those who were not independent but became independent was "Dispose of incontinence pad/sanitary items" (19.3%), followed by "Press the nurse call button (after urination/defecation)" (28.3%), "Take the foot off the footrest and place it on the ground" (28.6%), and "Clean up after urination/defecation" (29.0%). CONCLUSIONS: The difficult subtasks upon admission and those for reacquired skills were different. The most difficult subtasks upon admission were main tasks, and the difficult subtasks in reacquiring skills were preparatory tasks.

Electromyography-controlled gamified exercise system for the distal upper extremity: a usability assessment in subacute post-stroke patients.

PURPOSE: Movement repetition is known to play a key role in promoting functional improvements or maintaining functional levels in post-stroke hemiparetic patients. However, repetitive movements tend to be monotonous, making it challenging for patients to continue. Here, we developed a new gamified system to allow patients perform repetitive movements with enjoyment. The present study aimed to examine the usability of the system in subacute stroke patients. METHOD: The exercise system comprised an electromyography-controlled operating system that enabled users to play a virtual game by repetitive finger and wrist movements on the affected side. A total of 13 patients with upper-limb hemiparesis underwent a single bout of exercise using the system and assessed its usability, satisfactoriness, enjoyability, etc. using the System Usability Scale (SUS), Quebec User Evaluation of Satisfaction with assistive Technology (QUEST)-like questionnaire, and numerical rating scale (NRS). RESULTS: All the participants, who had a wide range of paretic levels, were able to perform the exercise using the system. Participants scored the system a median of 85.0 for SUS and 4.2 for the QUEST-like questionnaire, with an "excellent" in usability and "satisfied" in user satisfaction with the system. The median NRS scores for enjoyability, potential for continuous use, and effectiveness were 8.0, 9.0, and 9.0, respectively, which were greater than the scores for usual rehabilitation training for the upper extremity. CONCLUSIONS: The novel electromyography-controlled gamified exercise system may have sufficient usability and enjoyability to motivate patients with a wide range of paretic levels to perform repetitive finger and wrist movements.IMPLICATIONS FOR REHABILITATIONThe electromyography-controlled gamified exercise system had overall positive perspectives on the usability of the system.This exercise system could help motivate patients with a wide range of paretic levels to perform repetitive finger and wrist movements.

Development of an assessment form for the performance of public transportation use in individuals with stroke.

PURPOSE: To develop a new assessment form that is assessed by therapists for the performance of public transportation use for stroke survivors through content validation. MATERIALS AND METHODS: The items for the tentative assessment form were selected using hierarchical clustering analysis on previous records of 76 field-based training sessions for public transportation use for stroke survivors. After the modification of the tentative form based on 6 months of clinical use, the final form was developed through content validation using the Delphi method by 71 therapists who had been working at the hospital for more than 2 years and had experience with training for public transportation use. RESULTS: The Public Transportation use Assessment Form (PTAF) for stroke was successfully developed through three validation processes. It consists of four categories (plan for going out, mobility, using trains, and using buses) including 15 items that cover various tasks of public transportation use. The scoring for each was as follows: 3, independent; 2, requires supervision of verbal assistance; 1, requires assistance; and N, not applicable. CONCLUSION: The PTAF, developed through content validation, could assess the ability of public transportation use, and identify specific problems for each stroke survivor in clinical setting.IMPLICATIONS FOR REHABILITATIONWe developed the Public Transportation use Assessment Form (PTAF) to assess the ability of stroke survivors to use public transportation.The PTAF could identify specific problems related to public transportation use for stroke survivors and aid in planning rehabilitation programs based on the results.The PTAF could share information about which task need support in public transportation use and could augment the hospital discharge plan.

Reliability and validity of the public transportation use assessment form for individuals after stroke.

PURPOSE: To examine the reliability and validity of the public transportation use assessment form (PTAF), which was developed for assessing the performance of tasks during public transportation use. MATERIALS AND METHODS: Fifty consecutive patients admitted after a stroke to a convalescent rehabilitation hospital and received field-based practice for public transportation use were enrolled. A physical therapist (PT) and an occupational therapist (OT) independently evaluated actual participant performance using the PTAF. Its internal consistency, inter-rater reliability, and construct validity were examined against other clinical measures related to the ability to use public transportation. RESULTS: Cronbach's coefficient alpha for the internal consistency for overall PTAF was 0.84 and 0.88 for PTs and OTs, respectively. Cohen's weighted κ coefficient for the inter-rater reliability for each item ranged from 0.61 to 0.83. Intraclass correlation coefficients for the inter-rater reliability for the mean scores of the items comprising the PTAF were 0.90 for all 14 items, 0.76 for items required for train use only, and 0.88 for items required for bus use only. The correlation coefficients for the construct validity between PTAF and clinical measures ranged from 0.38 to 0.59 (p < 0.05). CONCLUSIONS: The PTAF showed sufficient internal consistency, intra-rater reliability, and construct validity.Implications for rehabilitationThis study illustrated the inter-rater reliability of the public transportation use assessment form (PTAF), indicating that the PTAF can be used for reliable assessment independent of the rater.The PTAF showed good internal consistency, indicating that each item in the PTAF consistently assessed the ability of patients with stroke to use public transportation.The PTAF correlated with assessment tools such as walking ability, balance, motor paralysis, intelligence, and activities of daily living, indicating that it reflects the functions and abilities necessary to use public transportation.

Effects of cerebellar transcranial direct current stimulation on upper limb motor function after stroke: study protocol for the pilot of a randomized controlled trial.

BACKGROUND: Transcranial direct current stimulation (tDCS) is a technique that can noninvasively modulate neural states in a targeted brain region. As cerebellar activity levels are associated with upper limb motor improvement after stroke, the cerebellum is a plausible target of tDCS. However, the effect of tDCS remains unclear. Here, we designed a pilot study to assess: (1) the feasibility of a study that aims to examine the effects of cerebellar tDCS combined with an intensive rehabilitation approach based on the concept of constraint-induced movement therapy (CIMT) and (2) the preliminary outcome of the combined approach on upper limb motor function in patients with stroke in the chronic stage. METHODS: This pilot study has a double-blind randomized controlled design. Twenty-four chronic stroke patients with mild to moderate levels of upper limb motor impairment will be randomly assigned to an active or sham tDCS group. The participants will receive 20 min of active or sham tDCS to the contralesional cerebellum at the commencement of 4 h of daily intensive training, repeatedly for 5 days per week for 2 weeks. The primary outcomes are recruitment, enrollment, protocol adherence, and retention rates and measures to evaluate the feasibility of the study. The secondary outcome is upper limb motor function which will be evaluated using the Action Research Arm Test, Fugl-Meyer Assessment, for the upper extremity and the Motor Activity Log. Additionally, neurophysiological and neuroanatomical assessments of the cerebellum will be performed using transcranial magnetic stimulation and magnetic resonance imaging. These assessments will be conducted before, at the middle, and after the 2-week intervention, and finally, 1 month after the intervention. Any adverse events that occur during the study will be recorded. DISCUSSION: Cerebellar tDCS combined with intensive upper limb training may increase the gains of motor improvement when compared to the sham condition. The present study should provide valuable evidence regarding the feasibility of the design and the efficacy of cerebellar tDCS for upper limb motor function in patients with stroke before a future large trial is conducted. TRIAL REGISTRATION: This study has been registered at the Japan Registry of Clinical Trials ( jRCTs042200078 ). Registered 17 December 2020.

Difficulty of the subtasks comprising bed-wheelchair transfer in patients with subacute strokes: A cohort study.

OBJECTIVE: Bed-wheelchair transfer comprises multiple subtasks; hence, it is important to know the difficulty of each subtask to identify and prioritize subtasks that must be practiced. This study aimed to investigate the difficulty of the subtasks that comprise bed-wheelchair transfer upon admission and reacquiring subtask skills during hospitalization. MATERIALS AND METHODS: This was a single-center prospective cohort study. We enrolled 137 consecutive stroke patients (mean age: 69.8 years) admitted to subacute rehabilitation wards who used wheelchairs upon admission. The degree of independence in each of the 25 subtasks that comprised transferring was assessed using the Bed-wheelchair transfer Tasks Assessment Form every 2 weeks. The number of patients who were independent in the subtasks upon admission and those who were not but became independent during hospitalization were examined. RESULTS: The most difficult subtask for independent patients upon admission was "Manipulate the handrail for the bed" (18.3%), followed by "Ready the wheelchair for transfer" (19.3%), "Maneuver the wheelchair toward the appropriate place for transfer to the bed" (20.6%), "Wear shoes/brace" (24.8%), and "Turn while standing" (25.5%). The most difficult subtask for those who were not independent but became independent was "Ready the wheelchair for transfer" (32.1%), followed by "Manipulate the handrail for the bed" (32.9%), "Press the nurse call button" (36.4%), "Press the nurse call button (wheelchair-to-bed)" (36.7%), and "Lock the wheelchair brakes" (37.3%). CONCLUSIONS: Subtasks related to preparation for transfer were difficult upon admission, and this tendency became more pronounced during the skill acquisition process.

Cumulative Risk And Associated Factors For Fall-Related Fractures In Stroke Survivors After Discharge From Rehabilitation Wards: A Retrospective Study With A 6-Year Follow-Up.

OBJECTIVE: To investigate the long-term cumulative risk and factors associated with fall-related fractures in stroke survivors discharged from convalescent rehabilitation wards. DESIGN: Retrospective cohort study. PARTICIPANTS: A total of 786 stroke survivors discharged from a rehabilitation hospital. METHODS: Data regarding fall-related fractures posthospital discharge were collected using self-reported questionnaires. The Kaplan-Meier method was used to calculate the cumulative incidence of fall-related fractures, and risk factors were analysed using Cox proportional hazard regression analysis. RESULTS: Of 1,861 consecutive stroke survivors who had been discharged from hospital, 786 (42.2%) provided information concerning fall-related fractures. Duration from time of discharge to time of collection of questionnaires ranged from 1 to 6 years (mean 38.0 months). The cumulative incidence of fall-related fractures at 1-, 2-, 3-, 4-, and 5-years post-discharge was 4.2%, 7.9%, 10.8%, 12.5% and 13.7%, respectively. Cox proportional hazard regression analysis indicated that female sex (hazard ratio (HR) 1.69) and moderate lower limb paresis (HR 3.08) were significant risk factors. CONCLUSION: The cumulative risk of fall-related fractures in stroke survivors post-discharge from a rehabilitation hospital was notably high. Intensive preventive intervention should be considered for female stroke survivors with moderate lower limb paresis.

Development and validation of new evaluation scale for measuring stroke patients' motivation for rehabilitation in rehabilitation wards.

OBJECTIVE: This study aimed to develop the Motivation in stroke patients for rehabilitation scale (MORE scale), following the Consensus-based standards for the selection of health measurement instruments (COSMIN). METHOD: Study participants included rehabilitation professionals working at the convalescent rehabilitation hospital and stroke patients admitted to the hospital. The original MORE scale was developed from an item pool, which was created through discussions of nine rehabilitation professionals. After the content validity of the scale was verified using the Delphi method with 61 rehabilitation professionals and 22 stroke patients, the scale's validity and reliability were examined for 201 stroke patients. The construct validity of the scale was investigated using exploratory factor analysis (EFA), confirmatory factor analysis (CFA), and item response theory analysis. Cronbach's alpha confirmed its internal consistency. Regarding convergent, discriminant, and criterion validity, Spearman's rho was calculated between the MORE scale and the Apathy Scale (AS), Self-rating Depression Scale (SDS), and Visual Analogue Scale (VAS), which rates the subjective feelings of motivation. RESULTS: Using the Delphi method, 17 items were incorporated into the MORE scale. According to EFA and CFA, a one-factor model was suggested. All MORE scale items demonstrated satisfactory item response, with item slopes ranging from 0.811 to 2.142, and item difficulty parameters ranging from -3.203 to 0.522. Cronbach's alpha was 0.948. Regarding test-retest reliability, a moderate correlation was found between scores at the beginning and one month after hospitalization (rho = 0.612. p < 0.001). The MORE scale showed significant correlation with AS (rho = -0.536, p < 0.001), SDS (rho = -0.347, p < 0.001), and VAS (rho = 0.536, p < 0.001), confirming the convergent, discriminant, and criterion validity, respectively. CONCLUSIONS: The MORE scale was verified as a valid and reliable scale for evaluating stroke patients' motivation for rehabilitation.

Reliability and Validity of a New Toileting Assessment Form for Patients with Hemiparetic Stroke.

BACKGROUND: Acquiring toileting independence is an important target of stroke rehabilitation. In planning an intervention for acquiring toileting independence, developing an assessment for individual subtasks that comprise toileting would assist in identifying specific tasks that prevent independence in patients and would facilitate interventions to improve toileting independence. OBJECTIVE: To examine the reliability and validity of a newly developed toileting assessment form, the Toileting Tasks Assessment Form (TTAF), for assessing toileting subtasks in hemiparetic stroke. DESIGN: Validation and test-retest study. SETTING: Subacute rehabilitation wards in Japan. PARTICIPANTS: Eighty-two therapists verified the form's content validity; 30 stroke patients who were using a wheelchair participated in the validation and test-retest study. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: The content validity of the assessment form was initially assessed based on a questionnaire. Subsequently, four occupational therapists used the form to evaluate video-recorded toileting performances simulated by participants with hemiparetic stroke. Two assessors evaluated each video-recorded performance once and repeated the evaluation of the same performance at 2 weeks later. The interrater reliability, intrarater reliability, internal consistency, and concurrent validity of the form were examined. RESULTS: Fleiss' κ coefficient for interrater reliability for each form item was 0.61 or more. Cohen's κ coefficient for intrarater reliability for each item was 0.60 or more. Cronbach's coefficient alpha ranged from 0.94 to 0.95. Spearman's rank correlation coefficients for the mean score on the form and the Functional Independence Measure (FIM) score for "toileting" ranged from 0.88 to 0.93 (P < .001). Spearman's rank correlation coefficients for the mean score on the form and the FIM score for "toilet transfer" ranged from 0.91 to 0.93 (P < .001). CONCLUSIONS: The TTAF demonstrated good reliability and validity. Further multicenter studies involving patients at different stroke phases are required to verify the reliability and validity of TTAF and confirm the generalizability of these findings.

Reliability and Validity of a New Transfer Assessment Form for Stroke Patients.

INTRODUCTION: Transferring is a basic skill that is essential for mobility independence and indispensable for expanding activities of daily living of stroke patients using a wheelchair. Therefore, transfer independence is an important issue that greatly affects daily life in the hospital and at home. To offer an effective intervention to acquire a skill, developing an assessment for individual subtasks that comprise transferring would assist the identification of specific tasks that prevent independence in patients and facilitate interventions to improve transferring independence. OBJECTIVE: To examine the reliability and validity of a newly developed transfer assessment form, the Bed-wheelchair transfer Tasks Assessment Form (BTAF), for stroke patients to evaluate subtasks required for transferring. DESIGN: Validation and test-retest studies. SETTING: Subacute rehabilitation wards in Japan. PARTICIPANTS: A total of 82 therapists for verifying content validity; 30 patients for validation and test-retest study. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: The content validity was initially assessed based on a questionnaire. Subsequently, four occupational therapists used the form to evaluate the video-recorded transferring performances of stroke participants. Two assessors evaluated each performance once and then 2 weeks later. The inter-rater reliability, intra-rater reliability, internal consistency, and concurrent validity were examined. RESULTS: Fleiss's κ coefficient for inter-rater reliability for each item of the form was 0.66 or more. Cohen's κ coefficient for intra-rater reliability for each item was 0.73 or more. Cronbach's coefficient alpha ranged from 0.90 to 0.93. Spearman's rank correlation coefficients between the mean scores of our form and scores of the functional independence measure item "transfer to bed/chair/wheelchair" ranged from 0.53 to 0.78 (P < .01). CONCLUSIONS: The form demonstrated good reliability and validity. Its usefulness and efficacy should be further investigated in stroke patients to facilitate rehabilitation.