Polish Cross-Cultural Adaptation of the Lower Limb Functional Index (LLFI) Demonstrates a Valid Outcome Measure for the Lower Limb Region and Joints

This study aimed to perform linguistic and cross-cultural adaptation to establish a Polish version of the Lower Limb Functional Index (LLFI) as well as an evaluation of the psychometric properties. This was a two-stage, cross-sectional study. The first stage—linguistic and cultural adaptation, complied with the International Society for Pharmacoeconomics and Outcomes Research guidelines to produce the Lower Limb Functional Index, Polish version (LLFI-PL). The subjects were recruited to the second stage of the study from a sample of convenience (n = 125, age x- = 52.86 ± 19.53 years, 56% female, symptoms duration x- = 17.69 ± 18.39 weeks). Baseline reliability was performed on the LLFI-PL with retest period at 3–7 days. The Western Ontario and McMaster University Osteoarthritis Index (WOMAC), EuroQol Health Questionnaire 5-Dimensions 5-Level (EQ-5D-5L), and an 11-point Pain Numerical Rating Scale (P-NRS) were completed to assess the validity of the LLFI-PL. Statistical analysis showed high internal consistency (α = 0.94), and excellent test–retest reliability (ICC2.1 = 0.96). The measurement error was SEM = 1.69% with MDC90 = 3.93%. Construct validity demonstrated strong correlations between the LLFI-PL and WOMAC (r = 0.81) and moderate correlations with the EQ-5D-5L (r = −0.63) and P-NRS (r = −0.39). Exploratory factor analysis confirmed a single-factor structure. The LLFI-PL is a psychometrically sound questionnaire for Polish-speaking patients with lower limb musculoskeletal conditions. The results support findings from the previous original English, Spanish, and Turkish versions.

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

10.21203/rs.2.19150/v1 ◽

2019 ◽

Author(s):

Agnieszka Bejer ◽

Agnieszka Podufały ◽

Sylwia Kyc ◽

Magdalena Michałek ◽

Piotr Mataczyński ◽

...

Keyword(s):

Factor Structure ◽

Internal Consistency ◽

Lower Limb ◽

Cultural Adaptation ◽

Error Score ◽

Cross Cultural ◽

Functional Index ◽

Cross Cultural Adaptation ◽

Patient Reported ◽

Polish Version

Abstract 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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Polish Cross-cultural Adaptation of the Lower Limb Functional Index (LLFI) demonstrates a Valid Outcome Measure for the Lower Limb Region and Joints

10.21203/rs.3.rs-25953/v2 ◽

2020 ◽

Author(s):

Agnieszka Bejer ◽

Agnieszka Podufały ◽

Sylwia Kyc ◽

Magdalena Michałek ◽

Piotr Mataczyński ◽

...

Keyword(s):

Factor Structure ◽

Internal Consistency ◽

Lower Limb ◽

Cultural Adaptation ◽

Error Score ◽

Cross Cultural ◽

Functional Index ◽

Cross Cultural Adaptation ◽

Patient Reported ◽

Polish Version

Abstract 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). This was a two-stage, cross-sectional study with repeated measures on two variables during retest examination. The study recruited n=125 subjects (age =52.86±19.53 years, range 20-87, 56% female, injury duration =17.69±18.39 weeks, range 5-71). Baseline reliability and construct 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 (NRS), 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 high internal consistency (α=0.94) that is below the 0.95 threshold limit, and excellent test-retest reliability (ICC2.1=0.96). The error score found the SEM=4.85% with MDC90=11.3%. 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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Polish Cross-Cultural Adaptation of the Lower Limb Functional Index (LLFI) Demonstrates a Valid Outcome Measure for the Lower Limb Region and Joints

10.21203/rs.3.rs-25953/v1 ◽

2020 ◽

Author(s):

Agnieszka Bejer ◽

Agnieszka Podufały ◽

Sylwia Kyc ◽

Magdalena Michałek ◽

Piotr Mataczyński ◽

...

Keyword(s):

Factor Structure ◽

Internal Consistency ◽

Lower Limb ◽

Cultural Adaptation ◽

Error Score ◽

Cross Cultural ◽

Functional Index ◽

Cross Cultural Adaptation ◽

Patient Reported ◽

Polish Version

Abstract 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 MDC90 = 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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Oral health as predictors of family functioning: A cross-cultural adaptation and validation of Hindi version of family impact scale – A cross-sectional study

Pediatric Dental Journal ◽

10.1016/j.pdj.2021.01.006 ◽

2021 ◽

Author(s):

Bharathi M. Purohit ◽

Abhinav Singh ◽

Ashish Dwivedi ◽

Abhishek Purohit

Keyword(s):

Oral Health ◽

Family Functioning ◽

Cultural Adaptation ◽

Cross Sectional Study ◽

Cross Cultural ◽

Family Impact ◽

Sectional Study ◽

Cross Sectional ◽

Cross Cultural Adaptation ◽

Impact Scale

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Translation, Cultural Adaptation and Validation of The Caregiver Well-Being Scale (CWBS) in Iranian Schizophrenia Caregivers: A Methodological and Cross-Sectional Study

10.21203/rs.3.rs-113686/v1 ◽

2020 ◽

Author(s):

Shahpar Bagheri ◽

Ladan Zarshenas ◽

Mahnaz Rakhshan ◽

Farkhondeh Sharif ◽

Ebrahim Moghimi Sarani ◽

...

Keyword(s):

Cultural Adaptation ◽

Well Being ◽

Cross Sectional Study ◽

Cross Cultural ◽

Divergent Validity ◽

Sectional Study ◽

Cross Sectional ◽

Cross Cultural Adaptation ◽

Persian Version ◽

Convergent And Divergent Validity

Abstract Background: Family caregivers of individual with schizophrenia experience various stresses in everyday life which have a negative impact on their well-being. The Caregiver Well-Being Scale(CWBS) is an instrument with psychometrics properties that identifies many important factors associated with caregiving stressors, and provides a picture of overall felt well-being. Since, there is no Persian version of this instrument for investigating schizophrenia caregiver’s well-being, cross cultural adaptation and evaluation of the psychometric properties of the CWBS among Iranian Schizophrenia caregivers is required.Methods: A methodological and cross-sectional study was conducted with 144 Schizophrenia caregivers in psychiatric centers affiliated to Shiraz University of Medical Sciences(SUMS), in the south of Iran. Persian version of the CWBS was generated in two phases: Phase 1 – Cross-cultural adaptation using forward translation and backward translation methods in five stages. Phase 2 – Psychometric properties test involved assessing content validity, construct validity by exploratory factor analysis and convergent and divergent validity, reliability by internal consistency and test –retest.Results: The translation, cross-cultural adaptation and qualitative content validity resulted in some semantic modifications to the original CWBS version. Both subscales of CWBS -(Basic Need(BN) and Activities of Daily living (ADL)- showed a signiﬁcant strong positive correlation with total CWBS, (BN: r = 0.81 and ADL: r= 0.88), moderate positive correlation with SOC (BN: r = 0.42 and ADL: r = 0.46), and moderate negative correlation with CBI (BN: r = -0.38 and ADL: r= -0.47) (all p<0.001), presenting convergent and divergent validity. Factor analysis and Varimax Rotation provide evidence that the Persian version encompasses three underlying constructs for ADL and BN, as the original scale. The CWBS showed acceptable internal consistency (Cronbach’s alpha: 0. 0.842) and satisfactory test-retest reliability within 2.5 weeks interval (intraclass correlation coefficient was 0.872 (95% confidence interval [CI], 0.827 to 0.906)) for 14 items.Conclusions: The results showed the Persian adapted version of CWBS complies the validity and reliability of the criteria required. The scale can be employed in practice and research to assess well-being in Iranian caregivers of individuals with schizophrenia. Registration number: (registration no.97-01-08-18819).

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