Five-year changes in anterior segment parameters in an older population in urban southern China: the Liwan Eye Study
PurposeTo investigate the 5-year changes in static and dynamic anterior segment optical coherence tomography (AS-OCT) parameters and their predictors.MethodsThis was a prospective, population-based cohort study of people aged 50 years and older residing in the Liwan District, Guangzhou, China. Stand...
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| Published in | British journal of ophthalmology Vol. 104; no. 4; pp. 582 - 587 |
|---|---|
| Main Authors | , , , , , , , , |
| Format | Journal Article |
| Language | English |
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England
BMJ Publishing Group LTD
01.04.2020
BMJ Publishing Group |
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| Online Access | Get full text |
| ISSN | 0007-1161 1468-2079 1468-2079 |
| DOI | 10.1136/bjophthalmol-2019-313827 |
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| Abstract | PurposeTo investigate the 5-year changes in static and dynamic anterior segment optical coherence tomography (AS-OCT) parameters and their predictors.MethodsThis was a prospective, population-based cohort study of people aged 50 years and older residing in the Liwan District, Guangzhou, China. Standardised AS-OCT scans were performed in November 2008 and November 2013 under dark and light conditions. Customised software was used to analyse horizontal AS-OCT images. Parameters in dark and measurements of light-to-dark changes were used for analyses.ResultsA total of 186 (71.8%) subjects underwent AS-OCT twice, 5 years apart and were included for analyses. The mean age in 2008 was 64.7±7.0 years, and 60.2% were women. The anterior chamber width (ACW) decreased from 11.74±0.44 mm in 2008 to 11.60±0.37 mm in 2013 (p=0.001). There was a trend towards a decrease in dynamic capacity (light-to-dark changes) in the anterior segment, with decreased iris thickness at 750 µm (ΔIT750), ΔACW, Δ anterior chamber area (ACA) and Δ pupil diameter at 5 years (all p<0.05). After adjusting for age and sex, the following baseline parameters were associated with a greater decrease rate in trabecular iris space area at 500 µm (TISA500) at 5 years: TISA500, IT750 and ACA in dark (p<0.001 for all).ConclusionsAnterior chamber angle width decreased and the amount of light-to-dark changes declined during 5-year follow-up. Subjects with greater height, wider angle width and thicker iris at baseline have greater angle narrowing at follow-up. |
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| AbstractList | To investigate the 5-year changes in static and dynamic anterior segment optical coherence tomography (AS-OCT) parameters and their predictors.
This was a prospective, population-based cohort study of people aged 50 years and older residing in the Liwan District, Guangzhou, China. Standardised AS-OCT scans were performed in November 2008 and November 2013 under dark and light conditions. Customised software was used to analyse horizontal AS-OCT images. Parameters in dark and measurements of light-to-dark changes were used for analyses.
A total of 186 (71.8%) subjects underwent AS-OCT twice, 5 years apart and were included for analyses. The mean age in 2008 was 64.7±7.0 years, and 60.2% were women. The anterior chamber width (ACW) decreased from 11.74±0.44 mm in 2008 to 11.60±0.37 mm in 2013 (p=0.001). There was a trend towards a decrease in dynamic capacity (light-to-dark changes) in the anterior segment, with decreased iris thickness at 750 µm (ΔIT750), ΔACW, Δ anterior chamber area (ACA) and Δ pupil diameter at 5 years (all p<0.05). After adjusting for age and sex, the following baseline parameters were associated with a greater decrease rate in trabecular iris space area at 500 µm (TISA500) at 5 years: TISA500, IT750 and ACA in dark (p<0.001 for all).
Anterior chamber angle width decreased and the amount of light-to-dark changes declined during 5-year follow-up. Subjects with greater height, wider angle width and thicker iris at baseline have greater angle narrowing at follow-up. PurposeTo investigate the 5-year changes in static and dynamic anterior segment optical coherence tomography (AS-OCT) parameters and their predictors.MethodsThis was a prospective, population-based cohort study of people aged 50 years and older residing in the Liwan District, Guangzhou, China. Standardised AS-OCT scans were performed in November 2008 and November 2013 under dark and light conditions. Customised software was used to analyse horizontal AS-OCT images. Parameters in dark and measurements of light-to-dark changes were used for analyses.ResultsA total of 186 (71.8%) subjects underwent AS-OCT twice, 5 years apart and were included for analyses. The mean age in 2008 was 64.7±7.0 years, and 60.2% were women. The anterior chamber width (ACW) decreased from 11.74±0.44 mm in 2008 to 11.60±0.37 mm in 2013 (p=0.001). There was a trend towards a decrease in dynamic capacity (light-to-dark changes) in the anterior segment, with decreased iris thickness at 750 µm (ΔIT750), ΔACW, Δ anterior chamber area (ACA) and Δ pupil diameter at 5 years (all p<0.05). After adjusting for age and sex, the following baseline parameters were associated with a greater decrease rate in trabecular iris space area at 500 µm (TISA500) at 5 years: TISA500, IT750 and ACA in dark (p<0.001 for all).ConclusionsAnterior chamber angle width decreased and the amount of light-to-dark changes declined during 5-year follow-up. Subjects with greater height, wider angle width and thicker iris at baseline have greater angle narrowing at follow-up. To investigate the 5-year changes in static and dynamic anterior segment optical coherence tomography (AS-OCT) parameters and their predictors.PURPOSETo investigate the 5-year changes in static and dynamic anterior segment optical coherence tomography (AS-OCT) parameters and their predictors.This was a prospective, population-based cohort study of people aged 50 years and older residing in the Liwan District, Guangzhou, China. Standardised AS-OCT scans were performed in November 2008 and November 2013 under dark and light conditions. Customised software was used to analyse horizontal AS-OCT images. Parameters in dark and measurements of light-to-dark changes were used for analyses.METHODSThis was a prospective, population-based cohort study of people aged 50 years and older residing in the Liwan District, Guangzhou, China. Standardised AS-OCT scans were performed in November 2008 and November 2013 under dark and light conditions. Customised software was used to analyse horizontal AS-OCT images. Parameters in dark and measurements of light-to-dark changes were used for analyses.A total of 186 (71.8%) subjects underwent AS-OCT twice, 5 years apart and were included for analyses. The mean age in 2008 was 64.7±7.0 years, and 60.2% were women. The anterior chamber width (ACW) decreased from 11.74±0.44 mm in 2008 to 11.60±0.37 mm in 2013 (p=0.001). There was a trend towards a decrease in dynamic capacity (light-to-dark changes) in the anterior segment, with decreased iris thickness at 750 µm (ΔIT750), ΔACW, Δ anterior chamber area (ACA) and Δ pupil diameter at 5 years (all p<0.05). After adjusting for age and sex, the following baseline parameters were associated with a greater decrease rate in trabecular iris space area at 500 µm (TISA500) at 5 years: TISA500, IT750 and ACA in dark (p<0.001 for all).RESULTSA total of 186 (71.8%) subjects underwent AS-OCT twice, 5 years apart and were included for analyses. The mean age in 2008 was 64.7±7.0 years, and 60.2% were women. The anterior chamber width (ACW) decreased from 11.74±0.44 mm in 2008 to 11.60±0.37 mm in 2013 (p=0.001). There was a trend towards a decrease in dynamic capacity (light-to-dark changes) in the anterior segment, with decreased iris thickness at 750 µm (ΔIT750), ΔACW, Δ anterior chamber area (ACA) and Δ pupil diameter at 5 years (all p<0.05). After adjusting for age and sex, the following baseline parameters were associated with a greater decrease rate in trabecular iris space area at 500 µm (TISA500) at 5 years: TISA500, IT750 and ACA in dark (p<0.001 for all).Anterior chamber angle width decreased and the amount of light-to-dark changes declined during 5-year follow-up. Subjects with greater height, wider angle width and thicker iris at baseline have greater angle narrowing at follow-up.CONCLUSIONSAnterior chamber angle width decreased and the amount of light-to-dark changes declined during 5-year follow-up. Subjects with greater height, wider angle width and thicker iris at baseline have greater angle narrowing at follow-up. |
| Author | Wang, Wei Huang, Wenyong Wang, Lanhua He, Mingguang Chen, Feng Wang, Decai Scheetz, Jane Huang, Shengsong Jiang, Yu |
| AuthorAffiliation | 1 State Key Laboratory of Ophthalmology , Zhongshan Ophthalmic Center, Sun Yat-senUniversity , Guangzhou , China 2 Department of Preventive Ophthalmology , ZhongshanOphthalmic Center, Sun Yat-sen University , Guangzhou , China 3 Department of Ophthalmology and Surgery , Royal Victorian Eye and Ear Hospital , Melbourne , Victoria , Australia |
| AuthorAffiliation_xml | – name: 3 Department of Ophthalmology and Surgery , Royal Victorian Eye and Ear Hospital , Melbourne , Victoria , Australia – name: 2 Department of Preventive Ophthalmology , ZhongshanOphthalmic Center, Sun Yat-sen University , Guangzhou , China – name: 1 State Key Laboratory of Ophthalmology , Zhongshan Ophthalmic Center, Sun Yat-senUniversity , Guangzhou , China |
| Author_xml | – sequence: 1 givenname: Yu orcidid: 0000-0002-3513-0505 surname: Jiang fullname: Jiang, Yu email: mingguanghe@gmail.com organization: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-senUniversity, Guangzhou, China – sequence: 2 givenname: Decai surname: Wang fullname: Wang, Decai email: mingguanghe@gmail.com organization: Department of Preventive Ophthalmology, ZhongshanOphthalmic Center, Sun Yat-sen University, Guangzhou, China – sequence: 3 givenname: Wei orcidid: 0000-0002-5273-3332 surname: Wang fullname: Wang, Wei email: mingguanghe@gmail.com organization: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-senUniversity, Guangzhou, China – sequence: 4 givenname: Feng surname: Chen fullname: Chen, Feng email: mingguanghe@gmail.com organization: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-senUniversity, Guangzhou, China – sequence: 5 givenname: Lanhua surname: Wang fullname: Wang, Lanhua email: mingguanghe@gmail.com organization: State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-senUniversity, Guangzhou, China – sequence: 6 givenname: Jane orcidid: 0000-0003-0523-1927 surname: Scheetz fullname: Scheetz, Jane email: mingguanghe@gmail.com organization: Department of Ophthalmology and Surgery, Royal Victorian Eye and Ear Hospital, Melbourne, Victoria, Australia – sequence: 7 givenname: Wenyong surname: Huang fullname: Huang, Wenyong email: mingguanghe@gmail.com organization: Department of Preventive Ophthalmology, ZhongshanOphthalmic Center, Sun Yat-sen University, Guangzhou, China – sequence: 8 givenname: Shengsong surname: Huang fullname: Huang, Shengsong email: mingguanghe@gmail.com organization: Department of Preventive Ophthalmology, ZhongshanOphthalmic Center, Sun Yat-sen University, Guangzhou, China – sequence: 9 givenname: Mingguang orcidid: 0000-0002-6912-2810 surname: He fullname: He, Mingguang email: mingguanghe@gmail.com organization: Department of Ophthalmology and Surgery, Royal Victorian Eye and Ear Hospital, Melbourne, Victoria, Australia |
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| CitedBy_id | crossref_primary_10_1016_j_ogla_2023_08_005 crossref_primary_10_1016_j_heliyon_2023_e14174 crossref_primary_10_1080_09286586_2024_2390425 crossref_primary_10_1167_tvst_9_9_14 crossref_primary_10_3389_fmed_2021_772578 crossref_primary_10_1016_j_ophtha_2021_10_003 crossref_primary_10_1136_bjo_2022_322981 |
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| Keywords | anterior segment optic coherence tomography angle closure dynamics population-based study |
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key-10.1136/bjophthalmol-2019-313827-6 article-title: Determinants of anterior chamber depth: the Singapore Chinese eye study publication-title: Ophthalmology doi: 10.1016/j.ophtha.2012.01.011 – volume: 18 start-page: 173 year: 2009 ident: key-10.1136/bjophthalmol-2019-313827-25 article-title: Iris cross-sectional area decreases with pupil dilation and its dynamic behavior is a risk factor in angle closure publication-title: J Glaucoma doi: 10.1097/IJG.0b013e31818624ce – volume: 117 start-page: 1 year: 2010 ident: key-10.1136/bjophthalmol-2019-313827-10 article-title: The iris is a sponge: a cause of angle closure publication-title: Ophthalmology doi: 10.1016/j.ophtha.2009.11.002 – volume: 119 start-page: 2500 year: 2012 ident: key-10.1136/bjophthalmol-2019-313827-24 article-title: Determinants and two-year change in anterior chamber angle width in a Chinese population publication-title: Ophthalmology doi: 10.1016/j.ophtha.2012.06.051 – volume: 52 start-page: 9404 year: 2011 ident: key-10.1136/bjophthalmol-2019-313827-20 article-title: Differences in baseline dark and the dark-to-light changes in anterior chamber angle parameters in whites and ethnic Chinese publication-title: Invest Ophthalmol Vis Sci doi: 10.1167/iovs.11-8470 – volume: 53 start-page: 3139 year: 2012 ident: key-10.1136/bjophthalmol-2019-313827-18 article-title: Ethnic difference of the anterior chamber area and volume and its association with angle width publication-title: Invest Ophthalmol Vis Sci doi: 10.1167/iovs.12-9776 – volume: 53 start-page: 2607 year: 2012 ident: key-10.1136/bjophthalmol-2019-313827-22 article-title: Factors associated with anterior chamber narrowing with age: an optical coherence tomography study publication-title: Invest Ophthalmol Vis Sci doi: 10.1167/iovs.11-9359 – volume: 88 start-page: e205 year: 2010 ident: key-10.1136/bjophthalmol-2019-313827-23 article-title: Effect of age on anterior chamber angle configuration in Asians determined by anterior segment optical coherence tomography; clinic-based study publication-title: Acta Ophthalmol doi: 10.1111/j.1755-3768.2010.01960.x – volume: 55 start-page: 1672 year: 2014 ident: key-10.1136/bjophthalmol-2019-313827-28 article-title: Comparison of dynamic changes in anterior ocular structures examined with anterior segment optical coherence tomography in a cohort of various origins publication-title: Invest Ophthalmol Vis Sci doi: 10.1167/iovs.13-13641 |
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| Snippet | PurposeTo investigate the 5-year changes in static and dynamic anterior segment optical coherence tomography (AS-OCT) parameters and their... To investigate the 5-year changes in static and dynamic anterior segment optical coherence tomography (AS-OCT) parameters and their predictors. This was a... To investigate the 5-year changes in static and dynamic anterior segment optical coherence tomography (AS-OCT) parameters and their predictors.PURPOSETo... |
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| SubjectTerms | Biometrics Blood pressure Clinical Science Endothelium Eyes & eyesight Light Older people Physiology Population-based studies Statistical analysis Variables |
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| Title | Five-year changes in anterior segment parameters in an older population in urban southern China: the Liwan Eye Study |
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