Cross-cultural adaptation, reliability, and validity of the Vertigo symptom scale–short form in the central Kurdish dialect
Background Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported outcome measures (PROMs) have obtained acceptance and popularity in the specialty of vestibular disorders. In Kurdish, there is a critical sh...
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| Published in: | Health and quality of life outcomes Vol. 17; no. 1; pp. 125 - 12 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
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BioMed Central
17.07.2019
BioMed Central Ltd BMC |
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| ISSN: | 1477-7525, 1477-7525 |
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| Abstract | Background
Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported outcome measures (PROMs) have obtained acceptance and popularity in the specialty of vestibular disorders. In Kurdish, there is a critical shortage of such measures. The aim of this survey was to assess the psychometric properties of a central Kurdish version (VSS − SF − CK) of the Vertigo Symptom Scale−Short Form (VSS − SF).
Methods
The study utilized a regulated process of cross-cultural adaptation to produce the VSS − SF − CK. We examined its psychometric properties by using a cross-sectional survey. Owing to a non-normal distribution, both principal axis factoring and polychoric correlation were used to examine the structure. The internal consistency of the scales was evaluated using Cronbach’s alpha coefficient (α) and composite reliability. The discriminant validity was evaluated using the heterotrait–monotrait ratio of correlations (HTMT
.85
) and the Fornell-Larcker criterion. To assess convergent validity, the instrument was correlated with two comparators.
Results
The participants (
n
= 195) were composed of 165 patients with vestibular symptoms (mean − age 45 ± 15.8, range 61 years; 56.4% women) and 30 healthy participants (mean − age 35 ± 18.6; range 52 years; 60% women). Based on the scree plot, along with other criteria such as Horn’s parallel analysis and minimum average partial, two factors were extracted: vestibular (VSS − V) and autonomic-anxiety (VSS − AA). Both constructs showed a robust structure in terms of adequate loadings and weak cross-loadings. The scales’ αs were 0.81, 0.81, and 0.87 for VSS-V, VSS-AA, and the total scale (VSS − T), respectively. Discriminant validity was established with a value of 0.71 for HTMT (< 0.85). Spearman’s correlation supported the study’s hypotheses and confirmed the convergent validity. Intraclass correlation coefficients revealed high external reliability: test-retest results were 0.93, 0.94, and 0.97 for VSS-V, VSS − AA, and VSS − T, respectively.
Conclusion
Given a critical shortage in PROMs for the vestibular field, the psychometric properties of VSS − SF − CK were evaluated. The results were promising, as they revealed external consistency and construct validity. The goodness of fit indices showed that the VSS − SF − CK is a reliable and validated PROM that can be used by clinicians and researchers in the Kurdish-speaking population. |
|---|---|
| AbstractList | Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported outcome measures (PROMs) have obtained acceptance and popularity in the specialty of vestibular disorders. In Kurdish, there is a critical shortage of such measures. The aim of this survey was to assess the psychometric properties of a central Kurdish version (VSS - SF - CK) of the Vertigo Symptom Scale-Short Form (VSS - SF).BACKGROUNDCore vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported outcome measures (PROMs) have obtained acceptance and popularity in the specialty of vestibular disorders. In Kurdish, there is a critical shortage of such measures. The aim of this survey was to assess the psychometric properties of a central Kurdish version (VSS - SF - CK) of the Vertigo Symptom Scale-Short Form (VSS - SF).The study utilized a regulated process of cross-cultural adaptation to produce the VSS - SF - CK. We examined its psychometric properties by using a cross-sectional survey. Owing to a non-normal distribution, both principal axis factoring and polychoric correlation were used to examine the structure. The internal consistency of the scales was evaluated using Cronbach's alpha coefficient (α) and composite reliability. The discriminant validity was evaluated using the heterotrait-monotrait ratio of correlations (HTMT.85) and the Fornell-Larcker criterion. To assess convergent validity, the instrument was correlated with two comparators.METHODSThe study utilized a regulated process of cross-cultural adaptation to produce the VSS - SF - CK. We examined its psychometric properties by using a cross-sectional survey. Owing to a non-normal distribution, both principal axis factoring and polychoric correlation were used to examine the structure. The internal consistency of the scales was evaluated using Cronbach's alpha coefficient (α) and composite reliability. The discriminant validity was evaluated using the heterotrait-monotrait ratio of correlations (HTMT.85) and the Fornell-Larcker criterion. To assess convergent validity, the instrument was correlated with two comparators.The participants (n = 195) were composed of 165 patients with vestibular symptoms (mean - age 45 ± 15.8, range 61 years; 56.4% women) and 30 healthy participants (mean - age 35 ± 18.6; range 52 years; 60% women). Based on the scree plot, along with other criteria such as Horn's parallel analysis and minimum average partial, two factors were extracted: vestibular (VSS - V) and autonomic-anxiety (VSS - AA). Both constructs showed a robust structure in terms of adequate loadings and weak cross-loadings. The scales' αs were 0.81, 0.81, and 0.87 for VSS-V, VSS-AA, and the total scale (VSS - T), respectively. Discriminant validity was established with a value of 0.71 for HTMT (< 0.85). Spearman's correlation supported the study's hypotheses and confirmed the convergent validity. Intraclass correlation coefficients revealed high external reliability: test-retest results were 0.93, 0.94, and 0.97 for VSS-V, VSS - AA, and VSS - T, respectively.RESULTSThe participants (n = 195) were composed of 165 patients with vestibular symptoms (mean - age 45 ± 15.8, range 61 years; 56.4% women) and 30 healthy participants (mean - age 35 ± 18.6; range 52 years; 60% women). Based on the scree plot, along with other criteria such as Horn's parallel analysis and minimum average partial, two factors were extracted: vestibular (VSS - V) and autonomic-anxiety (VSS - AA). Both constructs showed a robust structure in terms of adequate loadings and weak cross-loadings. The scales' αs were 0.81, 0.81, and 0.87 for VSS-V, VSS-AA, and the total scale (VSS - T), respectively. Discriminant validity was established with a value of 0.71 for HTMT (< 0.85). Spearman's correlation supported the study's hypotheses and confirmed the convergent validity. Intraclass correlation coefficients revealed high external reliability: test-retest results were 0.93, 0.94, and 0.97 for VSS-V, VSS - AA, and VSS - T, respectively.Given a critical shortage in PROMs for the vestibular field, the psychometric properties of VSS - SF - CK were evaluated. The results were promising, as they revealed external consistency and construct validity. The goodness of fit indices showed that the VSS - SF - CK is a reliable and validated PROM that can be used by clinicians and researchers in the Kurdish-speaking population.CONCLUSIONGiven a critical shortage in PROMs for the vestibular field, the psychometric properties of VSS - SF - CK were evaluated. The results were promising, as they revealed external consistency and construct validity. The goodness of fit indices showed that the VSS - SF - CK is a reliable and validated PROM that can be used by clinicians and researchers in the Kurdish-speaking population. Background Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported outcome measures (PROMs) have obtained acceptance and popularity in the specialty of vestibular disorders. In Kurdish, there is a critical shortage of such measures. The aim of this survey was to assess the psychometric properties of a central Kurdish version (VSS - SF - CK) of the Vertigo Symptom Scale-Short Form (VSS - SF). Methods The study utilized a regulated process of cross-cultural adaptation to produce the VSS - SF - CK. We examined its psychometric properties by using a cross-sectional survey. Owing to a non-normal distribution, both principal axis factoring and polychoric correlation were used to examine the structure. The internal consistency of the scales was evaluated using Cronbach's alpha coefficient ([alpha]) and composite reliability. The discriminant validity was evaluated using the heterotrait-monotrait ratio of correlations (HTMT.sub..85) and the Fornell-Larcker criterion. To assess convergent validity, the instrument was correlated with two comparators. Results The participants (n = 195) were composed of 165 patients with vestibular symptoms (mean - age 45 [+ or -] 15.8, range 61 years; 56.4% women) and 30 healthy participants (mean - age 35 [+ or -] 18.6; range 52 years; 60% women). Based on the scree plot, along with other criteria such as Horn's parallel analysis and minimum average partial, two factors were extracted: vestibular (VSS - V) and autonomic-anxiety (VSS - AA). Both constructs showed a robust structure in terms of adequate loadings and weak cross-loadings. The scales' [alpha]s were 0.81, 0.81, and 0.87 for VSS-V, VSS-AA, and the total scale (VSS - T), respectively. Discriminant validity was established with a value of 0.71 for HTMT (< 0.85). Spearman's correlation supported the study's hypotheses and confirmed the convergent validity. Intraclass correlation coefficients revealed high external reliability: test-retest results were 0.93, 0.94, and 0.97 for VSS-V, VSS - AA, and VSS - T, respectively. Conclusion Given a critical shortage in PROMs for the vestibular field, the psychometric properties of VSS - SF - CK were evaluated. The results were promising, as they revealed external consistency and construct validity. The goodness of fit indices showed that the VSS - SF - CK is a reliable and validated PROM that can be used by clinicians and researchers in the Kurdish-speaking population. Keywords: Vestibular disorders, Psychometric properties, Non-normal distribution, Factor analysis, Polychoric correlation, Partial least squares, Vertigo and dizziness, Patient-reported outcome measures Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported outcome measures (PROMs) have obtained acceptance and popularity in the specialty of vestibular disorders. In Kurdish, there is a critical shortage of such measures. The aim of this survey was to assess the psychometric properties of a central Kurdish version (VSS - SF - CK) of the Vertigo Symptom Scale-Short Form (VSS - SF). The study utilized a regulated process of cross-cultural adaptation to produce the VSS - SF - CK. We examined its psychometric properties by using a cross-sectional survey. Owing to a non-normal distribution, both principal axis factoring and polychoric correlation were used to examine the structure. The internal consistency of the scales was evaluated using Cronbach's alpha coefficient ([alpha]) and composite reliability. The discriminant validity was evaluated using the heterotrait-monotrait ratio of correlations (HTMT.sub..85) and the Fornell-Larcker criterion. To assess convergent validity, the instrument was correlated with two comparators. The participants (n = 195) were composed of 165 patients with vestibular symptoms (mean - age 45 [+ or -] 15.8, range 61 years; 56.4% women) and 30 healthy participants (mean - age 35 [+ or -] 18.6; range 52 years; 60% women). Based on the scree plot, along with other criteria such as Horn's parallel analysis and minimum average partial, two factors were extracted: vestibular (VSS - V) and autonomic-anxiety (VSS - AA). Both constructs showed a robust structure in terms of adequate loadings and weak cross-loadings. The scales' [alpha]s were 0.81, 0.81, and 0.87 for VSS-V, VSS-AA, and the total scale (VSS - T), respectively. Discriminant validity was established with a value of 0.71 for HTMT (< 0.85). Spearman's correlation supported the study's hypotheses and confirmed the convergent validity. Intraclass correlation coefficients revealed high external reliability: test-retest results were 0.93, 0.94, and 0.97 for VSS-V, VSS - AA, and VSS - T, respectively. Given a critical shortage in PROMs for the vestibular field, the psychometric properties of VSS - SF - CK were evaluated. The results were promising, as they revealed external consistency and construct validity. The goodness of fit indices showed that the VSS - SF - CK is a reliable and validated PROM that can be used by clinicians and researchers in the Kurdish-speaking population. Background Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported outcome measures (PROMs) have obtained acceptance and popularity in the specialty of vestibular disorders. In Kurdish, there is a critical shortage of such measures. The aim of this survey was to assess the psychometric properties of a central Kurdish version (VSS − SF − CK) of the Vertigo Symptom Scale−Short Form (VSS − SF). Methods The study utilized a regulated process of cross-cultural adaptation to produce the VSS − SF − CK. We examined its psychometric properties by using a cross-sectional survey. Owing to a non-normal distribution, both principal axis factoring and polychoric correlation were used to examine the structure. The internal consistency of the scales was evaluated using Cronbach’s alpha coefficient (α) and composite reliability. The discriminant validity was evaluated using the heterotrait–monotrait ratio of correlations (HTMT .85 ) and the Fornell-Larcker criterion. To assess convergent validity, the instrument was correlated with two comparators. Results The participants ( n = 195) were composed of 165 patients with vestibular symptoms (mean − age 45 ± 15.8, range 61 years; 56.4% women) and 30 healthy participants (mean − age 35 ± 18.6; range 52 years; 60% women). Based on the scree plot, along with other criteria such as Horn’s parallel analysis and minimum average partial, two factors were extracted: vestibular (VSS − V) and autonomic-anxiety (VSS − AA). Both constructs showed a robust structure in terms of adequate loadings and weak cross-loadings. The scales’ αs were 0.81, 0.81, and 0.87 for VSS-V, VSS-AA, and the total scale (VSS − T), respectively. Discriminant validity was established with a value of 0.71 for HTMT (< 0.85). Spearman’s correlation supported the study’s hypotheses and confirmed the convergent validity. Intraclass correlation coefficients revealed high external reliability: test-retest results were 0.93, 0.94, and 0.97 for VSS-V, VSS − AA, and VSS − T, respectively. Conclusion Given a critical shortage in PROMs for the vestibular field, the psychometric properties of VSS − SF − CK were evaluated. The results were promising, as they revealed external consistency and construct validity. The goodness of fit indices showed that the VSS − SF − CK is a reliable and validated PROM that can be used by clinicians and researchers in the Kurdish-speaking population. Abstract Background Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported outcome measures (PROMs) have obtained acceptance and popularity in the specialty of vestibular disorders. In Kurdish, there is a critical shortage of such measures. The aim of this survey was to assess the psychometric properties of a central Kurdish version (VSS − SF − CK) of the Vertigo Symptom Scale−Short Form (VSS − SF). Methods The study utilized a regulated process of cross-cultural adaptation to produce the VSS − SF − CK. We examined its psychometric properties by using a cross-sectional survey. Owing to a non-normal distribution, both principal axis factoring and polychoric correlation were used to examine the structure. The internal consistency of the scales was evaluated using Cronbach’s alpha coefficient (α) and composite reliability. The discriminant validity was evaluated using the heterotrait–monotrait ratio of correlations (HTMT.85) and the Fornell-Larcker criterion. To assess convergent validity, the instrument was correlated with two comparators. Results The participants (n = 195) were composed of 165 patients with vestibular symptoms (mean − age 45 ± 15.8, range 61 years; 56.4% women) and 30 healthy participants (mean − age 35 ± 18.6; range 52 years; 60% women). Based on the scree plot, along with other criteria such as Horn’s parallel analysis and minimum average partial, two factors were extracted: vestibular (VSS − V) and autonomic-anxiety (VSS − AA). Both constructs showed a robust structure in terms of adequate loadings and weak cross-loadings. The scales’ αs were 0.81, 0.81, and 0.87 for VSS-V, VSS-AA, and the total scale (VSS − T), respectively. Discriminant validity was established with a value of 0.71 for HTMT (< 0.85). Spearman’s correlation supported the study’s hypotheses and confirmed the convergent validity. Intraclass correlation coefficients revealed high external reliability: test-retest results were 0.93, 0.94, and 0.97 for VSS-V, VSS − AA, and VSS − T, respectively. Conclusion Given a critical shortage in PROMs for the vestibular field, the psychometric properties of VSS − SF − CK were evaluated. The results were promising, as they revealed external consistency and construct validity. The goodness of fit indices showed that the VSS − SF − CK is a reliable and validated PROM that can be used by clinicians and researchers in the Kurdish-speaking population. Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported outcome measures (PROMs) have obtained acceptance and popularity in the specialty of vestibular disorders. In Kurdish, there is a critical shortage of such measures. The aim of this survey was to assess the psychometric properties of a central Kurdish version (VSS - SF - CK) of the Vertigo Symptom Scale-Short Form (VSS - SF). The study utilized a regulated process of cross-cultural adaptation to produce the VSS - SF - CK. We examined its psychometric properties by using a cross-sectional survey. Owing to a non-normal distribution, both principal axis factoring and polychoric correlation were used to examine the structure. The internal consistency of the scales was evaluated using Cronbach's alpha coefficient (α) and composite reliability. The discriminant validity was evaluated using the heterotrait-monotrait ratio of correlations (HTMT ) and the Fornell-Larcker criterion. To assess convergent validity, the instrument was correlated with two comparators. The participants (n = 195) were composed of 165 patients with vestibular symptoms (mean - age 45 ± 15.8, range 61 years; 56.4% women) and 30 healthy participants (mean - age 35 ± 18.6; range 52 years; 60% women). Based on the scree plot, along with other criteria such as Horn's parallel analysis and minimum average partial, two factors were extracted: vestibular (VSS - V) and autonomic-anxiety (VSS - AA). Both constructs showed a robust structure in terms of adequate loadings and weak cross-loadings. The scales' αs were 0.81, 0.81, and 0.87 for VSS-V, VSS-AA, and the total scale (VSS - T), respectively. Discriminant validity was established with a value of 0.71 for HTMT (< 0.85). Spearman's correlation supported the study's hypotheses and confirmed the convergent validity. Intraclass correlation coefficients revealed high external reliability: test-retest results were 0.93, 0.94, and 0.97 for VSS-V, VSS - AA, and VSS - T, respectively. Given a critical shortage in PROMs for the vestibular field, the psychometric properties of VSS - SF - CK were evaluated. The results were promising, as they revealed external consistency and construct validity. The goodness of fit indices showed that the VSS - SF - CK is a reliable and validated PROM that can be used by clinicians and researchers in the Kurdish-speaking population. |
| ArticleNumber | 125 |
| Audience | Academic |
| Author | Chalabi, Yousif Ibrahim Zmnako, Sherko Saeed F. |
| Author_xml | – sequence: 1 givenname: Sherko Saeed F. orcidid: 0000-0003-4659-2569 surname: Zmnako fullname: Zmnako, Sherko Saeed F. email: sherko.fathullah@univsul.edu.iq, sherko.zmnako@gmail.com organization: Department of Surgery-Otolaryngology, College of Medicine, University of Sulaimani – sequence: 2 givenname: Yousif Ibrahim surname: Chalabi fullname: Chalabi, Yousif Ibrahim organization: Department of Surgery-Otolaryngology, College of Medicine, University of Sulaimani |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/31315639$$D View this record in MEDLINE/PubMed |
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| CitedBy_id | crossref_primary_10_1016_j_techsoc_2023_102225 crossref_primary_10_1007_s12671_023_02299_x crossref_primary_10_1186_s12955_019_1209_7 crossref_primary_10_3390_su142316047 crossref_primary_10_1186_s12891_021_04255_z crossref_primary_10_1186_s13023_024_03022_2 |
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| Keywords | Vestibular disorders Factor analysis Non-normal distribution Vertigo and dizziness Polychoric correlation Partial least squares Psychometric properties Patient−reported outcome measures |
| Language | English |
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| PublicationTitle | Health and quality of life outcomes |
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Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported... Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported outcome... Background Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated patient-reported... Abstract Background Core vestibular symptoms are vague, hard for patients to describe, and difficult for examiners to quantify. Reliable and validated... |
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| SubjectTerms | Analysis Factor analysis Health aspects Kurds Medicine Medicine & Public Health Non-normal distribution Partial least squares Polychoric correlation Proms (Parties) Psychometric properties Quality of Life Research Shortages Signs and symptoms Vertigo Vestibular diseases Vestibular disorders |
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| Title | Cross-cultural adaptation, reliability, and validity of the Vertigo symptom scale–short form in the central Kurdish dialect |
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