Cross-cultural adaptation, reliability and validity of the Turkish version of the Lower Limb Functional Index

Durutürk, Neslihan; Tonga, Eda; Gabel, Charles Philip; Acar, Manolya; Tekindal, Mustafa Agâh

doi:10.3109/09638288.2015.1024342

Cited by 21 publications

(45 citation statements)

References 34 publications

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“…The EFA of the LLFI-PL confirmed a single-factor structure, though the presence of a possible inflection at point-2 in the scree plot suggests that a modification to the questionnaire may be necessary, such as shortening to remove potential redundant items. This is consistent with the recommendations of previous authors [11,13,14].…”

Section: Discussionsupporting

confidence: 93%

“…This study's results demonstrated the LLFI-PL has comparable psychometric properties to the original-English, Spanish, and Turkish versions [11,13,14]. The internal consistency (α = 0.94) is slightly higher than the original and Spanish versions (α = 0.91) [11,13] and notably more than the Turkish (α = 0.82) [14].…”

Section: Discussionmentioning

confidence: 61%

“…The test-retest reliability (ICC 2.1 =0.96, at 6-days average) is identical to the Spanish version (ICC 2.1 =0.96, at 7-days) [13] and comparable to both the original and Turkish versions (at three-days, ICC 2.1 =0.97) [11,14].…”

Section: Discussionmentioning

confidence: 71%

“…From the perspective of practical characteristics, the LLFI demonstrated brevity, ready transferability to a 100-point scale, ease and rapidity of completion and scoring, low missing responses, and suitable readability [11]. These clinimetric properties were reinforced with the scale's adaptation to Spanish [13] and Turkish [14].…”

Section: Introductionmentioning

confidence: 92%

“…The sample size was pre-selected on the basis of a literature review concerning the creation of the LLFI questionnaire and other language validations [11,13,14]. The sample size was also based on Altman's recommendations of > 50 subjects in a methods comparison study [23].…”

Section: Sample Sizementioning

confidence: 99%

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Cross-cultural Adaptation and Validation of the Polish Version of the Lower Limb Functional Index

Bejer¹,

Podufały²,

Kyc³

et al. 2019

Preprint

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Background: Patient reported outcome measures (PROMs) are recommended to enable the standardization of collected data and provide accurate representation of the patients’ subjective opinions of their functional capabilities. The purpose of this study was to perform linguistic and cross-cultural adaptation to establish a Polish version of the Lower Limb Functional Index (LLFI), and to evaluate the psychometric properties of internal consistency, reliability, error score, validity, and factor structure with standardized criteria PROMs in a population with lower limb problems. Methods: Linguistic and cultural adaptation complied with the International Society for Pharmacoeconomics and Outcomes Research (ISPOR) guidelines to produce the Lower Limb Functional Index-Polish version (LLFI-PL). The study recruited subjects (n=125, age =52.86±19.53 years, range 20-87, 56% female, injury duration =17.69±18.39 weeks, range 5-71). Baseline reliability and criterion validity included the LLFI-PL, Western Ontario and McMaster University Osteoarthritis Index (WOMAC), Euroqol Health Questionnaire 5-Dimensions (EQ-5D-5L), and an 11-point pain Numerical Rating Scale, with retest at 3-7 days. Practicality for readability was considered within the face and content validity. Completion and scoring time were also calculated. Results: Statistical analysis showed excellent internal consistency ( α =0.94) and high test-retest reliability (ICC=0.96). The error score found the SEM=3.49% with MDC 90 =8.11%. Validity analysis showed strong correlations between the LLFI-PL with the WOMAC (r=-0.81) and moderate with the EQ-5D-5L (r=-0.63). Exploratory factor analysis confirmed a single-factor structure. Times for completion (172±33 seconds) and scoring (20±9 seconds) were determined. Conclusions: The LLFI-PL is a psychometrically sound questionnaire for Polish-speaking patients with lower limb musculoskeletal conditions. The results support the findings of previous original-English, Spanish, and Turkish versions for internal consistency, validity, reliability, error score, and factor structure.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 92%

Section: Sample Sizementioning

confidence: 99%

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Cross-cultural Adaptation and Validation of the Polish Version of the Lower Limb Functional Index

Bejer¹,

Podufały²,

Kyc³

et al. 2019

Preprint

Self Cite

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The effect of high-intensity laser therapy on pain and lower extremity function in patellofemoral pain syndrome: a single-blind randomized controlled trial

Ozlu,

Atilgan

2024

Lasers Med Sci

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Patellofemoral pain syndrome (PFPS) is a set of symptoms that negatively affect the daily life activities of the individual, leading to functional disability and significant loss of labor, especially in young adults. PFPS is usually due to weakness of the vastus medialis obliquus (VMO) resulting in abnormal patellar tracking and pain. Our study aims to compare the efficacy of high-intensity laser therapy (HILT) on pain and lower extremity function in the treatment of PFPS with different electrophysical agents (EPAs). The study was designed as a single-blind randomized controlled trial. Forty-five people with PFPS (aged 25–45 years) were included in the study. The patients were randomly divided into three groups and a total of ten sessions of treatment were administered to all three groups for 2 weeks, 5 days a week. High-intensity laser (HILT) and exercise program were applied to group 1. Ultrasound (US), transcutaneous electrical nerve stimulation (TENS), and exercise program were applied to group 2. In group 3, US, interferential current (IFC), and exercise program were applied. Both groups underwent three evaluations: pre-treatment, post-treatment, and 12 weeks after treatment. Outcome measures included the visual analog scale for pain severity (VAS), knee flexion range of motion (FROM), Q angle, pain threshold, muscle strength of quadriceps and hamstring, Kujala patellofemoral scoring, lower extremity functional scale (LEFS), and Timed Up and Go Test (TUG). The ANOVA was used for comparing the data of the groups, and two-way repeated measure ANOVA was used to compare at the pre-post and post-intervention 3rd month. The LSD and Bonferroni post hoc tests were also used to identify the between-group differences. Groups 2 and 3 were statistically effective in pain and functionality (p < 0.05). Group 1 was found to be statistically more effective than other groups in reducing pain (95% confidence interval (CI), 0.000/0.000; p = 0.000), increasing knee flexion angle (95% CI, 127.524/135.809; p = 0.000), and increasing lower extremity function (95% CI, 75.970/79.362; p = 0.000). This study indicated that high-intensity laser therapy was found to be a more effective method in the treatment of patellofemoral pain syndrome after 3 months of follow-up compared to US-TENS combination and US-interferential current combination treatments. Also, HILT can be used as an effective method in combination with an appropriate exercise program including vastus medialis strengthening to reduce pain and increase functionality in the patients with PFPS.

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Lower limb functional status and its determinants in moderate/major burns 3–6 months following injury: A two-center observational study

Özkal

Seyyah

Topuz

et al. 2021

Burns

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Cross-cultural adaptation, reliability and validity of the Turkish version of the Lower Limb Functional Index

Cited by 21 publications

References 34 publications

Cross-cultural Adaptation and Validation of the Polish Version of the Lower Limb Functional Index

Cross-cultural Adaptation and Validation of the Polish Version of the Lower Limb Functional Index

The effect of high-intensity laser therapy on pain and lower extremity function in patellofemoral pain syndrome: a single-blind randomized controlled trial

Lower limb functional status and its determinants in moderate/major burns 3–6 months following injury: A two-center observational study

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