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Featured researches published by Chiu Wan Ng.


The Lancet | 2006

Effect of payments for health care on poverty estimates in 11 countries in Asia: an analysis of household survey data.

Eddy van Doorslaer; Owen O'Donnell; Ravi P. Rannan-Eliya; Aparnaa Somanathan; Shiva Raj Adhikari; Charu C. Garg; Deni Harbianto; Alejandro N. Herrin; Mohammed N. Huq; Shamsia Ibragimova; Anup Karan; Chiu Wan Ng; Badri Raj Pande; Rachel H. Racelis; Sihai Tao; Keith Tin; Kanjana Tisayaticom; Laksono Trisnantoro; Chitpranee Vasavid; Yuxin Zhao

BACKGROUND Conventional estimates of poverty do not take account of out-of-pocket payments to finance health care. We aimed to reassess measures of poverty in 11 low-to-middle income countries in Asia by calculating total household resources both with and without out-of-pocket payments for health care. METHODS We obtained data on payments for health care from nationally representative surveys, and subtracted these payments from total household resources. We then calculated the number of individuals with less than the internationally accepted threshold of absolute poverty (US1 dollar per head per day) after making health payments. We also assessed the effect of health-care payments on the poverty gap--the amount by which household resources fell short of the 1 dollar poverty line in these countries. FINDINGS Our estimate of the overall prevalence of absolute poverty in these countries was 14% higher than conventional estimates that do not take account of out-of-pocket payments for health care. We calculated that an additional 2.7% of the population under study (78 million people) ended up with less than 1 dollar per day after they had paid for health care. In Bangladesh, China, India, Nepal, and Vietnam, where more than 60% of health-care costs are paid out-of-pocket by households, our estimates of poverty were much higher than conventional figures, ranging from an additional 1.2% of the population in Vietnam to 3.8% in Bangladesh. INTERPRETATION Out-of-pocket health payments exacerbate poverty. Policies to reduce the number of Asians living on less than 1 dollar per day need to include measures to reduce such payments.


American Journal of Tropical Medicine and Hygiene | 2012

Use of Multiple Data Sources to Estimate the Economic Cost of Dengue Illness in Malaysia

Donald S. Shepard; Eduardo A. Undurraga; Rosemary Susan Lees; Yara A. Halasa; Lucy Chai See Lum; Chiu Wan Ng

Dengue represents a substantial burden in many tropical and sub-tropical regions of the world. We estimated the economic burden of dengue illness in Malaysia. Information about economic burden is needed for setting health policy priorities, but accurate estimation is difficult because of incomplete data. We overcame this limitation by merging multiple data sources to refine our estimates, including an extensive literature review, discussion with experts, review of data from health and surveillance systems, and implementation of a Delphi process. Because Malaysia has a passive surveillance system, the number of dengue cases is under-reported. Using an adjusted estimate of total dengue cases, we estimated an economic burden of dengue illness of US


Amyotrophic Lateral Sclerosis | 2011

Survival and prognostic factors of motor neuron disease in a multi-ethnic Asian population.

Khean Jin Goh; Sharen Tian; Nortina Shahrizaila; Chiu Wan Ng; Chong Tin Tan

56 million (Malaysian Ringgit MYR196 million) per year, which is approximately US


PLOS ONE | 2015

Household catastrophic healthcare expenditure and impoverishment due to rotavirus gastroenteritis requiring hospitalization in malaysia.

Tharani Loganathan; Way Seah Lee; Kok-Foo Lee; Mark Jit; Chiu Wan Ng

2.03 (Malaysian Ringgit 7.14) per capita. The overall economic burden of dengue would be even higher if we included costs associated with dengue prevention and control, dengue surveillance, and long-term sequelae of dengue.


Asia-Pacific Journal of Public Health | 2015

Frail Elders in an Urban District Setting in Malaysia: Multidimensional Frailty and Its Correlates

Jeyanthini Sathasivam; Shahrul Bahyah Kamaruzzaman; Farizah Hairi; Chiu Wan Ng; Karuthan Chinna

Abstract Our objective was to determine the survival and prognostic factors of motor neuron disease (MND) in a multi-ethnic cohort of Malaysian patients. All patients seen at a university medical centre between January 2000 and December 2009 had their case records reviewed for demographic, clinical and follow-up data. Mortality data, if unavailable from records, were obtained by telephone interview of relatives or from the national mortality registry. Of the 73 patients, 64.4% were Chinese, 19.2% Malays and 16.4% Indians. Male: female ratio was 1.43: 1. Mean age at onset was 51.5 + 11.3 years. Onset was spinal in 75.3% and bulbar in 24.7% of the patients; 94.5% were ALS and 5.5% were progressive muscular atrophy (PMA). Overall median survival was 44.9 + 5.8 months. Ethnic Indians had shorter interval from symptom onset to diagnosis and shorter median survival compared to non-Indians. On Cox proportional hazards analysis, poor prognostic factors were bulbar onset, shorter interval from symptom onset to diagnosis and worse functional score at presentation. In conclusion, age of onset and median survival duration are similar to previous reports in Asians. Clinical features and prognostic factors are similar to other populations. In our cohort, ethnic Indians had more rapid disease course accounting for their shorter survival.


American Journal of Tropical Medicine and Hygiene | 2015

Cost of Dengue Vector Control Activities in Malaysia

P. Raviwharmman Packierisamy; Chiu Wan Ng; Maznah Dahlui; Jonathan Inbaraj; Venugopalan K. Balan; Yara A. Halasa; Donald S. Shepard

Background While healthcare costs for rotavirus gastroenteritis requiring hospitalization may be burdensome on households in Malaysia, exploration on the distribution and catastrophic impact of these expenses on households are lacking. Objectives We assessed the economic burden, levels and distribution of catastrophic healthcare expenditure, the poverty impact on households and inequities related to healthcare payments for acute gastroenteritis requiring hospitalization in Malaysia. Methods A two-year prospective, hospital-based study was conducted from 2008 to 2010 in an urban (Kuala Lumpur) and rural (Kuala Terengganu) setting in Malaysia. All children under the age of 5 years admitted for acute gastroenteritis were included. Patients were screened for rotavirus and information on healthcare expenditure was obtained. Results Of the 658 stool samples collected at both centers, 248 (38%) were positive for rotavirus. Direct and indirect costs incurred were significantly higher in Kuala Lumpur compared with Kuala Terengganu (US


Pediatric Infectious Disease Journal | 2016

The Hidden Health and Economic Burden of Rotavirus Gastroenteritis in Malaysia: An Estimation Using Multiple Data Sources.

Tharani Loganathan; Chiu Wan Ng; Way Seah Lee; Mark Jit

222 Vs. US


Journal of Population Research | 2008

Ethnic Dimensions of Gender Differentials in Mortality in Malaysia

Shyamala Nagaraj; Nai-Peng Tey; Chiu Wan Ng; Balambigai Balakrishnan

45; p<0.001). The mean direct and indirect costs for rotavirus gastroenteritis consisted 20% of monthly household income in Kuala Lumpur, as compared with only 5% in Kuala Terengganu. Direct medical costs paid out-of-pocket caused 141 (33%) households in Kuala Lumpur to experience catastrophic expenditure and 11 (3%) households to incur poverty. However in Kuala Terengganu, only one household (0.5%) experienced catastrophic healthcare expenditure and none were impoverished. The lowest income quintile in Kuala Lumpur was more likely to experience catastrophic payments compared to the highest quintile (87% vs 8%). The concentration index for out-of-pocket healthcare payments was closer to zero at Kuala Lumpur (0.03) than at Kuala Terengganu (0.24). Conclusions While urban households were wealthier, healthcare expenditure due to gastroenteritis had more catastrophic and poverty impact on the urban poor. Universal rotavirus vaccination would reduce both disease burden and health inequities in Malaysia.


PLOS ONE | 2016

Are the Poor Dying Younger in Malaysia? An Examination of the Socioeconomic Gradient in Mortality

Jeevitha Mariapun; Noran Naqiah Hairi; Chiu Wan Ng

In the past decade, the population in Malaysia has been rapidly ageing. This poses new challenges and issues that threaten the ability of the elderly to independently age in place. A multistage cross-sectional study on 789 community-dwelling elderly individuals aged 60 years and above was conducted in an urban district in Malaysia to assess the geriatric syndrome of frailty. Using a multidimensional frailty index, we detected 67.7% prefrail and 5.7% frail elders. Cognitive status was a significant correlate for frailty status among the respondents as well as those who perceived their health status as very poor or quite poor; but self-rated health was no longer significant when controlled for sociodemographic variables. Lower-body weakness and history of falls were associated with increasing frailty levels, and this association persisted in the multivariate model. This study offers support that physical disability, falls, and cognition are important determinants for frailty. This initial work on frailty among urban elders in Malaysia provides important correlations and identifies potential risk factors that can form the basis of information for targeted preventive measures for this vulnerable group in their prefrail state.


Asia-Pacific Journal of Public Health | 2015

The Cost of Dengue Vector Control Activities in Malaysia by Different Service Providers

P. Raviwharmman Packierisamy; Chiu Wan Ng; Maznah Dahlui; B. Venugopalan; Yara A. Halasa; Donald S. Shepard

Dengue fever, an arbovirus disease transmitted by Aedes mosquitoes, has recently spread rapidly, especially in the tropical countries of the Americas and Asia-Pacific regions. It is endemic in Malaysia, with an annual average of 37,937 reported dengue cases from 2007 to 2012. This study measured the overall economic impact of dengue in Malaysia, and estimated the costs of dengue prevention. In 2010, Malaysia spent US

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