Academic literature on the topic 'LLFDI'

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Journal articles on the topic "LLFDI"

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Arensman, Remco M., Martijn F. Pisters, Janneke M. de Man-van Ginkel, Marieke J. Schuurmans, Alan M. Jette, and Rob A. de Bie. "Translation, Validation, and Reliability of the Dutch Late-Life Function and Disability Instrument Computer Adaptive Test." Physical Therapy 96, no. 9 (2016): 1430–37. http://dx.doi.org/10.2522/ptj.20150265.

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Abstract Background Adequate and user-friendly instruments for assessing physical function and disability in older adults are vital for estimating and predicting health care needs in clinical practice. The Late-Life Function and Disability Instrument Computer Adaptive Test (LLFDI-CAT) is a promising instrument for assessing physical function and disability in gerontology research and clinical practice. Objective The aims of this study were: (1) to translate the LLFDI-CAT to the Dutch language and (2) to investigate its validity and reliability in a sample of older adults who spoke Dutch and dwelled in the community. Design For the assessment of validity of the LLFDI-CAT, a cross-sectional design was used. To assess reliability, measurement of the LLFDI-CAT was repeated in the same sample. Methods The item bank of the LLFDI-CAT was translated with a forward-backward procedure. A sample of 54 older adults completed the LLFDI-CAT, World Health Organization Disability Assessment Schedule 2.0, RAND 36-Item Short-Form Health Survey physical functioning scale (10 items), and 10-Meter Walk Test. The LLFDI-CAT was repeated in 2 to 8 days (mean=4.5 days). Pearson's r and the intraclass correlation coefficient (ICC) (2,1) were calculated to assess validity, group-level reliability, and participant-level reliability. Results A correlation of .74 for the LLFDI-CAT function scale and the RAND 36-Item Short-Form Health Survey physical functioning scale (10 items) was found. The correlations of the LLFDI-CAT disability scale with the World Health Organization Disability Assessment Schedule 2.0 and the 10-Meter Walk Test were −.57 and −.53, respectively. The ICC (2,1) of the LLFDI-CAT function scale was .84, with a group-level reliability score of .85. The ICC (2,1) of the LLFDI-CAT disability scale was .76, with a group-level reliability score of .81. Limitations The high percentage of women in the study and the exclusion of older adults with recent joint replacement or hospitalization limit the generalizability of the results. Conclusions The Dutch LLFDI-CAT showed strong validity and high reliability when used to assess physical function and disability in older adults dwelling in the community.
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Beauchamp, Marla K., Rachel E. Ward, Alan M. Jette, and Jonathan F. Bean. "Meaningful Change Estimates for the Late-Life Function and Disability Instrument in Older Adults." Journals of Gerontology: Series A 74, no. 4 (2018): 556–59. http://dx.doi.org/10.1093/gerona/gly230.

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Abstract Background The Late-Life Function and Disability Instrument (LLFDI) is a well-validated and frequently used patient-reported outcome for older adults. The aim of this study was to estimate the minimal clinically important difference (MCID) of the LLFDI-Function Component (LLFDI-FC) and its subscales among community-dwelling older adults with mobility limitations. Methods We performed a secondary analysis of the Boston Rehabilitative Impairment Study of the Elderly, a longitudinal cohort study of older adults with mobility limitations residing in the community. The MCID for each LLFDI-FC scale over 1 year of follow-up was estimated using both anchor- and distribution-based methods, including mean change scores on a patient-reported global rating of change in function scale, the standard error of measurement (SEM), and the minimal detectable change with 90% confidence (MDC90). Results Data from 320 older adults were used in the analysis (mean age 76 years, 69% female, mean of four chronic conditions). Meaningful change estimates for “small change” based on the global rating of change and SEM were 2, 3, 4, and 4 points for the LLFDI-FC overall function scale and basic lower-extremity, advanced lower-extremity, and upper-extremity subscales, respectively. Estimates for “substantial change” based on the global rating of change and minimal detectable change with 90% confidence were 5, 6, 9, and 10 points for the overall function scale and basic lower-extremity, advanced lower-extremity, and upper-extremity subscales, respectively. Conclusion This study provides the first MCID estimates for the LLFDI-FC, a widely used patient-reported measure of function. These values can be used to interpret the outcomes of longitudinal investigations of functional status in similar populations of community-dwelling older adults.
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Haley, Stephen M., Larry H. Ludlow, and Jill T. Kooyoomjian. "Extending the Range of Functional Assessment in Older Adults: Development of the Late-Life Function and Disability Instrument." Journal of Aging and Physical Activity 10, no. 4 (2002): 453–65. http://dx.doi.org/10.1123/japa.10.4.453.

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As a preliminary step in developing the physical-functioning measure of the Late-Life Function and Disability Instrument (LLFDI), the authors compared its items with the physical-functioning items (PF-10) on the SF-36 Health Survey. They compared the item coverage, hierarchy, and scale-separation properties of the PF-10 items with those of the physical-functioning items of the LLFDI. Both questionnaires were administered to 50 community-dwelling older adults. A partial-credit, 1-parameter, item-response-theory model was used to scale the items. The LLFDI improved the range of ability of daily activities that was encompassed by the PF-10 items by 46%. By sequentially deleting new items with poor fit to the overall scale and items with redundant content, the authors developed a scale more capable of accurately assessing low-functioning activities. The LLFDI function component incorporates a broader content range and better person and item separation than the PF-10 items. It appears to have potential as a comprehensive functional-activity assessment for community-dwelling older adults.
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Kupzyk, Kevin A., Yaewon Seo, Bernice Yates, Bunny Pozehl, Joseph Norman, and Brian Lowes. "Use of the Late-Life Function and Disability Instrument for Measuring Physical Functioning in Patients With Heart Failure." Journal of Nursing Measurement 24, no. 2 (2016): 323–36. http://dx.doi.org/10.1891/1061-3749.24.2.323.

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Background and Purpose: We evaluated the psychometric properties of the functioning component of the Late-Life Function and Disability Instrument (LLFDI) in individuals with heart failure (HF). Methods: Factor analyses were used (N = 151) to assess the dimensionality and structure of the basic and advanced lower extremity function subscales. Rasch model scores were compared to the raw means of the items. Results: Rasch scores correlated with the raw means of the items at r = .96, indicating raw means are comparable to the more complicated Rasch analysis in estimating physical functioning using the basic and advanced subscales. Conclusions: The lower extremity physical functioning subscales of the LLFDI have potential as a clinical assessment tool to identify HF patients who are at high risk for functional limitations.
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Puthoff, Michael L., and David H. Nielsen. "Relationships Among Impairments in Lower-Extremity Strength and Power, Functional Limitations, and Disability in Older Adults." Physical Therapy 87, no. 10 (2007): 1334–47. http://dx.doi.org/10.2522/ptj.20060176.

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Background and Purpose During the aging process, older adults may experience a loss of strength and power, which then may lead to functional limitations and disability. The purpose of this study was to examine how impairments in lower-extremity strength and power are related to functional limitations and disability in community-dwelling older adults. Subjects Thirty older adults (age [X̅±SD], 77.3±7.0 years; 25 women and 5 men) with mild to moderate functional limitations participated in this study. Methods Lower-extremity strength, peak power, power at a low relative intensity, and power at a high relative intensity were measured with a pneumatic resistance leg press. Functional limitations and disability were assessed with the Short Physical Performance Battery (SPPB), the Six-Minute Walk Test (SMWT), and the Late Life Function and Disability Instrument (LLFDI). Results All measures of strength and power were related to functional limitations. Peak power demonstrated the strongest relationships with SMWT, the SPPB gait speed subscale, and the LLFDI functional limitation component. Power at a high relative intensity demonstrated the strongest relationships to the SPPB total score and the SPPB sit-to-stand subscale score. All measures of strength and power were indirectly related to the LLFDI disability component. Discussion and Conclusion Older adults should focus on increasing and maintaining lower-extremity strength and power across a range of intensities in order to decrease functional limitations and disability.
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Park, Da Sol, and Hae Yean Park. "Reliability and Validity of the Korean Late-Life Function and Disability Instrument." Healthcare 9, no. 9 (2021): 1200. http://dx.doi.org/10.3390/healthcare9091200.

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The purpose of this study was to develop the Korean version of the Late-Life Function and Disability Instrument (K-LLFDI) and verify its reliability and validity. Fifty community-dwelling older adults aged 65 years and above with independent mobility were surveyed. The reliability and validity of the instrument were verified. The overall cultural validity of 48 items was evaluated as very high (0.95), and only one item that was not appropriate was revised. The reliability of the remaining six domains was either high or very high. Internal consistency was high (α = 0.859) in the Disability component of the instrument and very high (α = 0.914) in the Function component. The factor loading for 42 out of 48 items was above 0.04. Overall, each component was well reflected by the sub-items. The K-LLFDI is expected to be instrumental in solving the rapidly growing problems of community-dwelling older adults.
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Julius, Leslie M., Jennifer S. Brach, David M. Wert, and Jessie M. VanSwearingen. "Perceived Effort of Walking: Relationship With Gait, Physical Function and Activity, Fear of Falling, and Confidence in Walking in Older Adults With Mobility Limitations." Physical Therapy 92, no. 10 (2012): 1268–77. http://dx.doi.org/10.2522/ptj.20110326.

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BackgroundAlthough clinicians have a number of measures to use to describe walking performance, few, if any, of the measures capture a person's perceived effort in walking. Perceived effort of walking may be a factor in what a person does versus what he or she is able to do.ObjectiveThe objective of this study was to examine the relationship of perceived effort of walking with gait, function, activity, fear of falling, and confidence in walking in older adults with mobility limitations.DesignThis investigation was a cross-sectional, descriptive, relational study.MethodsThe study took place at a clinical research training center. The participants were 50 older adults (mean age=76.8 years, SD=5.5) with mobility limitations. The measurements used were the Rating of Perceived Exertion (RPE) for walking; gait speed; the Modified Gait Abnormality Rating Scale; energy cost of walking; Late Life Function and Disability Instrument (LLFDI) for total, basic, and advanced lower-extremity function and for disability limitations; activity and restriction subscales of the Survey of Activities and Fear of Falling in the Elderly (SAFFE); activity counts; SAFFE fear subscale; and Gait Efficacy Scale (GES). The relationship of the RPE of walking with gait, function, activity, fear, and confidence was determined by using Spearman rank order coefficients and an analysis of variance (adjusted for age and sex) for mean differences between groups defined by no exertion during walking and some exertion during walking.ResultsThe RPE was related to confidence in walking (GES, R=−.326, P=.021) and activity (activity counts, R=.295, P=.044). The RPE groups (no exertion versus some exertion) differed in LLFDI scores for total (57.9 versus 53.2), basic (68.6 versus 61.4), and advanced (49.1 versus 42.6) lower-extremity function; LLFDI scores for disability limitations (74.9 versus 67.5); SAFFE fear subscale scores (0.346 versus 0.643); and GES scores (80.1 versus 67.8) (all P<.05).LimitationsThe range of RPE scores for the participants studied was narrow. Thus, the real correlations between RPE and gait, physical function, and psychological aspects of walking may be greater than the relationships reported.ConclusionsThe perceived effort of walking was associated with physical activity and confidence in walking. Reducing the perceived effort of walking may be an important target of interventions to slow the decline in function of older adults with mobility limitations.
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Batsis, John A., Cassandra M. Germain, Elizabeth Vásquez, Alicia J. Zbehlik, and Stephen J. Bartels. "Physical Activity Predicts Higher Physical Function in Older Adults: The Osteoarthritis Initiative." Journal of Physical Activity and Health 13, no. 1 (2016): 6–16. http://dx.doi.org/10.1123/jpah.2014-0531.

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Objectives:Physical activity reduces mobility impairments in elders. We examined the association of physical activity on risk of subjective and objective physical function in adults with and at risk for osteoarthritis (OA).Methods:Adults aged ≥ 60 years from the longitudinal Osteoarthritis Initiative, a prospective observational study of knee OA, were classified by sex-specific quartiles of Physical Activity Score for the Elderly scores. Using linear mixed models, we assessed 6-year data on self-reported health, gait speed, Late-Life Function and Disability Index (LLFDI) and chair stand.Results:Of 2252 subjects, mean age ranged from 66 to 70 years. Within each quartile, physical component (PCS) of the Short Form-12 and gait speed decreased from baseline to follow-up in both sexes (all P < .001), yet the overall changes across PASE quartiles between these 2 time points were no different (P = .40 and .69, males and females, respectively). Decline in PCS occurred in the younger age group, but rates of change between quartiles over time were no different in any outcomes in either sex. LLFDI scores declined in the 70+ age group. Adjusting for knee extensor strength reduced the strength of association.Conclusions:Higher physical activity is associated with maintained physical function and is mediated by muscle strength, highlighting the importance of encouraging physical activity in older adults with and at risk for OA.
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Coni, Alice, Jeanine M. Van Ancum, Ronny Bergquist, et al. "Comparison of Standard Clinical and Instrumented Physical Performance Tests in Discriminating Functional Status of High-Functioning People Aged 61–70 Years Old." Sensors 19, no. 3 (2019): 449. http://dx.doi.org/10.3390/s19030449.

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Assessment of physical performance by standard clinical tests such as the 30-sec Chair Stand (30CST) and the Timed Up and Go (TUG) may allow early detection of functional decline, even in high-functioning populations, and facilitate preventive interventions. Inertial sensors are emerging to obtain instrumented measures that can provide subtle details regarding the quality of the movement while performing such tests. We compared standard clinical with instrumented measures of physical performance in their ability to distinguish between high and very high functional status, stratified by the Late-Life Function and Disability Instrument (LLFDI). We assessed 160 participants from the PreventIT study (66.3 ± 2.4 years, 87 females, median LLFDI 72.31, range: 44.33–100) performing the 30CST and TUG while a smartphone was attached to their lower back. The number of 30CST repetitions and the stopwatch-based TUG duration were recorded. Instrumented features were computed from the smartphone embedded inertial sensors. Four logistic regression models were fitted and the Areas Under the Receiver Operating Curve (AUC) were calculated and compared using the DeLong test. Standard clinical and instrumented measures of 30CST both showed equal moderate discriminative ability of 0.68 (95%CI 0.60–0.76), p = 0.97. Similarly, for TUG: AUC was 0.68 (95%CI 0.60–0.77) and 0.65 (95%CI 0.56–0.73), respectively, p = 0.26. In conclusion, both clinical and instrumented measures, recorded through a smartphone, can discriminate early functional decline in healthy adults aged 61–70 years.
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Guerra, Flora Pereira, Rosângela Corrêa Dias, Leani Souza Máximo Pereira, Luciana de Oliveira Assis, and Marcella Guimarães Assis. "Factors that impact functional performance of elderly with low back pain." Fisioterapia em Movimento 30, suppl 1 (2017): 63–73. http://dx.doi.org/10.1590/1980-5918.030.s01.ao06.

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Abstract Introduction: Low back pain is a common condition among older adults and an important cause of disability. Objective: To evaluate the relationship between functional performance of older adults with low back pain and the following variables: sociodemographic and clinical factors, self-perceived health and back pain beliefs. Methods: A cross-sectional study that used data from the Back Complaints in the Elders international consortium. Information about sociodemographic factors (sex, age, marital status, formal education), clinical factors (intensity and frequency of pain, comorbidities), self-perceived health, back pain beliefs and functional performance (measured by the disability component of the Late Life Function and Disability Instrument - LLFDI) were collected through self-report. 191 older adults above 60 years with a new episode of back complaints who did not have any cognitive disorder, visual or hearing impairment, or motor disabilities participated in the study. A bivariate analysis was conducted between each independent variable and each outcome. Associations with p < 0.20 were selected for the multiple linear regression analysis, which was carried out for each LLFDI domain. Results: The multiple regression coefficients of determination were significant despite the modest magnitude. The variables related to functional performance were back beliefs, self-perceived health, formal education, pain frequency and marital status. Conclusion: These results may contribute to the expansion of health professionals’ work in the therapeutic approach of low back pain, broadening its focus beyond clinical aspects in order to value beliefs of older adults and their self-perceived health.
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Dissertations / Theses on the topic "LLFDI"

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Chergui, Adel. "Överensstämmer Late-Life Function and Disability Instrument med fallrädsla hos äldre?" Thesis, Umeå universitet, Avdelningen för fysioterapi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-179603.

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Introduktion: Fallolyckor bland äldre orsakar stora samhällskostnader och bidrar även till stort lidande i det vardagliga livet. Bortsett från fysiska skador så är fallrädsla även ett stort folkhälsoproblem. Fallrädsla defineras som en upplevd frånvaro av trygghet för att hålla balans vid aktiviteter, som resulterar till en mängd olika hälsoproblem. Vanligtvis används Fall Efficacy Scale - International (FES-I) och Activities-specific Balance Confidence Scale (ABC-scale) som bedömningsinstrument för självskattning av fallrädsla. Däremot så saknas utvärdering av fallrädsla utifrån ett funktionellt perspektiv. Late-Life Function and Disability Instrument (LLFDI) är ett självskattningsformulär som ursprungligen utformats för bruk vid intervjuer för äldre 60 år och uppåt.Syfte: Syftet med denna studie var att undersöka om det finns ett samband mellan självskattad funktionsnivå enligt LLFDI samt självskattad fallrädsla enligt Iconographical - Falls Efficacy Scale (Icon-FES) och ABC scale bland äldre personer över 70 år. Delsyftet var att undersöka korrelationen bland de tre domänerna i LLFDI för att se vilka nedsättningar som korrelerar bäst med fallrädsla. Metod: Sambandet mellan skattad funktion enligt LLFDI samt upplevd fallrädsla enligt ABS-scale och Icon-FES undersöktes med Spearmans Rho i ett datamaterial med 67 deltagare över 70 år som deltagit i en tidigare studie av fallpreventiv träning. Resultat: En hög statistisk signifikant korrelation enligt Hinkel hittades mellan de funktionella domänerna hos LLFDI och ABC-scale (FU och GNE) och Icon-FES (FU och ANE). Måttliga korrelationer observerades även mellan LLFDI och ABC-scale (ANE) och Icon-FES (GNE). Enbart en domän övre extremitet visade väldigt låg korrelation med fallrädsla.  Slutsats: Eftersom hög korrelation kundes ses bidrar resultat stärker det sambandet mellan självskattad funktion och fallrädsla bland äldre som bor i en hemmiljö. Framtida studier bör undersöka resultatet bland ett könsuppdelat stickprov i form av en tvärsnittsstudie för att mäta prevalens av fallrädsla samt exponering av fysisk inaktivitet os deltagarna.
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Cardoso, Adnaldo Paulo. "Adaptação transcultural e análise da confiabilidade da versão brasileira da Late Life Function and Disability Instrument (LLFDI) em uma amostra de idosos com alta escolaridade no município de Belo Horizonte." Universidade Federal de Minas Gerais, 2013. http://hdl.handle.net/1843/BUOS-9MVLH9.

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The Late Fuction Life and Disability Instrument (LLFDI) was developed to be an assessment tool sensitive to significant changes in the components function and disability in daily activities of elderly community residents. Objectives: Adapting to Portuguese-Brazil and assess the intra-rater and inter the Brazilian version of LLFDI. Methods: To adapt the original U.S. version of LLFDI were involved five translators who performed two translations, a synthesis of the two translations, two back translations thereof, and a subsequent review and evaluation of semantic and cultural equivalence by a multidisciplinary committee. The intra-evaluator final Portuguese version of LLFDI was assessed by comparing the two assessments repeated by the same examiner in one week interval. Interrater reliability was tested by comparing the different raters, held on the same day. We evaluated 45 volunteers (70.13 ± 6.88), living in the community. Results: The reliability scores for limiting total and overall function were considered high reliability for both tests intra-rater (ICC = 0.91 and ICC = 0.97) and interrater (CCC CCC = 0.87 and = 0.92), respectively. Conclusion: The results demonstrate that the translation and adaptation of LLFDI- Brazil is reliable.<br>Resumo: O Late Life Fuction and Disability Instrument (LLFDI) foi desenvolvido para ser um instrumento de avaliação sensível a mudanças significativas nos componentes função e incapacidade das atividades cotidianas de idosos residentes na comunidade. Objetivos: Adaptar para o português-Brasil e avaliar a confiabilidade intra-avaliador e interavaliadores da versão brasileira do LLFDI. Métodos: Para a adaptação da versão original norte-americana do LLFDI foram envolvidos 5 tradutores que realizaram duas traduções, uma síntese das duas traduções, duas respectivas retrotraduções, e uma revisão e avaliação subseqüente de equivalência semântica e cultural por um comitê multidisciplinar. A confiabilidade intra-avaliador da versão final em português da LLFDI foi avaliada comparando-se duas avaliações repetidas pelo mesmo avaliador no intervalo de uma semana. A confiabilidade interavaliadores foi testada comparando-se as avaliações de diferentes avaliadores, realizadas no mesmo dia. Foram avaliados 45 voluntários (70,13 ± 6,88), residentes na comunidade. Resultados: A confiabilidade para os escores da limitação total e função total foi considerada alta para ambos os testes intra-avaliador (CCI= 0,91 e CCI=0,97) e interavaliadores (CCC= 0,87 e CCC= 0,92), respectivamente. Conclusão: Os resultados demonstram que a tradução e adaptação da LLFDI-Brasil mostra-se confiável.
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Castanheira, Patrícia Isabel Celeirós 1984. "Adaptação e validação para a cultura portuguesa da Late-Life Function and Disability Instrument (LLFDI)." Master's thesis, 2013. http://hdl.handle.net/10400.26/14482.

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Introdução:O envelhecimento pressupõe alterações no organismo, sendo fundamental a medição das limitações da funcionalidade e da incapacidade na execução de tarefas individuais e sociais por parte dos idosos. As guidelines da ACSM enfatizam que os idosos obtêm benefícios na saúde com a realização de atividade física regular. Objetivo: Adaptar e validar para a cultura portuguesa a Late-Life Function and Disability Instrument (LLFDI). Material e Métodos: A versão portuguesa foi obtida através de um processo de metodologia sequencial. Para avaliar a validade e fiabilidade, esta versão foi administrada a 619 idosos (72±9). Destes, 77 foram submetidos a uma intervenção de fisioterapia com base em dois programas de exercícios, para determinar o poder de resposta. Resultados: Após obtenção da equivalência semântica e de conteúdo, a versão portuguesa da LLFDI demonstrou valores elevados de reprodutibilidade (CCI_função > 0,8 e CCI_incapacidade > 0,7) e níveis bastantes aceitáveis de consistência interna (α Cronbach > 0,82). As correlações obtidas entre a LLFDI e o MOS SF-36 são moderadas a altas. A análise fatorial confirmatória demonstra um modelo ajustado para a componente função (relações positivas e muito fortes) e incapacidade (relações no limiar da aceitabilidade). O Poder de resposta de 4 semanas, demonstrou valores de ESS <0,30 (função) e <0,28 (incapacidade). Os valores de RMS encontram-se entre 0,40 e 0,72 (função) e entre 0,27 e 0,59 (incapacidade). Conclusões: A versão portuguesa da LLFDI demonstrou valores aceitáveis de validade e fiabilidade, revelando valores baixos de poder de resposta.
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Conference papers on the topic "LLFDI"

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Rodriguez, Joaquin, Alex Baldomero, Victor Montilla, and Jordi Mujal. "LLFI: Lateral Laser Fault Injection Attack." In 2019 Workshop on Fault Diagnosis and Tolerance in Cryptography (FDTC). IEEE, 2019. http://dx.doi.org/10.1109/fdtc.2019.00014.

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Aliabadi, Maryam Raiyat, Karthik Pattabiraman, and Nematollah Bidokhti. "Soft-LLFI: A Comprehensive Framework for Software Fault Injection." In 2014 IEEE International Symposium on Software Reliability Engineering Workshops (ISSREW). IEEE, 2014. http://dx.doi.org/10.1109/issrew.2014.114.

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Lu, Qining, Mostafa Farahani, Jiesheng Wei, Anna Thomas, and Karthik Pattabiraman. "LLFI: An Intermediate Code-Level Fault Injection Tool for Hardware Faults." In 2015 IEEE International Conference on Software Quality, Reliability and Security (QRS). IEEE, 2015. http://dx.doi.org/10.1109/qrs.2015.13.

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