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  1. Lim AW, Leong CT, Salowi MA, Lim YMF, Wong WJ, Hwong WY
    Public Health Pract (Oxf), 2024 Jun;7:100469.
    PMID: 38323125 DOI: 10.1016/j.puhip.2024.100469
    BACKGROUND: Elective surgeries were suspended during the national lockdown in March 2020 to curb the spread of the COVID-19 pandemic in Malaysia. We sought to evaluate the impact of the lockdown on cataract surgeries and suggest lessons for future outbreaks.

    STUDY DESIGN: We conducted an interrupted time series analysis to examine rates of cataract surgery before and during the lockdown.

    METHODS: We used national cataract surgical data between 2015 and 2021 from the Malaysian Cataract Surgery Registry. Segmented regression with a seasonally adjusted Poisson model was used for the analysis. Stratified analyses were performed to establish whether the effect of the lockdown on cataract surgeries varied by hospital designation, type of cataract service, sex, and age groups.

    RESULTS: Cataract surgeries began falling in March 2020 at the onset of the lockdown, reached a trough in April 2020, and subsequently increased but never recovered to pre-lockdown levels. Cataract surgical rates in December 2021 were still 43 % below the expected surgical volume, equivalent to 2513 lost cataract surgeries. There was no evidence of a differential effect of the lockdown between COVID-19 designated and non-COVID-19 designated hospitals. The relative decrease in cataract surgical rates appears to have been greatest in outreach services and in people 40 years and older.

    CONCLUSIONS: The lockdown caused an immediate reduction in cataract surgical rates to nearly half of its baseline rate. Despite its gradual recovery, further delays remain to be expected should there be no redistribution or increase in resources to support backlogs and incoming new cases.

  2. Hwong WY, Ng SW, Tong SF, Ab Rahman N, Law WC, Wong SK, et al.
    BMC Health Serv Res, 2024 Jan 05;24(1):34.
    PMID: 38183003 DOI: 10.1186/s12913-023-10397-8
    BACKGROUND: Translation into clinical practice for use of intravenous thrombolysis (IVT) for the management of ischemic stroke remains a challenge especially across low- and middle-income countries, with regional inconsistencies in its rate. This study aimed at identifying factors that influenced the provision of IVT and the variation in its rates in Malaysia.

    METHODS: A multiple case study underpinning the Tailored Implementation for Chronic Diseases framework was carried out in three public hospitals with differing rates of IVT using a multiple method design. Twenty-five in-depth interviews and 12 focus groups discussions were conducted among 89 healthcare providers, along with a survey on hospital resources and a medical records review to identify reasons for not receiving IVT. Qualitative data were analysed using reflective thematic method, before triangulated with quantitative findings.

    RESULTS: Of five factors identified, three factors that distinctively influenced the variation of IVT across the hospitals were: 1) leadership through quality stroke champions, 2) team cohesiveness which entailed team dynamics and its degree of alignment and, 3) facilitative work process which included workflow simplification and familiarity with IVT. Two other factors that were consistently identified as barriers in these hospitals included patient factors which largely encompassed delayed presentation, and resource constraints. About 50.0 - 67.6% of ischemic stroke patients missed the opportunity to receive IVT due to delayed presentation.

    CONCLUSIONS: In addition to the global effort to explore sustainable measures to improve patients' emergency response for stroke, attempts to improve the provision of IVT for stroke care should also consider the inclusion of interventions targeting on health systems perspectives such as promoting quality leadership, team cohesiveness and workflow optimisation.

  3. Yip YY, Hwong WY, McCarthy SA, Hassan Chin AA, Woon YL
    J Palliat Care, 2023 Apr;38(2):111-125.
    PMID: 36464769 DOI: 10.1177/08258597221143195
    Background: Addressing timely community palliative care integration is prioritized due to the increased burden of noncommunicable diseases. Objectives: To compare referral-to-death duration among palliative cancer and noncancer patients and to determine its associated factors in a Malaysian community palliative care center. Methods: This retrospective cohort study included decedents referred to a Malaysian community palliative care center between January 2017 and December 2019. Referral-to-death is the interval between the date of community palliative care referral and to date of death. Besides descriptive analyses, negative binomial regression analyses were conducted to identify factors associated with referral-to-death among both groups. Results: Of 4346 patients referred, 86.7% (n  =  3766) and 13.3% (n  =  580) had primary diagnoses of cancer and noncancer respectively. Median referral-to-death was 32 days (interquartile range [IQR]: 12-81) among cancer patients and 19 days (IQR: 7-78) among noncancer patients. The shortest referral-to-death among cancer patients was for liver cancer (median: 22 days; IQR: 8-58.5). Noncancer patients with dementia, heart failure, and multisystem organ failure had the shortest referral-to-death at 14 days. Among cancer patients, longer referral-to-death was associated with women compared to men (IRR: 1.26; 95% CI: 1.16-1.36) and patients 80 to 94 years old compared to those below 50 years old (IRR: 1.19; 95% CI: 1.02-1.38). Cancer patients with analgesics prescribed before or upon referral had 29% fewer palliative care days compared to no prescribing analgesics. In contrast, noncancer patients 50 to 64 years old had shorter referral-to-death compared to those below 50 years old (IRR: 0.51; 95% CI: 0.28-0.91). Conclusion: Shorter referral-to-death among noncancer patients indicated possible access inequities with delayed community palliative care integration. Factors associated with referral-to-death are considered in developing targeted approaches ensuring timely and equitable community palliative care.
  4. Hwong WY, Ng SW, Tong SF, Ab Rahman N, Law WC, Kaman Z, et al.
    Front Neurol, 2022;13:1048807.
    PMID: 36504666 DOI: 10.3389/fneur.2022.1048807
    INTRODUCTION: Translation of evidence into clinical practice for use of intravenous thrombolysis in acute stroke care has been slow, especially across low- and middle-income countries. In Malaysia where the average national uptake was poor among the public hospitals in 2018, one hospital intriguingly showed comparable thrombolysis rates to high-income countries. This study aimed to explore and provide in-depth understanding of factors and explanations for the high rates of intravenous stroke thrombolysis in this hospital.

    METHODS: This single case study sourced data using a multimethod approach: (1) semi-structured in-depth interviews and focus group discussions, (2) surveys, and (3) review of medical records. The Tailored Implementation of Chronic Diseases (TICD) framework was used as a guide to understand the determinants of implementation. Twenty-nine participants comprising the Hospital Director, neurologists, emergency physicians, radiologists, pharmacists, nurses and medical assistants (MAs) were included. Thematic analyses were conducted inductively before triangulated with quantitative analyses and document reviews.

    RESULTS: Favorable factors contributing to the uptake included: (1) cohesiveness of team members which comprised of positive interprofessional team dynamics, shared personal beliefs and values, and passionate leadership, and (2) facilitative work process through simplification of workflow and understanding the rationale of the sense of urgency. Patient factors was a limiting factor. Almost two third of ischemic stroke patients arrived at the hospital outside the therapeutic window time, attributing patients' delayed presentation as a main barrier to the uptake of intravenous stroke thrombolysis. One other barrier was the availability of resources, although this was innovatively optimized to minimize its impact on the uptake of the therapy. As such, potential in-hospital delays accounted for only 3.8% of patients who missed the opportunity to receive thrombolysis.

    CONCLUSIONS: Despite the ongoing challenges, the success in implementing intravenous stroke thrombolysis as standard of care was attributed to the cohesiveness of team members and having facilitative work processes. For countries of similar settings, plans to improve the uptake of intravenous stroke thrombolysis should consider the inclusion of interventions targeting on these modifiable factors.

  5. Hwong WY, Ang SH, Bots ML, Sivasampu S, Selvarajah S, Law WC, et al.
    Glob Heart, 2021 05 26;16(1):39.
    PMID: 34211825 DOI: 10.5334/gh.791
    Background: Data on nationwide trends for stroke metrics are crucial to understand the extent of the disease burden to a country's health system. Yet, this information remains scarce in low- and middle-income countries.

    Objectives: This study investigated trends of stroke incidence and 28-day all-cause mortality after a stroke from 2008 to 2016 in Malaysia, through linkage across national data sources.

    Methods: Hospital admissions with a principal diagnosis of stroke or transient ischemic attack were included. Cases with first stroke were identified through linkage of hospital admission registers where age and sex-standardized trends of stroke incidence and its subtypes were calculated. By linking hospital registers to the National Death Register, the 28-day all-cause mortality rates after a stroke were estimated. Mann-Kendall's test was used for trend evaluation.

    Results: From 243,765 records, the trend of stroke incidence showed an increase of 4.9% in men and a drop of 3.8% among women. Incidences were higher in men, at 99.1 per 100,000 population in 2008 and 103.9 per 100,000 in 2016 than women (80.3 per 100,000 in 2008 and 77.2 per 100,000 in 2016). There was a substantial increase in stroke incidence among those below 65 years old, with the largest increase of 53.3% in men aged between 35-39 years and 50.4% in women of similar age group. The trend for 28-day all-cause mortality showed a decline for men at -13.1% and women, -10.6%. Women had higher mortality from stroke (22.0% in 2008 and 19.7% in 2016) than men (19.4% in 2008 to 17.2% in 2016).

    Conclusion: This first empirical study on stroke trends in Malaysia revealed a worrying increase in stroke incidence among the younger population. Despite a declining trend, mortality rates remained moderately high especially in women. Comprehensive strategies to strengthen the prevention and management of stroke care are warranted.

  6. Ang SH, Hwong WY, Bots ML, Sivasampu S, Abdul Aziz AF, Hoo FK, et al.
    PLoS One, 2021;16(1):e0245448.
    PMID: 33465103 DOI: 10.1371/journal.pone.0245448
    BACKGROUND AND OBJECTIVES: Risk of readmissions is an important quality indicator for stroke care. Such information is limited among low- and middle-income countries. We assessed the trends for 28-day readmissions after a stroke in Malaysia from 2008 to 2015 and evaluated the causes and factors associated with readmissions in 2015.

    METHODS: Using the national hospital admission records database, we included all stroke patients who were discharged alive between 2008 and 2015 for this secondary data analysis. The risk of readmissions was described in proportion and trends. Reasons were coded according to the International Classification of Diseases, 10th Edition. Multivariable logistic regression was performed to identify factors associated with readmissions.

    RESULTS: Among 151729 patients, 11 to 13% were readmitted within 28 days post-discharge from their stroke events each year. The trend was constant for ischemic stroke but decreasing for hemorrhagic stroke. The leading causes for readmissions were recurrent stroke (32.1%), pneumonia (13.0%) and sepsis (4.8%). The risk of 28-day readmission was higher among those with stroke of hemorrhagic (adjusted odds ratio (AOR): 1.52) and subarachnoid hemorrhage (AOR: 2.56) subtypes, and length of index admission >3 days (AOR: 1.48), but lower among younger age groups of 35-64 (AORs: 0.61-0.75), p values <0.001.

    CONCLUSION: The risk of 28-day readmission remained constant from 2008 to 2015, where one in eight stroke patients required readmission, mainly attributable to preventable causes. Age, ethnicity, stroke subtypes and duration of the index admission influenced the risk of readmission. Efforts should focus on minimizing potentially preventable admissions, especially among those at higher risk.

  7. Hwong WY, Lim YMF, Khoo EM, Sivasampu S
    Int J Clin Pharm, 2020 Apr;42(2):489-499.
    PMID: 31960271 DOI: 10.1007/s11096-020-00966-w
    Background Information on the extent of high-risk prescribing for nonsteroidal anti-inflammatory drugs (NSAIDs) across developing countries is scarce. Objectives This study examines the prescribing pattern for NSAIDs in primary care, assesses the extent of high-risk NSAIDs prescribing and identifies associated factors. Setting 129 public and 416 private primary care clinics in Malaysia. Methods Data were derived from the National Medical Care Survey 2014, a cross-sectional survey on primary care morbidity patterns and clinical activities in Malaysia. Types of NSAIDs, indications for NSAIDs use and proportion of high-risk NSAIDs prescribing were assessed. Factors associated with high-risk NSAIDs prescribing were identified with a multivariable logistic regression. Weighted results, adjusted for sampling design and non-response were presented. Main outcome measures Prescribing pattern of NSAIDs, proportion of high-risk NSAIDs prescribing and its associated factors. Results Among the 55,489 patients who received NSAIDs, diclofenac was the most frequently prescribed NSAID (40.5%, 95% CI 40.1-40.9%), followed by mefenamic acid (29.2%, 95% CI 28.8-29.6%). The commonest indications for NSAIDs use were musculoskeletal condition and respiratory tract infection, both at 17.8% (95% CI 17.4-18.1%). A total of 22.9% (95% CI 22.6-23.3%) patients received high-risk NSAID prescriptions. Of these, 47.8% (95% CI 46.9-48.7%) did not receive adequate gastroprotection despite being at risk, 24.8% (95% CI 24.0-25.5%) were prescribed NSAIDs despite having cardiovascular comorbidities and 22.4% (95% CI 21.7-23.2%) were prescribed high-dose NSAIDs. The odds of receiving high-risk NSAID prescriptions increased with the number of drugs prescribed (OR 1.23, 95% CI 1.06-1.43) and the number of diagnoses in one visit (OR 2.21, 95% CI 1.71-2.86). The odds of being prescribed high-risk NSAID prescriptions were lower in patients with secondary (OR 0.52, 95% CI 0.35-0.77) and tertiary education (OR 0.39, 95% CI 0.22-0.68) compared to patients without formal education. Patients' citizenship, indication for NSAID prescriptions and whether a medical certificate was issued were also significantly associated with the likelihood of receiving high-risk NSAID prescriptions. Conclusions A quarter of NSAIDs prescribed in Malaysian primary care setting is categorised as high-risk prescribing. Targeted strategies are necessary to improve patient safety.
  8. Hwong WY, Bots ML, Selvarajah S, Sivasampu S, Reidpath DD, Law WC, et al.
    Int J Stroke, 2019 10;14(8):826-834.
    PMID: 30843480 DOI: 10.1177/1747493019832995
    BACKGROUND: Sex differences in cardiovascular diseases generally disadvantage women, particularly within developing regions.

    AIMS: This study aims to examine sex-related differences in stroke metrics across Southeast Asia in 2015. Furthermore, relative changes between sexes are compared from 1990 to 2015.

    METHODS: Data were sourced from the Global Burden of Disease Study. Incidence and mortality from ischemic and hemorrhagic strokes were explored with the following statistics derived: (1) women-to-men incidence/mortality ratio and (2) relative percentage change in rate.

    RESULTS: Women had lower incidence and mortality from stroke compared to men. Notable findings include higher ischemic stroke incidence for women at 30-34 years in high-income countries (women-to-men ratio: 1.3, 95% CI: 0.1, 16.2 in Brunei and 1.3, 95% CI: 0.5, 3.2 in Singapore) and the largest difference between sexes for ischemic stroke mortality in Vietnam and Myanmar across most ages. Within the last 25 years, greater reductions for ischemic stroke metrics were observed among women compared to men. Nevertheless, women below 40 years in some countries showed an increase in ischemic stroke incidence between 0.5% and 11.4%, whereas in men, a decline from -4.2% to -44.2%. Indonesia reported the largest difference between sexes for ischemic stroke mortality; a reduction for women whereas an increase in men. For hemorrhagic stroke, findings were similar: higher incidence among young women in high-income countries and greater reductions for stroke metrics in women than men over the last 25 years.

    CONCLUSIONS: Distinct sex-specific differences observed across Southeast Asia should be accounted in future stroke preventive guidelines.

  9. Hwong WY, Abdul Aziz Z, Sidek NN, Bots ML, Selvarajah S, Kappelle LJ, et al.
    BMC Neurol, 2017 Nov 23;17(1):203.
    PMID: 29169331 DOI: 10.1186/s12883-017-0984-1
    BACKGROUND: Evaluation of secondary stroke prevention in low and middle-income countries remains limited. This study assessed the prescription of secondary preventive drugs among ischemic stroke patients upon hospital discharge in Malaysia and identified factors related to the prescribing decisions.

    METHODS: From Malaysian National Stroke Registry, we included patients with non-fatal ischemic stroke. Prescriptions of antiplatelet, anticoagulants, antihypertensive drugs and lipid-lowering drugs were assessed. Multi-level logistic regressions were performed to determine the relation between potential factors and drug prescriptions.

    RESULTS: Of 5292 patients, 48% received antihypertensive drugs, 88.9% antiplatelet and 88.7% lipid-lowering drugs upon discharge. Thirty-three percent of patients with an indication for anticoagulants (n = 391) received it. Compared to patients <=50 years, patients above 70 years were less likely to receive antiplatelet (OR: 0.72, 95% CI: 0.50-1.03), lipid-lowering drugs (OR: 0.66, 95% CI: 0.45-0.95) and anticoagulants (OR: 0.27, 95% CI: 0.09-0.83). Patients with moderate to severe disability upon discharge had less odds of receiving secondary preventive drugs; an odds ratio of 0.57 (95% CI: 0.45-0.71) for antiplatelet, 0.86 (95% CI: 0.75-0.98) for antihypertensive drugs and 0.78 (95% CI: 0.63-0.97) for lipid-lowering drugs in comparison to those with minor disability. Having prior specific comorbidities and drug prescriptions significantly increased the odds of receiving these drugs. No differences were found between sexes and ethnicities.

    CONCLUSIONS: Prescription of antihypertensive drugs and anticoagulants among ischemic stroke patients in Malaysia were suboptimal. Efforts to initiate regular clinical audits to evaluate the uptake and effectiveness of secondary preventive strategies are timely in low and middle-income settings.

  10. Hwong WY, Bots ML, Selvarajah S, Abdul Aziz Z, Sidek NN, Spiering W, et al.
    PLoS One, 2016;11(11):e0166524.
    PMID: 27846309 DOI: 10.1371/journal.pone.0166524
    BACKGROUND: The increase in angiotensin II (Ang II) formation by selected antihypertensive drugs is said to exhibit neuroprotective properties, but this translation into improvement in clinical outcomes has been inconclusive. We undertook a study to investigate the relationship between types of antihypertensive drugs used prior to a stroke event and ischemic stroke severity. We hypothesized that use of antihypertensive drugs that increase Ang II formation (Ang II increasers) would reduce ischemic stroke severity when compared to antihypertensive drugs that suppress Ang II formation (Ang II suppressors).

    METHODS: From the Malaysian National Neurology Registry, we included hypertensive patients with first ischemic stroke who presented within 48 hours from ictus. Antihypertensive drugs were divided into Ang II increasers (angiotensin-I receptor blockers (ARBs), calcium channel blockers (CCBs) and diuretics) and Ang II suppressors (angiotensin-converting-enzyme inhibitors (ACEIs) and beta blockers). We evaluated stroke severity during admission with the National Institute of Health Stroke Scale (NIHSS). We performed a multivariable logistic regression with the score being dichotomized at 15. Scores of less than 15 were categorized as less severe stroke.

    RESULTS: A total of 710 patients were included. ACEIs was the most commonly prescribed antihypertensive drug in patients using Ang II suppressors (74%) and CCBs, in patients prescribed with Ang II increasers at 77%. There was no significant difference in the severity of ischemic stroke between patients who were using Ang II increasers in comparison to patients with Ang II suppressors (OR: 1.32, 95%CI: 0.83-2.10, p = 0.24).

    CONCLUSION: In our study, we found that use of antihypertensive drugs that increase Ang II formation was not associated with less severe ischemic stroke as compared to use of antihypertensive drugs that suppress Ang II formation.

  11. Hwong WY, Bots ML, Selvarajah S, Kappelle LJ, Abdul Aziz Z, Sidek NN, et al.
    PLoS One, 2016;11(10):e0165330.
    PMID: 27768752 DOI: 10.1371/journal.pone.0165330
    A shortage of computed tomographic (CT) machines in low and middle income countries often results in delayed CT imaging for patients suspected of a stroke. Yet, time constraint is one of the most important aspects for patients with an ischemic stroke to benefit from thrombolytic therapy. We set out to assess whether application of the Siriraj Stroke Score is able to assist physicians in prioritizing patients with a high probability of having an ischemic stroke for urgent CT imaging.
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