ZEN YANG ANG

Mr. ZEN YANG ANG

Institute for Health Systems Research, National Institutes of Health, Ministry of Health Malaysia
orcid

Research Focus & Metrics

Academic Career Length

11Years (2016-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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ZAZEN YANG ANG
ZEN YANG ANG
CYCheah Kit Yee
Cheah Kit Yee
SMShakirah binti Md.Sharif
Shakirah binti Md.Sharif
WFWeng Hong Fun
Weng Hong Fun
AJAnis Syakira Jailani
Anis Syakira Jailani
Sondi SararaksSondi Sararaks
Sondi Sararaks
This study aimed to highlight the COVID-19 response by the Ministry of Health (MOH) and the Government of Malaysia in order to share Malaysia’s lessons and to improve future pandemic preparedness. The team conducted a rapid review using publicly available information from MOH, PubMed, and World Health Organisation (WHO) Global Research on Coronavirus Disease Database to compile Malaysia’s responses during the COVID-19 pandemic. Measures taken between 31 December 2019 and 3 June 2020 were classified into domains as well as the pillars described in the WHO COVID-19 Strategic Preparedness and Response Plan (WHO SPRP). Malaysia’s response incorporated all pillars in the WHO SPRP and consisted of five domains, (i) whole-of-government, (ii) cordon sanitaire/lockdown, (iii) equity of access to services and supports, (iv) quarantine and isolation systems, and (v) legislation and enforcement. Some crucial measures taken were activation of a centralised multi-ministerial coordination council where MOH acted as an advisor, with collaboration from non-government organisations and private sectors which enabled an effective targeted screening approach, provision of subsidised COVID-19 treatment and screening, isolation or quarantine of all confirmed cases, close contacts and persons under investigation, with all strategies applied irrespective of citizenship. This was provided for by way of the Prevention and Control of Infectious Diseases Act 1988. A combination of these measures enabled the nation to contain the COVID-19 outbreak by the end of June 2020.

1 October 2016 in Drug Design, Development and Therapy
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Journal Article
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ZAZEN YANG ANG
ZEN YANG ANG
MBMichael Boddy
Michael Boddy
YLYandi Liu
Yandi Liu
BSBruce Sunderland
Bruce Sunderland
Apomorphine in solution undergoes rapid autoxidation, producing greenish colored solutions, making it difficult to formulate as a stable pharmaceutical solution. To identify the optimum antioxidant agent/combination for apomorphine solution, a high performance liquid chromatography assay was used to study the stability of 50 µg/mL apomorphine HCl in 0.1% L-ascorbic acid (AA), 0.1% sodium metabisulfite (SMB), 0.1% EDTA, and in selected combinations at 25°C, 32°C, and 37°C over a period of 14 days. The stability of apomorphine HCl (10 mg/mL) in 0.1% AA solution and in 0.1% EDTA solution at 25°C and 37°C was also evaluated. Apomorphine HCl solution (50 µg/mL) in 0.1% AA plus 0.1% SMB solution retained 99.7% (at 25°C) and 95.9% (at 37°C) of the initial concentration, as 0.1% AA plus SMB solution minimized the reactive oxygen content in solution which, in turn, reduced the oxidation rate of apomorphine HCl, and there was no green coloration perceptible. Conversely, apomorphine HCl solution (50 µg/mL) in 0.1% SMB solution was unstable as only 0.53% (at 25°C) and 0.06% (at 37°C) of the initial concentration was retained after 14 days. All 10 mg/mL apomorphine HCl samples were stable in both studies. The initial concentration of apomorphine HCl solution markedly affected its rate of oxidation and discoloration. The addition of 0.1% AA to a current formulation of apomorphine HCl injection (Apomine®), which contains SMB as an antioxidant, was recommended as providing the most stable solution.

3 March 2022 in BMC Geriatrics
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FLFatt Soon Lee
Fatt Soon Lee
SSSondi Sararaks
Sondi Sararaks
WYWeng Keong Yau
Weng Keong Yau
ZAZEN YANG ANG
ZEN YANG ANG
AJAnis-Syakira Jailani
Anis-Syakira Jailani
MHMaimunah A. Hamid
Maimunah A. Hamid
Background: The older person is at greater risk of falls due to multiple intrinsic and extrinsic factors. This is compounded when the elderly is admitted to hospitals, as they are acutely ill and placed in an unfamiliar environment. Delirium and polypharmacy further complicate these problems. As falls reflect quality of care with potential for grave outcomes, this study aimed to identify the extent and risk of falls in public hospitals. Methods: We conducted a nested case control study in 12 public hospitals in Malaysia. In the cohort section, we screened all inpatients 60 years of age and above daily until discharge, or the end of the study period. Daily, we identified those who fell, inclusive of near falls, in the preceding 24 h. Our enumerators interviewed patients on experience of fall, and supplemented data from the nurses and caregivers. For each case, ten controls were chosen. Results: The incidence of falls/near falls was 1.0 per 1000 patient days (95% CI: 0.9, 1.1). Intrinsic risk factors found to be significant included patients who were not from a nursing home or not cared for by a domestic helper prior to admission, had prior history of indoor fall either in home or hospital, had four or more clinical diagnoses or exited from the bed on the weak side. Significant extrinsic factors were the absence of transfer bar in toilet, call bells, light switches or walking aids that were not within reach, as well as not having a walking aid. Non-sturdy chair was associated with lesser falls than when sturdy chairs with armrests were present. Conclusion: Querying patients for falls produced better results than incident reporting. Several intrinsic factors such as history of indoor or in-hospital fall, having four or more clinical diagnoses or exiting from weaker side and residence history may help to identify those at higher risk. Addressing significant extrinsic factors such as transfer bars and the identification of switches may help in reducing falls risk in hospitals. Trial registration: This study was registered in National Medical Research Register of Malaysia (NMRR-07-772-1044; date 26/05/2008) with Ethics Approval from Medical Research and Ethics Committee (MREC: MRG-07-LOI-HSR-1).

6 December 2019 in Journal of Oncology Pharmacy Practice
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ZAZEN YANG ANG
ZEN YANG ANG
CYCheah Kit Yee
Cheah Kit Yee
NANadiah B Abdullah
Nadiah B Abdullah
SSSafawati B Samsuri
Safawati B Samsuri
SLSiao Hui Lee
Siao Hui Lee
MSMalathi AP Sriraman
Malathi AP Sriraman
Purpose: To identify the cost and reasons of returned parenteral chemotherapy regimens at a tertiary hospital in Kuala Lumpur, Malaysia. Methods: Data were retrospectively extracted from all the Chemotherapy Return Forms in 2016, which is a compulsory documentation accompanying each return of parenteral chemotherapy regimen. The following data were extracted: patient’s diagnosis, gender, location of treatment (i.e. ward/daycare clinic), start date of chemotherapy regimen, type of cytotoxic drug returned, dose of cytotoxic drug returned, number of cytotoxic drug preparations returned and reason for return as well as whether the returned cytotoxic drug preparations could be re-dispensed. The cost of wastage was calculated based on the cost per mg (or per unit) of the particular returned cytotoxic drug. Results: One hundred and fifty-nine cases of returned chemotherapy regimen comprising of 231 parenteral cytotoxic drug preparations were analysed. The total cost of returned chemotherapy regimen for 2016 was €3632, with €756 (20.8%) worth of chemotherapy regimens returned due to preventable reasons and €2876 (79.2%) worth of chemotherapy regimens returned due to non-preventable reasons. Approximately 50% of cases returned chemotherapy regimen were due to deterioration of patient’s clinical condition and another 24.5% of cases of returned chemotherapy regimen were attributed to adverse drug reactions. Conclusion: Wastage associated to non-preventable reasons such as adverse drug reactions and preventable causes like refusal of patients can be further reduced by using newer healthcare innovations and establishment of written institutional protocols or standard operating procedures as references for in-charge healthcare personnel when cytotoxic drug-related issues occur. Adoption of cost-saving strategies that have been proven by studies could further improve current cost containment strategies.

16 October 2023 in Western Pacific Surveillance and Response Journal
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Journal Article
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ZAZEN YANG ANG
ZEN YANG ANG
NBNur Zahirah Balqis-Ali
Nur Zahirah Balqis-Ali
AJAnis-Syakira Jailani
Anis-Syakira Jailani
YKYuke-Lin Kong
Yuke-Lin Kong
SSShakirah Md Sharif
Shakirah Md Sharif
WFWeng Hong Fun
Weng Hong Fun
Objective: Effective prevention and control measures are essential to contain outbreaks of infectious diseases, such as coronavirus disease (COVID-19). Understanding the characteristics of case clusters can contribute to determining which prevention and control measures are needed. This study describes the characteristics of COVID-19 case clusters in Malaysia, the method used to detect a cluster’s index case and the mode of early transmission, using the seven cluster categories applied in Malaysia. Methods: This cross-sectional study collected publicly available data on COVID-19 clusters occurring in Malaysia from 1 March 2020 to 31 May 2021. The characteristics of cases were described by category, and their associations with several outcomes were analysed. Descriptive analyses were performed to explore the method used to detect the index case and the mode of early transmission, according to cluster category. Results: A total of 2188 clusters were identified. The workplace cluster category had the largest proportion of clusters (51.5%, 1126/2188 clusters), while the custodial settings category had the largest median cluster size (178 cases per cluster) and longest median duration of cluster (51 days). The high-risk groups category had the highest mortality. There were significant differences in cluster size, duration and rate of detection across the categories. Targeted screening was most commonly used to detect index cases, especially in custodial settings, and in imported and workplace clusters. Household–social and social–workplace contacts were the most common modes of early transmission across most categories. Discussion: Targeted screening might effectively reduce the size and duration of COVID-19 clusters. Measures to prevent and control COVID-19 outbreaks should be continually adjusted based on ongoing assessments of the unique context of each cluster.

14 October 2024 in BJU International
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Journal Article
Open access
ZAZEN YANG ANG
ZEN YANG ANG
YKYuke‐Lin Kong
Yuke‐Lin Kong
ZNZarith Nameyrra Md Nesran
Zarith Nameyrra Md Nesran
SLShaun Wen Huey Lee
Shaun Wen Huey Lee
Objective: To review and compare the efficacy of different delivery modes of decision aids (DAs), including computer‐based, print‐based, multimedia‐based, video‐based, and website‐based on decision‐making outcomes for prostate cancer screening compared to usual care (UC) and among the delivery modes. Methods: PubMed, the Excerpta Medica dataBASE (EMBASE), Cumulative Index to Nursing and Allied Health Literature (CINAHL), Google Advanced Search, and Turning Research Into Practice (TRIP) Database were systematically searched from inception to August 2023. The primary outcomes were knowledge level, knowledge scores, participation in shared decision‐making (SDM), decisional conflict, and preference for SDM participation. Secondary outcomes were the proportion of subjects who underwent screening (actual screening utilisation) and the proportion of subjects who intended to be screened (intention to undergo screening). Network and pairwise meta‐analyses were performed using random‐effects models. Results: Seven systematic reviews were included. Network meta‐analysis found that multimedia (relative risk [RR] 1.51, 95% confidence interval [CI] 1.02–2.24), print (RR 1.82, 95% CI 1.23–2.69), and website‐based (RR 1.99, 95% CI 1.32–3.01) DAs significantly increased participation in SDM compared to the computer‐based DA. There was a significant reduction in the actual screening utilisation in the computer DA arm compared to the other delivery modes. No significant differences between all delivery modes were noted on knowledge levels, knowledge scores, decisional conflict, preference for SDM participation, and intention to undergo screening. The highest mean surface under the cumulative ranking curve for all primary outcomes showed that website‐based was the most effective delivery mode, followed by print‐based DA. The pairwise meta‐analysis showed a significant increase in participants’ knowledge level, knowledge scores, a reduced intention to undergo screening and actual screening utilisation compared to UC. Conclusions: The findings suggest that different types of DAs have varying levels of effectiveness in increasing knowledge level, knowledge scores, participation in SDM, and influencing screening behaviours. While website‐based DA appeared the most effective, employing the print‐based DA could be a practical solution in settings with limited resources.