22 results on '"Robman, Liubov D."'
Search Results
2. Effect of Low-Dose Aspirin on the Course of Age-Related Macular Degeneration: A Secondary Analysis of the ASPREE Randomized Clinical Trial.
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Robman, Liubov D., Wolfe, Rory, Woods, Robyn L., Thao, Le Thi Phuong, Makeyeva, Galina A., Hodgson, Lauren A. B., Lepham, Y-Anh, Jachno, Kim, Phung, James, Maguire, Emily, Luong, Henry, Trevaks, Ruth E., Ward, Stephanie A., Fitzgerald, Sharyn M., Orchard, Suzanne G., Lacaze, Paul, Storey, Elsdon, Abhayaratna, Walter P., Nelson, Mark R., and Guymer, Robyn H.
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- 2024
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3. Self‐rated eyesight among healthy older Australians: Baseline results of the ASPREE Longitudinal Study of Older Persons.
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McGuinness, Myra B., Robman, Liubov D., McNeil, John J., Tran, Cammie, Woods, Robyn L., Owen, Alice J., Pham, Thao, and Guymer, Robyn H.
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OLDER people , *AUSTRALIANS , *VISION , *MACULAR degeneration , *VISION disorders - Abstract
Background: We aimed to describe the self‐reported level of eyesight amongst a cohort of relatively healthy older Australian adults, and to investigate associations between poorer self‐rated eyesight and demographic, health, and functional characteristics Methods: The ASPirin in Reducing Events in the Elderly (ASPREE) Longitudinal Study of Older Persons (ALSOP) study was embedded in a multisite trial which recruited independently living Australians from general practices (2010–2014). Self‐rated eyesight was recorded on a paper‐based questionnaire as Excellent, Good, Fair, Poor, Very poor, or Completely blind at the baseline study wave Results: Data from 14 592 participants (aged 70–95 years, 54.61% female) were included in this cross‐sectional analysis. Eighty percent of participants reported excellent or good eyesight (n = 11 677). People with complete blindness were precluded from enrolling but 299 participants (2.0%) reported poor or very poor eyesight, and 2616 rated their eyesight as fair (17.9%). Lower levels of eyesight were associated with being older, female, fewer years of formal education, a primary language other than English, smoking, and self‐reported macular degeneration, glaucoma, retinopathy, cataracts, and hearing problems (each p ≤ 0.021). People with lower levels of eyesight had a higher number of falls, frailty characteristics, and depressive symptoms, and lower mental and physical health functioning scores (each p < 0.001) Conclusions: Whilst most of these healthy older Australians reported good or excellent eyesight, a notable minority reported poor or very poor eyesight, and this was associated with a range of poorer health measures. These findings support the need for additional resources to prevent vision loss and associated sequelae [ABSTRACT FROM AUTHOR]
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- 2023
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4. Plasma levels of amyloid beta and other proinflammatory mediators in patients with age-related macular degeneration
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Guymer, Robyn, Cipriani, Tania, Rittenhouse, Kay D., Lim, Lyndell, Robman, Liubov D., Li, Wenlin, Wang, Wenlian, Deng, Shibing, and Banerjee, Poulabi
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- 2015
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5. Younger Siblings, C-Reactive Protein, and Risk of Age-Related Macular Degeneration
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Cohn, Amy C., Busija, Lucy, Robman, Liubov D., Dimitrov, Peter N., Varsamidis, Mary, Lim, Lyndell L., Baird, Paul N., and Guymer, Robyn H.
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- 2013
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6. Can genetic associations change with age? CFH and age-related macular degeneration
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Adams, Madeleine K.M., Simpson, Julie A., Richardson, Andrea J., Guymer, Robyn H., Williamson, Elizabeth, Cantsilieris, Stuart, English, Dallas R., Aung, Khin Zaw, Makeyeva, Galina A., Giles, Graham G., Hopper, John, Robman, Liubov D., and Baird, Paul N.
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- 2012
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7. 20/20—Alcohol and Age-related Macular Degeneration: The Melbourne Collaborative Cohort Study
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Adams, Madeleine K. M., Chong, Elaine W., Williamson, Elizabeth, Aung, Khin Zaw, Makeyeva, Galina A., Giles, Graham G., English, Dallas R., Hopper, John, Guymer, Robyn H., Baird, Paul N., Robman, Liubov D., and Simpson, Julie A.
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- 2012
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8. Apolipoprotein E Gene Associations in Age-related Macular Degeneration: The Melbourne Collaborative Cohort Study
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Adams, Madeleine K. M., Simpson, Julie A., Richardson, Andrea J., English, Dallas R., Aung, Khin Zaw, Makeyeva, Galina A., Guymer, Robyn H., Giles, Graham G., Hopper, John, Robman, Liubov D., and Baird, Paul N.
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- 2012
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9. Abdominal Obesity and Age-related Macular Degeneration
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Adams, Madeleine K. M., Simpson, Julie A., Aung, Khin Zaw, Makeyeva, Galina A., Giles, Graham G., English, Dallas R., Hopper, John, Guymer, Robyn H., Baird, Paul N., and Robman, Liubov D.
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- 2011
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10. Age Related Macular Degeneration and Total Hip Replacement Due to Osteoarthritis or Fracture: Melbourne Collaborative Cohort Study.
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Chong, Elaine W., Wang, Yuanyuan, Robman, Liubov D., Aung, Khin Zaw, Makeyeva, Galina A., Giles, Graham G., Graves, Stephen, Cicuttini, Flavia M., and Guymer, Robyn H.
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RETINAL degeneration ,TOTAL hip replacement ,OSTEOARTHRITIS diagnosis ,FEMUR neck ,OSTEOARTHRITIS treatment - Abstract
Osteoarthritis is the leading cause of total hip replacement, accounting for more than 80% of all total hip replacements. Emerging evidence suggests that osteoarthritis has a chronic inflammatory component to its pathogenesis similar to age-related macular degeneration. We evaluated the association between age-related macular degeneration and total hip replacement as proxy for severe osteoarthritis or fractured neck of femur in the Melbourne Collaborative Cohort Study. 20,744 participants had complete data on both age-related macular degeneration assessed from colour fundus photographs taken during 2003–2007 and total hip replacement. Total hip replacements due to hip osteoarthritis and fractured neck of femur during 2001–2011 were identified by linking the cohort records to the Australian Orthopedic Association National Joint Replacement Registry. Logistic regression was used to examine the association between age-related macular degeneration and risk of total hip replacement due to osteoarthritis and fracture separately, adjusted for confounders. There were 791 cases of total hip replacement for osteoarthritis and 102 cases of total hip replacement due to fractured neck of femur. After adjustment for age, sex, body mass index, smoking, and grouped country of birth, intermediate age-related macular degeneration was directly associated with total hip replacement for osteoarthritis (odds ratio 1.22, 95% CI 1.00–1.49). Late age-related macular degeneration was directly associated with total hip replacement due to fractured neck of femur (odds ratio 5.21, 95% CI2.25–12.02). The association between intermediate age-related macular degeneration and an increased 10-year incidence of total hip replacement due to osteoarthritis suggests the possibility of similar inflammatory processes underlying both chronic diseases. The association of late age-related macular degeneration with an increased 10-year incidence of total hip replacement due to fractured neck of femur may be due to an increased prevalence of fractures in those with poor central vision associated with the late complications of age-related macular degeneration. [ABSTRACT FROM AUTHOR]
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- 2015
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11. AGE-RELATED MACULAR DEGENERATION PHENOTYPES ASSOCIATED WITH MUTUALLY EXCLUSIVE HOMOZYGOUS RISK VARIANTS IN CFH AND HTRA1 GENES.
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CHONG, ELAINE W., AMIRUL ISLAM, FAKIR M., ROBMAN, LIUBOV D., AUNG, KHIN ZAW, RICHARDSON, ANDREA J., BAIRD, PAUL N., and GUYMER, ROBYN H.
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- 2015
12. Age-Related Macular Degeneration in Ethnically Diverse Australia: Melbourne Collaborative Cohort Study.
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Robman, Liubov D., Islam, Fakir M. A., Chong, Elaine W. T., Adams, Madeleine K. M., Simpson, Julie A., Aung, Khin Zaw, Makeyeva, Galina A., Hopper, John L., English, Dallas R., Giles, Graham G., Baird, Paul N., and Guymer, Robyn H.
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ETHNIC groups , *DISEASES , *RETINAL degeneration , *AGE factors in disease ,AGE factors in retinal degeneration - Abstract
Purpose: To determine and compare the prevalence of age-related macular degeneration (AMD) in older Australians of Anglo-Celtic and Southern European origin. Methods: A total of 21,132 participants of the Melbourne Collaborative Cohort Study, aged 47-86 years, were assessed for AMD in 2003-2007 with non-mydriatic fundus photography. Of these, 14% were born in Southern Europe (Greece, Italy or Malta), with the remaining 86% of Anglo-Celtic origin, born in Australia, the United Kingdom or New Zealand. Results: Overall, 2694 participants (12.7%) had early stages of AMD, defined as either one or more drusen ≥125 μm (with or without pigmentary abnormalities) or one or more drusen 63-124 μm with pigmentary abnormalities in a 6000-μm diameter grading grid, in the absence of late AMD in either eye. A total of 122 participants (0.6%) had late AMD, defined as either geographic atrophy or neovascular AMD. In logistic regression analysis, adjusted for age, sex, smoking, education and physical activity, Southern Europeans compared to Anglo-Celts had a higher prevalence of the early stages of AMD (odds ratio, OR, 1.15, 95% confidence interval, CI, 1.00-1.34), and lower prevalence of late AMD (OR 0.36, 95% CI 0.17-0.78). Conclusions: Australians of Southern European origin have a higher prevalence of the early stages of AMD and lower prevalence of late AMD compared to those of Anglo-Celtic origin. Although AMD prevalence in the older age group(s) of Southern Europeans could be underestimated due to disparity in participation rates, it is likely that both lifestyle and genetic factors play their parts in differential AMD prevalence in these ethnic groups. [ABSTRACT FROM AUTHOR]
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- 2015
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13. Proof of Concept, Randomized, Placebo-Controlled Study of the Effect of Simvastatin on the Course of Age-Related Macular Degeneration.
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Guymer, Robyn H., Baird, Paul N., Varsamidis, Mary, Busija, Lucy, Dimitrov, Peter N., Aung, Khin Zaw, Makeyeva, Galina A., Richardson, Andrea J., Lim, Lyndell, and Robman, Liubov D.
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SIMVASTATIN ,RETINAL degeneration ,HEALTH outcome assessment ,APOLIPOPROTEIN E ,OPHTHALMOLOGY ,POPULATION genetics - Abstract
Background: HMG Co-A reductase inhibitors are ubiquitous in our community yet their potential role in age-related macular degeneration (AMD) remains to be determined. Methodology/Principal Findings: Objectives: To evaluate the effect of simvastatin on AMD progression and the effect modification by polymorphism in apolipoprotein E (ApoE) and complement factor H (CFH) genes. Design: A proof of concept double-masked randomized controlled study. Participants: 114 participants aged 53 to 91 years, with either bilateral intermediate AMD or unilateral non-advanced AMD (with advanced AMD in fellow eye), BCVA≥20/60 in at least one eye, and a normal lipid profile. Intervention: Simvastatin 40 mg/day or placebo, allocated 1∶1. Main outcome measures: Progression of AMD either to advanced AMD or in severity of non-advanced AMD. Results. The cumulative AMD progression rates were 70% in the placebo and 54% in the simvastatin group. Intent to treat multivariable logistic regression analysis, adjusted for age, sex, smoking and baseline AMD severity, showed a significant 2-fold decrease in the risk of progression in the simvastatin group: OR 0.43 (0.18–0.99), p = 0.047. Post-hoc analysis stratified by baseline AMD severity showed no benefit from treatment in those who had advanced AMD in the fellow eye before enrolment: OR 0.97 (0.27–3.52), p = 0.96, after adjusting for age, sex and smoking. However, there was a significant reduction in the risk of progression in the bilateral intermediate AMD group compared to placebo [adjusted OR 0.23 (0.07–0.75), p = 0.015]. The most prominent effect was observed amongst those who had the CC (Y402H) at risk genotype of the CFH gene [OR 0.08 (0.02–0.45), p = 0.004]. No evidence of harm from simvastatin intervention was detected. Conclusion/Significance: Simvastatin may slow progression of non-advanced AMD, especially for those with the at risk CFH genotype CC (Y402H). Further exploration of the potential use of statins for AMD, with emphasis on genetic subgroups, is warranted. Trial Registration: Australian New Zealand Clinical Trial Registry (ANZCTR) ACTRN1260500032065 [ABSTRACT FROM AUTHOR]
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- 2013
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14. THE PREVALENCE AND RISK FACTORS OF EPIRETINAL MEMBRANES.
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Aung, Khin Z., Makeyeva, Galina, Adams, Madeleine K., Chong, Elaine W.-T., Busija, Lucy, Giles, Graham G., English, Dallas R., Hopper, John, Baird, Paul N., Guymer, Robyn H., and Robman, Liubov D.
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- 2013
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15. Dietary Patterns and Their Associations with Age-Related Macular Degeneration.
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Amirul Islam, Fakir M., Chong, Elaine W., Hodge, Allison M., Guymer, Robyn H., Aung, Khin Zavo, Makeyeva, Galina A., Baird, Paul N., Hopper, John L., English, Dallas R., Giles, Graham G., and Robman, Liubov D.
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RETINAL degeneration , *AGE factors in disease , *DISEASE prevalence , *VEGETABLES , *FOLLOW-up studies (Medicine) , *HEALTH outcome assessment - Abstract
Objective: To evaluate the association between dietary patterns and age-related macular degeneration (AMD). Design: Food frequency data were collected from Melbourne Collaborative Cohort Study (MCCS) participants at the baseline study in 1990-1994. During follow-up in 2003-2007, retinal photographs were taken and evaluated for AMD. Participants: At baseline, 41 514 participants aged 40 to 70 years and born in Australia or New Zealand (69%), or who had migrated from the United Kingdom, Italy, Greece, or Malta (31%) were recruited. Of these, 21 132 were assessed for AMD prevalence at follow-up. Methods: Principal component analysis was used to identify dietary patterns (Factors F1 -6) among the food items. Logistic regression was used to assess associations of dietary patterns with AMD. Main Outcome Measures: Odds ratios (ORs) for early stages and advanced AMD in association with dietary patterns. Results: A total of 2508 participants (12.8%) had early stages of AMD, and 108 participants (0.6%) had advanced AMD. Six factors characterized by predominant intakes of fruits (F1); vegetables (F2); grains, fish, steamed or boiled chicken, vegetables, and nuts (F3); red meat (F4); processed foods comprising cakes, sweet biscuits, and desserts (F5); and salad (F6) were identified. Higher F3 scores were associated with a lower prevalence of advanced AMD (fourth vs. first quartile) (OR, 0.49; 95% confidence interval [CI], 0.28-0.87), whereas F4 scores greater than the median were associated with a higher prevalence of advanced AMD (OR, 1.46; 95% CI, 1.0-2.17). Conclusions: Rather than specific individual food items, these factors represent a broader picture of food consumption. A dietary pattern high in fruits, vegetables, chicken, and nuts and a pattern low in red meat seems to be associated with a lower prevalence of advanced AMD. No particular food pattern seemed to be associated with the prevalence of the earliest stages of AMD. [ABSTRACT FROM AUTHOR]
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- 2014
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16. Obstructive Sleep Apnea and Cerebral Small Vessel disease in Community-based Older People: An ASPREE Imaging Substudy.
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Ward SA, Storey E, Naughton MT, Wolfe R, Hamilton GS, Law M, Kawasaki R, Abhayaratna WP, Webb KL, O'Donoghue FJ, Gasevic D, Stocks NP, Trevaks RE, Robman LD, Kolbe S, Fitzgerald SM, Orchard SG, Wong T, McNeil J, Reid CM, Sinclair B, and Woods RL
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Study Objectives: Obstructive sleep apnea (OSA) may increase risk of dementia. A potential pathway for this risk is through cerebral small vessel disease (CSVD). In the context of an existing randomized trial of aspirin for primary prevention, we aimed to investigate OSA's impact on CSVD imaging measures and explore whether aspirin effects these measures over 3 years that differ in the presence or absence of OSA., Methods: A sub-study of the ASPirin in Reducing Events in the Elderly randomized placebo-controlled trial of low-dose aspirin. Community-dwelling participants aged 70 years and above, without cognitive impairment, cardiovascular disease or known OSA completed an unattended limited-channel sleep study that calculated the oxygen desaturation index and apnea-hypopnea index. At baseline and 3 years later, volumes of white matter hyperintensities (WMH) and silent brain infarctions (SBI) were measured on 1.5 Tesla brain magnetic resonance imaging, and retinal vessel calibers were calculated from retinal vascular imaging., Results: Mild and moderate/severe OSA was detected in 48.9% and 29.9%, respectively, of the 311 participants, who had a mean age of 73.7 years (SD 3.4 years), 38.6% female. OSA of any severity did not associate with WMH volumes, SBI, nor with retinal vessel calibers at baseline, nor with change in these measures in the 277 participants with repeated measures acquired after 3 years. OSA of any severity did not interact with aspirin on change in these measures over 3 years., Conclusion: In healthy older adults undiagnosed OSA was not associated with retinal vascular calibers and neuroimaging measures of CSVD., (© The Author(s) 2024. Published by Oxford University Press on behalf of Sleep Research Society.)
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- 2024
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17. Age-related macular degeneration phenotypes associated with mutually exclusive homozygous risk variants in CFH and HTRA1 genes.
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Chong EW, Amirul Islam FM, Robman LD, Aung KZ, Richardson AJ, Baird PN, and Guymer RH
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- Aged, Case-Control Studies, Complement Factor H genetics, Female, Genotype, Genotyping Techniques, High-Temperature Requirement A Serine Peptidase 1, Homozygote, Humans, Male, Middle Aged, Phenotype, Risk Factors, Macular Degeneration genetics, Polymorphism, Single Nucleotide, Retinal Drusen genetics, Serine Endopeptidases genetics
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Purpose: To determine age-related macular degeneration (AMD) phenotypes associated with mutually exclusive homozygotic risk variants in rs1061170 (CFH) and rs11200638 (HTRA1)., Methods: Nested case-control study of 2,982 eyes (2,129 control, 809 drusen ≥125 μm, 44 advanced AMD) homozygous for CFH [TT or CC] and HTRA1 [GG or AA] were analyzed using logistic regression and generalized estimating equations specifically regards to homozygous risk variants in one but homozygous no-risk in the other gene., Results: In early AMD, [CFH HTRA1] and [CFH HTRA1] were associated with central drusen (odds ratio [95% confidence interval] = 4.13 [2.97-5.73] and 3.65 [1.88-7.09], respectively). However, only [CFH HTRA1] was associated with central drusen occupying ≥50% area (13.9 [2.97-64.7]). In advanced AMD, [CFH HTRA1] was associated with geographic atrophy (4.04 [1.57-10.4]), whereas [CFH HTRA1] was associated with neovascular AMD (36.5 [8.3-160.9]). In doubly homozygous risk groups [CFH HTRA1], odds ratios were multiplicative., Conclusion: Central but not peripheral drusen location was strongly associated with both [CFH HTRA1] and [CFH HTRA1]. Only [CFH HTRA1] was significantly associated with increased central drusen area.
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- 2015
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18. Does aspirin increase the risk of age-related macular degeneration?
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Chong EW, Guymer RH, and Robman LD
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- Humans, Aspirin adverse effects, Macular Degeneration chemically induced, Macular Degeneration etiology
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This commentary on the review by Christen and Chew discusses the controversy surrounding aspirin use and its association with age-related macular degeneration (AMD). We address the strength of evidence between low-dose aspirin use and AMD and also discuss the risks and benefits of aspirin use in primary versus secondary prevention of cardiovascular diseases in these cases. We also highlight an ongoing randomized controlled trial in this area.
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- 2014
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19. The prevalence and risk factors of epiretinal membranes: the Melbourne Collaborative Cohort Study.
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Aung KZ, Makeyeva G, Adams MK, Chong EW, Busija L, Giles GG, English DR, Hopper J, Baird PN, Guymer RH, and Robman LD
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- Aged, Aged, 80 and over, Epiretinal Membrane ethnology, Epiretinal Membrane etiology, Female, Humans, Logistic Models, Male, Middle Aged, Prevalence, Prospective Studies, Risk Factors, Victoria epidemiology, White People statistics & numerical data, Epiretinal Membrane epidemiology
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Purpose: To determine the prevalence of epiretinal membranes (ERMs) in Melbourne, Australia and its risk factors in this population., Methods: The Melbourne Collaborative Cohort Study is a prospective study investigating the role of diet and life style in the causation of common chronic diseases. Eighty-six percent of participants were of Northern European origin born in Australia or United Kingdom and 14% were migrants from Greece or Italy (Southern European origin). Nonmydriatic digital retinal photography was implemented at Melbourne Collaborative Cohort Study follow-up. The ERMs were recorded as cellophane macular reflex without retinal folds or preretinal macular fibrosis (PMF) with retinal folds., Results: A total of 22,406 participants had retinal photography, 95% (n = 21,241) were eligible for ERM grading. The ERM prevalence were 8.9% (1,882); cellophane macular reflex, 4.9% (1,047); and preretinal macular fibrosis, 3.9% (835). After adjustment for age, sex, level of education, smoking status, level of cholesterol, body mass index, waist-to-hip ratio, waist measurement, blood pressure, diabetes, and stroke, increasing age and Southern European ethnicity was significantly associated with ERMs. Overall, in Southern Europeans, ERMs odd ratio was 1.97 (95% confidence intervals, 1.67-2.31), P < 0.001; preretinal macular fibrosis was 1.82 (95% confidence intervals, 1.43-2.31), P < 0.001; and cellophane macular reflex was 1.93 (1.57-2.38), P < 0.001., Conclusion: In an older Australian population, the prevalence of ERMs was 8.9% and was almost two times higher in participants of Southern European origin than Northern European origin.
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- 2013
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20. Relationship between clinical macular changes and retinal function in age-related macular degeneration.
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Dimitrov PN, Robman LD, Varsamidis M, Aung KZ, Makeyeva G, Busija L, Vingrys AJ, and Guymer RH
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- Aged, Female, Fundus Oculi, Humans, Macula Lutea pathology, Macular Degeneration pathology, Optic Disk Drusen pathology, Optic Disk Drusen physiopathology, Photoreceptor Cells, Vertebrate physiology, Pigment Epithelium of Eye pathology, Pigment Epithelium of Eye physiopathology, Prognosis, Visual Acuity physiology, Macula Lutea physiopathology, Macular Degeneration physiopathology
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Purpose: The aim of this study was to investigate the relationship between clinical macular changes and retinal function in age-related macular degeneration (AMD)., Methods: We recruited 357 participants with visual acuity of better than 20/60 in the study eye, including 64 individuals with normal fundi and 293 AMD participants classified into 12 subgroups based upon the International Classification and Grading System. Visual function in the study eye was assessed using two steady-state tests (achromatic 14 Hz flicker [F14Hz] and isoluminant blue color [BCT]) and two adaptation measurements (cone photo-stress recovery rate [CRR] and rod dark adaptation recovery rate [RRR]). The groups were compared on their average psychophysical measurements and ranked according to functional deficiency., Results: Both adaptation parameters were significantly abnormal when only hard and/or intermediate drusen were evident (compared to controls, P < 0.023) and yielded considerably worse outcomes in cases with more advanced fundus changes (P < 0.001), but provided limited ability to discriminate between these cases (linear trend, CRR t = 0.68, P = 0.50 and RRR t = 1.76, P = 0.08). Steady-state measurements, however, declined gradually along the entire hierarchy of fundus changes (linear trend, F14Hz t = 10.16, P < 0.001 and BCT t = 11.19, P < 0.001) with F14Hz being able to detect significant functional change as early as in the intermediate drusen group, when compared to controls (P = 0.003)., Conclusions: Steady state thresholds (F14Hz and BCT) and clinical signs showed significant concordance across the spectrum of early AMD fundus changes. This suggests that these tests may be an effective tool for monitoring progression of AMD to supplement clinical grading.
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- 2012
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21. Visual function tests as potential biomarkers in age-related macular degeneration.
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Dimitrov PN, Robman LD, Varsamidis M, Aung KZ, Makeyeva GA, Guymer RH, and Vingrys AJ
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- Aged, Diagnosis, Differential, Disease Progression, Female, Fluorescein Angiography, Follow-Up Studies, Fundus Oculi, Humans, Macula Lutea pathology, Macular Degeneration diagnosis, Male, Photic Stimulation, Psychophysics methods, Reproducibility of Results, Color Vision physiology, Dark Adaptation physiology, Macula Lutea physiopathology, Macular Degeneration physiopathology, Vision Tests methods, Visual Acuity physiology
- Abstract
Purpose: To evaluate the potential of psychophysical assessments of retinal function to provide diagnostic biomarkers of early age-related macular degeneration (AMD)., Methods: Unilateral visual function was assessed in 221 participants (72.86 ± 9.94 years; 67% women) with early AMD (visual acuity better than 20/60) and 109 controls (73.07 ± 10.32 years; 65% women). Psychophysical assessment included steady state thresholds (4- and 14-Hz flicker and red and blue color) and dynamic tests (photostress recovery [PSR] and dark adaptation [DA]). All test parameters were compared in terms of their diagnostic capacity (sensitivity and specificity), reproducibility, and clinical applicability (test duration and participant's perception of test difficulty). AMD status was determined by digital photography, according to the International Classification and Grading System., Results: All functional measurements were significantly worse, on average, in the AMD group than in the control group (P < 0.001). Static and dynamic parameters showed weak correlations (range, 0.003-0.225). Rod recovery in DA and cone recovery in PSR had the best diagnostic capacity (area under curve [AUC], receiver operating characteristic [ROC] analysis, 0.93 ± 0.016 and 0.85 ± 0.021, respectively). Considering diagnostic capacity together with test reproducibility and clinical applicability, the 14-Hz flicker gave the best outcome, followed by PSR. Combination of these two tests detected 71% of abnormal early AMD cases., Conclusions: All the visual function tests had good diagnostic capacity. Combination of the 14-Hz flicker thresholds and dynamics of the PSR test provided optimal quantitative assessment of retinal function in early AMD, suggesting that this set is a potentially useful clinical tool for following progression of early AMD and assessing the efficacy of interventions.
- Published
- 2011
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22. Identification of urinary biomarkers for age-related macular degeneration.
- Author
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Guymer RH, Tao LW, Goh JK, Liew D, Ischenko O, Robman LD, Aung K, Cipriani T, Cain M, Richardson AJ, Baird PN, and Langham R
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- Adult, Aged, Aged, 80 and over, Anaphylatoxins, Cross-Sectional Studies, Disease Progression, Female, Humans, Immunoassay, Macular Degeneration epidemiology, Macular Degeneration pathology, Male, Middle Aged, Prevalence, Retrospective Studies, Tomography, Optical Coherence, Victoria epidemiology, Biomarkers urine, Chemokine CCL2 urine, Complement C3a urine, Macular Degeneration urine, Transforming Growth Factor beta1 urine
- Abstract
Purpose: Age-related macular degeneration (AMD) can be considered as a chronic low-grade systemic inflammatory disease. This study was undertaken to test the associations of AMD with the urinary proinflammatory cytokines transforming growth factor (TGF)-β1, macrophage chemoattractant protein (MCP)-1 and C3a-desArg, as potential noninvasive biomarkers for monitoring AMD., Methods: A cross-sectional study of 103 AMD cases, comprising early AMD (n = 51), geographic atrophy (GA; n = 19), or choroidal neovascularization (CNV; 33), and 54 unrelated controls, aged 73 ± 9 years, who attended the Royal Victorian Eye and Ear Hospital and private practice in Victoria, Australia. AMD status was determined from the bilateral retinal digital photographs and through angiography and optical coherence tomography images when confirmation of CNV was needed. Serum and urine cytokine levels were measured by immunoassay and the rs1061170 (Y402H) single-nucleotide polymorphism of the complement factor H (CFH) gene was determined., Results: Multivariate logistic regression analyses demonstrated significant associations of urinary TGF-β1 levels (odds ratio [95% confidence interval]: OR = 1.24 [1.02-1.50]; P < 0.031) and MCP-1 levels (OR = 1.07 [1.02-1.12]; P < 0.008), in early AMD, and also MCP-1 levels with GA (OR = 1.10 [1.03-1.17]; P < 0.003). There was no correlation between urinary and serum cytokine levels. Individuals with one or more copies of the C allele (Y402H) were 2.5 times more likely to have urinary MCP-1 above median levels (P < 0.040)., Conclusions: This study demonstrates a novel finding of an association between elevated urinary cytokines TGF-β1 and MCP-1 and AMD. Further development of a urinary biomarker profile could provide a practical tool for detection of early AMD, progression monitoring, and assessment of treatment efficacy.
- Published
- 2011
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