Development and validation of the 40-item Glaucoma Visual Functioning Questionnaire
AimsTo evaluate the psychometric properties of a newly designed questionnaire, the 40-item Glaucoma Visual Functioning Questionnaire (GVFQ-40), in a Chinese sample to capture the visual ability of patients with glaucomatous vision impairment in five domains.MethodsEighty-four glaucoma suspects (cont...
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| Veröffentlicht in: | British journal of ophthalmology 2023-08, Vol.107 (8), p.1086-1091 |
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| creator | Huang, Haishun Lin, Junxiong Luo, Man Li, Zhidong Zhu, Yingting Han, Jiaxu Jin, Ling Li, Yiqing Zhuo, Yehong |
| description | AimsTo evaluate the psychometric properties of a newly designed questionnaire, the 40-item Glaucoma Visual Functioning Questionnaire (GVFQ-40), in a Chinese sample to capture the visual ability of patients with glaucomatous vision impairment in five domains.MethodsEighty-four glaucoma suspects (controls) and 270 glaucoma patients were recruited from the Glaucoma Clinic at Zhongshan Ophthalmic Centre in this cross-sectional, observational study. All subjects completed two questionnaires during routine clinical visits: the GVFQ-40 and the validated National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25). The discriminant, criterion-related and construct validity of the GVFQ-40 were assessed. A subset of subjects completed the GVFQ-40 twice, with an interval of 7–21 days, to determine test–retest reliability.ResultsDomain-specific and total GVFQ-40 scores were significantly higher (worse visual ability) in glaucoma patients than in controls (all p |
| doi_str_mv | 10.1136/bjophthalmol-2021-320985 |
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All subjects completed two questionnaires during routine clinical visits: the GVFQ-40 and the validated National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25). The discriminant, criterion-related and construct validity of the GVFQ-40 were assessed. A subset of subjects completed the GVFQ-40 twice, with an interval of 7–21 days, to determine test–retest reliability.ResultsDomain-specific and total GVFQ-40 scores were significantly higher (worse visual ability) in glaucoma patients than in controls (all p<0.001). All pairwise subgroup comparisons were statistically significant except for the ‘mobility’ domain comparison between the mild visual field loss and control groups (p=0.189). Significant differences between these two groups were observed in only 2 of the 12 dimensions on the NEI VFQ-25. The GVFQ-40 results demonstrated strong correlations with better-eye mean deviation and Visual Field Index (glaucoma severity measures). Exploratory factor analysis tended to confirm a three-domain structure. Test–retest intraclass correlation coefficients were higher than 0.927 for domain-specific and total GVFQ-40 scores.ConclusionsThe GVFQ-40 possesses good validity and reliability. It can be used to evaluate the impact of glaucomatous damage on visual ability and has potential in the evaluation of intervention efficacy.Trial registration numberNCT04722861.</description><identifier>ISSN: 0007-1161</identifier><identifier>EISSN: 1468-2079</identifier><identifier>DOI: 10.1136/bjophthalmol-2021-320985</identifier><identifier>PMID: 35379597</identifier><language>eng</language><publisher>BMA House, Tavistock Square, London, WC1H 9JR: BMJ Publishing Group Ltd</publisher><subject>Blindness ; Clinical Science ; Cross-Sectional Studies ; Diabetes ; Diabetic retinopathy ; Eye diseases ; Focus groups ; Glaucoma ; Glaucoma - diagnosis ; Humans ; Laboratories ; Ophthalmology ; Patients ; Quality of Life ; Questionnaires ; Rehabilitation ; Reproducibility of Results ; Sickness Impact Profile ; Strabismus ; Surveys and Questionnaires ; Validity ; Vision ; Vision Disorders - diagnosis ; Visual impairment</subject><ispartof>British journal of ophthalmology, 2023-08, Vol.107 (8), p.1086-1091</ispartof><rights>Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.</rights><rights>Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.</rights><rights>2022 Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. http://creativecommons.org/licenses/by-nc/4.0/ This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/ . Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2023 Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. http://creativecommons.org/licenses/by-nc/4.0/ This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/ . Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. 2023</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-b467t-b28451135a9ecffb7d4a63d1f3cd70d0d996553393f21e43f1c38c0700a5ab693</cites><orcidid>0000-0003-3247-7199</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC10359518/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC10359518/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,885,27924,27925,53791,53793</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/35379597$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Huang, Haishun</creatorcontrib><creatorcontrib>Lin, Junxiong</creatorcontrib><creatorcontrib>Luo, Man</creatorcontrib><creatorcontrib>Li, Zhidong</creatorcontrib><creatorcontrib>Zhu, Yingting</creatorcontrib><creatorcontrib>Han, Jiaxu</creatorcontrib><creatorcontrib>Jin, Ling</creatorcontrib><creatorcontrib>Li, Yiqing</creatorcontrib><creatorcontrib>Zhuo, Yehong</creatorcontrib><title>Development and validation of the 40-item Glaucoma Visual Functioning Questionnaire</title><title>British journal of ophthalmology</title><addtitle>Br J Ophthalmol</addtitle><addtitle>Br J Ophthalmol</addtitle><description>AimsTo evaluate the psychometric properties of a newly designed questionnaire, the 40-item Glaucoma Visual Functioning Questionnaire (GVFQ-40), in a Chinese sample to capture the visual ability of patients with glaucomatous vision impairment in five domains.MethodsEighty-four glaucoma suspects (controls) and 270 glaucoma patients were recruited from the Glaucoma Clinic at Zhongshan Ophthalmic Centre in this cross-sectional, observational study. All subjects completed two questionnaires during routine clinical visits: the GVFQ-40 and the validated National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25). The discriminant, criterion-related and construct validity of the GVFQ-40 were assessed. A subset of subjects completed the GVFQ-40 twice, with an interval of 7–21 days, to determine test–retest reliability.ResultsDomain-specific and total GVFQ-40 scores were significantly higher (worse visual ability) in glaucoma patients than in controls (all p<0.001). All pairwise subgroup comparisons were statistically significant except for the ‘mobility’ domain comparison between the mild visual field loss and control groups (p=0.189). Significant differences between these two groups were observed in only 2 of the 12 dimensions on the NEI VFQ-25. The GVFQ-40 results demonstrated strong correlations with better-eye mean deviation and Visual Field Index (glaucoma severity measures). Exploratory factor analysis tended to confirm a three-domain structure. Test–retest intraclass correlation coefficients were higher than 0.927 for domain-specific and total GVFQ-40 scores.ConclusionsThe GVFQ-40 possesses good validity and reliability. It can be used to evaluate the impact of glaucomatous damage on visual ability and has potential in the evaluation of intervention efficacy.Trial registration numberNCT04722861.</description><subject>Blindness</subject><subject>Clinical Science</subject><subject>Cross-Sectional Studies</subject><subject>Diabetes</subject><subject>Diabetic retinopathy</subject><subject>Eye diseases</subject><subject>Focus groups</subject><subject>Glaucoma</subject><subject>Glaucoma - diagnosis</subject><subject>Humans</subject><subject>Laboratories</subject><subject>Ophthalmology</subject><subject>Patients</subject><subject>Quality of Life</subject><subject>Questionnaires</subject><subject>Rehabilitation</subject><subject>Reproducibility of Results</subject><subject>Sickness Impact Profile</subject><subject>Strabismus</subject><subject>Surveys and Questionnaires</subject><subject>Validity</subject><subject>Vision</subject><subject>Vision Disorders - diagnosis</subject><subject>Visual impairment</subject><issn>0007-1161</issn><issn>1468-2079</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>9YT</sourceid><sourceid>ACMMV</sourceid><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><recordid>eNqFkUtv1DAUhS0EotPCX0CW2LAJ2L5-xCuEWtoiVUKIx9ZyHKfjkWMPcTIS_x5HU0phAStf-373-B4dhDAlrykF-abb5f123to45tgwwmgDjOhWPEIbymVbn5R-jDaEENVQKukJOi1lV69MUvUUnYAApYVWG_T5wh98zPvRpxnb1OODjaG3c8gJ5wHPW485acLsR3wV7eLyaPG3UBYb8eWS3MqFdIs_Lb6sdbJh8s_Qk8HG4p_fnWfo6-X7L-fXzc3Hqw_n726ajks1Nx1ruah2hNXeDUOnem4l9HQA1yvSk15rKQSAhoFRz2GgDlpHFCFW2E5qOENvj7r7pRt976qFyUazn8Jopx8m22D-7KSwNbf5YCgBoQVtq8KrO4Upf18tmDEU52O0yeelGCa5YhQ4hYq-_Avd5WVK1Z9hLWipeN32n5TkUstWAqlUe6TclEuZ_HC_MyVmDdg8DNisAZtjwHX0xUPP94O_Eq0APwLduPv9-X91fwKzRLZ0</recordid><startdate>20230801</startdate><enddate>20230801</enddate><creator>Huang, Haishun</creator><creator>Lin, Junxiong</creator><creator>Luo, Man</creator><creator>Li, Zhidong</creator><creator>Zhu, Yingting</creator><creator>Han, Jiaxu</creator><creator>Jin, Ling</creator><creator>Li, Yiqing</creator><creator>Zhuo, Yehong</creator><general>BMJ Publishing Group Ltd</general><general>BMJ Publishing Group LTD</general><general>BMJ Publishing Group</general><scope>9YT</scope><scope>ACMMV</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BTHHO</scope><scope>CCPQU</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>K9.</scope><scope>M0S</scope><scope>M1P</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0003-3247-7199</orcidid></search><sort><creationdate>20230801</creationdate><title>Development and validation of the 40-item Glaucoma Visual Functioning Questionnaire</title><author>Huang, Haishun ; Lin, Junxiong ; Luo, Man ; Li, Zhidong ; Zhu, Yingting ; Han, Jiaxu ; Jin, Ling ; Li, Yiqing ; Zhuo, Yehong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-b467t-b28451135a9ecffb7d4a63d1f3cd70d0d996553393f21e43f1c38c0700a5ab693</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Blindness</topic><topic>Clinical Science</topic><topic>Cross-Sectional Studies</topic><topic>Diabetes</topic><topic>Diabetic retinopathy</topic><topic>Eye diseases</topic><topic>Focus groups</topic><topic>Glaucoma</topic><topic>Glaucoma - diagnosis</topic><topic>Humans</topic><topic>Laboratories</topic><topic>Ophthalmology</topic><topic>Patients</topic><topic>Quality of Life</topic><topic>Questionnaires</topic><topic>Rehabilitation</topic><topic>Reproducibility of Results</topic><topic>Sickness Impact Profile</topic><topic>Strabismus</topic><topic>Surveys and Questionnaires</topic><topic>Validity</topic><topic>Vision</topic><topic>Vision Disorders - diagnosis</topic><topic>Visual impairment</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Huang, Haishun</creatorcontrib><creatorcontrib>Lin, Junxiong</creatorcontrib><creatorcontrib>Luo, Man</creatorcontrib><creatorcontrib>Li, Zhidong</creatorcontrib><creatorcontrib>Zhu, Yingting</creatorcontrib><creatorcontrib>Han, Jiaxu</creatorcontrib><creatorcontrib>Jin, Ling</creatorcontrib><creatorcontrib>Li, Yiqing</creatorcontrib><creatorcontrib>Zhuo, Yehong</creatorcontrib><collection>BMJ Open Access Journals</collection><collection>BMJ Journals:Open Access</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central</collection><collection>BMJ Journals</collection><collection>ProQuest One Community College</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>British journal of ophthalmology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Huang, Haishun</au><au>Lin, Junxiong</au><au>Luo, Man</au><au>Li, Zhidong</au><au>Zhu, Yingting</au><au>Han, Jiaxu</au><au>Jin, Ling</au><au>Li, Yiqing</au><au>Zhuo, Yehong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Development and validation of the 40-item Glaucoma Visual Functioning Questionnaire</atitle><jtitle>British journal of ophthalmology</jtitle><stitle>Br J Ophthalmol</stitle><addtitle>Br J Ophthalmol</addtitle><date>2023-08-01</date><risdate>2023</risdate><volume>107</volume><issue>8</issue><spage>1086</spage><epage>1091</epage><pages>1086-1091</pages><issn>0007-1161</issn><eissn>1468-2079</eissn><abstract>AimsTo evaluate the psychometric properties of a newly designed questionnaire, the 40-item Glaucoma Visual Functioning Questionnaire (GVFQ-40), in a Chinese sample to capture the visual ability of patients with glaucomatous vision impairment in five domains.MethodsEighty-four glaucoma suspects (controls) and 270 glaucoma patients were recruited from the Glaucoma Clinic at Zhongshan Ophthalmic Centre in this cross-sectional, observational study. All subjects completed two questionnaires during routine clinical visits: the GVFQ-40 and the validated National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25). The discriminant, criterion-related and construct validity of the GVFQ-40 were assessed. A subset of subjects completed the GVFQ-40 twice, with an interval of 7–21 days, to determine test–retest reliability.ResultsDomain-specific and total GVFQ-40 scores were significantly higher (worse visual ability) in glaucoma patients than in controls (all p<0.001). All pairwise subgroup comparisons were statistically significant except for the ‘mobility’ domain comparison between the mild visual field loss and control groups (p=0.189). Significant differences between these two groups were observed in only 2 of the 12 dimensions on the NEI VFQ-25. The GVFQ-40 results demonstrated strong correlations with better-eye mean deviation and Visual Field Index (glaucoma severity measures). Exploratory factor analysis tended to confirm a three-domain structure. Test–retest intraclass correlation coefficients were higher than 0.927 for domain-specific and total GVFQ-40 scores.ConclusionsThe GVFQ-40 possesses good validity and reliability. It can be used to evaluate the impact of glaucomatous damage on visual ability and has potential in the evaluation of intervention efficacy.Trial registration numberNCT04722861.</abstract><cop>BMA House, Tavistock Square, London, WC1H 9JR</cop><pub>BMJ Publishing Group Ltd</pub><pmid>35379597</pmid><doi>10.1136/bjophthalmol-2021-320985</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0003-3247-7199</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Blindness Clinical Science Cross-Sectional Studies Diabetes Diabetic retinopathy Eye diseases Focus groups Glaucoma Glaucoma - diagnosis Humans Laboratories Ophthalmology Patients Quality of Life Questionnaires Rehabilitation Reproducibility of Results Sickness Impact Profile Strabismus Surveys and Questionnaires Validity Vision Vision Disorders - diagnosis Visual impairment |
| title | Development and validation of the 40-item Glaucoma Visual Functioning Questionnaire |
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