Publications by authors named "Peggy P Chiang"

Purpose: While diabetes is a chronic disease, in many health care systems patients with diabetes at risk of diabetic retinopathy (DR) are managed in hospital settings. Aim of this feasibility study is to assess the quality of care and economic benefits of a shared care model managing patients at risk of DR in a primary eye care clinic (PEC) compared with a current tertiary specialist outpatient clinic (SOC).

Methods: A randomized trial was performed, to compare a PEC with a SOC in Singapore.

View Article and Find Full Text PDF
Article Synopsis
  • Cancer and other noncommunicable diseases (NCDs) pose a significant threat to global development, with slow progress in addressing these issues highlighted by the recent UN meeting; key barriers include a lack of situational analyses and prioritization for effective action against NCDs.* -
  • The study aims to provide comprehensive data on cancer burden across 29 cancer types in 195 countries from 1990 to 2017, utilizing the Global Burden of Disease (GBD) methods to analyze cancer incidence, mortality, and disability metrics.* -
  • In 2017, there were 24.5 million new cancer cases globally, with significant variations based on socio-demographic factors; the majority of cancer-related disabilities stemmed
View Article and Find Full Text PDF

Objective: To determine the effectiveness of the "Living Successfully with Low Vision" (LSLV) self-management program to improve patient-reported outcomes in Singaporeans.

Methods: In this randomized controlled trial, 165 participants with low vision (LV) were recruited and assigned to usual care (LV aid training only; N = 82) or LSLV program (N = 83). The LSLV program focuses on problem solving, coping mechanism and anticipation/preparation for future needs.

View Article and Find Full Text PDF

Background: To examine the association of diabetes and diabetic retinopathy (DR) with retinal ganglion cell (RGC) loss.

Design: Observational case-control study.

Participants: Type 2 diabetes cases and age-gender matched controls without diabetes.

View Article and Find Full Text PDF

Importance: The association between obesity and diabetic retinopathy (DR) is equivocal, possibly owing to the strong interrelation between generalized and abdominal obesity leading to a mutually confounding effect. To our knowledge, no study in Asia has investigated the independent associations of these 2 parameters with DR to date.

Objective: To investigate the associations of generalized (defined by body mass index [BMI], calculated as weight in kilograms divided by height in meters squared) and abdominal obesity (assessed by waist to hip ratio [WHR]) with DR in a clinical sample of Asian patients with type 2 diabetes mellitus.

View Article and Find Full Text PDF

Background: The Global Burden of Disease, Injuries, and Risk Factor study 2013 (GBD 2013) is the first of a series of annual updates of the GBD. Risk factor quantification, particularly of modifiable risk factors, can help to identify emerging threats to population health and opportunities for prevention. The GBD 2013 provides a timely opportunity to update the comparative risk assessment with new data for exposure, relative risks, and evidence on the appropriate counterfactual risk distribution.

View Article and Find Full Text PDF

Purpose: Dry eye is a common condition known to have many systemic co-morbidities. We aim to report the frequency of depression and anxiety suspects in eye clinic patients and explore the association between dry eye signs and symptoms with depression and anxiety.

Materials And Methods: Adult outpatients were recruited from dry a public tertiary ophthalmology specialist center.

View Article and Find Full Text PDF

Background: The Global Burden of Disease Study 2013 (GBD 2013) aims to bring together all available epidemiological data using a coherent measurement framework, standardised estimation methods, and transparent data sources to enable comparisons of health loss over time and across causes, age-sex groups, and countries. The GBD can be used to generate summary measures such as disability-adjusted life-years (DALYs) and healthy life expectancy (HALE) that make possible comparative assessments of broad epidemiological patterns across countries and time. These summary measures can also be used to quantify the component of variation in epidemiology that is related to sociodemographic development.

View Article and Find Full Text PDF

Objective: To investigate the effectiveness of a low vision self-management programme (LVSMP) in older adults.

Methods: Participants (n=153) were existing clients of a national low vision rehabilitation organisation randomly allocated to usual services (n=60) or usual services plus LVSMP (n=93). The LVSMP was an 8-week group programme facilitated by low vision counsellors.

View Article and Find Full Text PDF

Objective: To examine the impact of glaucoma and visual acuity (VA) and visual field (VF) losses on psychosocial functioning (PF).

Design: Cross-sectional study.

Participants: We compared PF between 192 participants with bilateral glaucoma with VA or VF losses and 40 controls from a tertiary eye hospital clinic in Singapore.

View Article and Find Full Text PDF

Background: The Millennium Declaration in 2000 brought special global attention to HIV, tuberculosis, and malaria through the formulation of Millennium Development Goal (MDG) 6. The Global Burden of Disease 2013 study provides a consistent and comprehensive approach to disease estimation for between 1990 and 2013, and an opportunity to assess whether accelerated progress has occured since the Millennium Declaration.

Methods: To estimate incidence and mortality for HIV, we used the UNAIDS Spectrum model appropriately modified based on a systematic review of available studies of mortality with and without antiretroviral therapy (ART).

View Article and Find Full Text PDF

Background: Remarkable financial and political efforts have been focused on the reduction of child mortality during the past few decades. Timely measurements of levels and trends in under-5 mortality are important to assess progress towards the Millennium Development Goal 4 (MDG 4) target of reduction of child mortality by two thirds from 1990 to 2015, and to identify models of success.

Methods: We generated updated estimates of child mortality in early neonatal (age 0-6 days), late neonatal (7-28 days), postneonatal (29-364 days), childhood (1-4 years), and under-5 (0-4 years) age groups for 188 countries from 1970 to 2013, with more than 29,000 survey, census, vital registration, and sample registration datapoints.

View Article and Find Full Text PDF

Purpose: To describe the ethnic variations in the prevalence and risk factors for undercorrected refractive error and its impact on vision-specific functioning (VF) in a multiethnic Asian population.

Methods: A total of 3353 Chinese, 3400 Indians, and 3280 Malays in Singapore participated in this population-based cross-sectional study. Distance presenting visual acuity (VA) was measured using a logarithm of the minimum angle of resolution number chart.

View Article and Find Full Text PDF

Background: Prehypertension has been shown to be an early risk factor of cardiovascular disease (CVD). We investigated the prevalence and pattern of cardiometabolic risk factors in prehypertension in three ethnic Asian populations in Singapore.

Methods: We examined data from Chinese (n=1177), Malay (n=774), and Indian (n=985) adults aged 40-80 years who participated in three independent population based studies conducted from 2004-2011 in Singapore who were free of diabetes, hypertension and previous CVD.

View Article and Find Full Text PDF

Background: To examine whether marital status is a significant determinant of visual impairment (VI) in urban multi-ethnic Asian population.

Methods: We conducted a population-based study of Singapore-resident ethnic Malays, Indians and Chinese aged ≥40 years. Ophthalmic examination included the assessment of presenting and best-corrected visual acuity (PVA and BCVA) using standardized procedures.

View Article and Find Full Text PDF

Purpose: We quantified and measured the needs for specific eye care services, including refractive services (RS), annual eye examination services (AES), cataract surgery services (CSS), and low vision services (LVS) in urban adult populations in Asia.

Methods: We conducted three population-based studies of Singapore-resident Chinese, Malays, and Indians aged ≥40 years to measure the proportion of people who needed specific eye care services.

Results: Our data included 3353 Chinese, 3280 Malays, and 3400 Indians (participation rate 73.

View Article and Find Full Text PDF

Purpose: Awareness of eye conditions aids health promotion activities and leads to better outcomes. We examined factors influencing the lack of awareness of common eye conditions in a population.

Methods: The Singapore Malay Eye Study examined 3280 (78.

View Article and Find Full Text PDF

Purpose: We determined the impact of glaucoma severity and laterality on vision-specific functioning (VF) in an Asian population.

Methods: The Singapore Malay Eye Study (SiMES) was a population-based cross-sectional study of 3280 Malays aged 40 to 80 years. VF was assessed using the VF-11 questionnaire.

View Article and Find Full Text PDF

Purpose: We investigated patients' attitudes and perceptions toward a subconjunctival implant as a novel ocular drug delivery method for glaucoma.

Methods: We recruited 344 Chinese patients with primary open angle or angle closure glaucoma currently on topical antiglaucoma medication for a minimum of six months from specialist glaucoma clinics. Sociodemographic data, and information about patients' general and ocular health were collected.

View Article and Find Full Text PDF

Purpose: To quantify the eye disease-specific impact of unilateral and bilateral vision impairment (VI) on vision-specific functioning (VF).

Design: The Singapore Indian Eye population-based study.

Participants: Ethnic Indians older than 40 years of age living in Singapore.

View Article and Find Full Text PDF

Two-thirds of the world's population with low vision resides in the Asia-Pacific region. Provision of comprehensive low vision services is important to improve vision-related quality of life (QoL) for people with this condition. This review outlines the critical issues and challenges facing the provision of low vision services in the Asia-Pacific region.

View Article and Find Full Text PDF

Objective: To identify the determinants of patients' decision-making for participation in a cataract surgery clinical trial in a tertiary care hospital.

Design: Prospective observational study.

Participants: We interviewed by questionnaire 40 patients scheduled to have cataract surgery.

View Article and Find Full Text PDF

Purpose: To determine the impact of cataracts and their types and grades on vision-specific functioning.

Design: Prospective population-based cross-sectional study.

Methods: The Singapore Indian Eye Study examined 3400 of 4497 (75.

View Article and Find Full Text PDF

Background: Use of generic multi-attribute utility instruments (MAUI) to assess the impact of diabetic retinopathy (DR) on health-related quality of life (HRQoL) has produced inconsistent findings. Therefore, we assessed the impact of DR, diabetic macular oedema (DME) and associated visual impairment on vision-related QoL (VRQoL) using a vision-specific MAUI.

Methods: In this cross-sectional study, 203 diabetic patients were recruited from specialised eye clinics in a Melbourne tertiary eye hospital.

View Article and Find Full Text PDF