1.Prevalence of Polypharmacy and Potentially Inappropriate Prescribing (PIP) among Older Adults Aged 65 Years and above in Brunei Darussalam
Sebastian Eng Chong KOH ; Maggie SIM ; Lina Maziyyah PG METUSSIN ; Pey Siaw LIM ; Su Ying YEO ; Yung Shin YEO ; Wai See WONG ; Shyh Poh TEO ; Li Ling CHAW
Brunei International Medical Journal 2026;22():97-104
Introduction: Polypharmacy and potentially inappropriate prescribing (PIP) are increasingly recognised as important contributors to medication -related harm among older adults. However, published national data on the prevalence of polypharmacy and PIP in Brunei Darussalam are unavailable. The objectives of this study was to determine the prevalence of polypharmacy and PIP among adults aged 65 years and above in Brunei Darussalam using Screening Tool of Older Persons ’ potentially inappropriate Prescriptions (STOPP) version 2 criteria. Materials and Methods: A retrospective cross -sectional study was conducted using data from the Brunei Healthcare Information Management System (Bru -HIMS). A stratified proportional random sample of 2,000 older adults with documented medical encounters in 2016 was selected. Polypharmacy was defined as the concurrent use of five or more medications. PIP was assessed using STOPP version 2 criteria. Descriptive statistics were used to summarise prescribing patterns. Results: Of the 2000 older adults included (mean age 73.0 ± 6.6 years), 1,181 (59.1%) had polypharmacy. Among those with polypharmacy, 1,057 (89.5%) could be assessed using STOPP criteria, and 206 (19.5%) had at least one PIP. The most frequently identified PIPs involved prolonged use of proton pump inhibitors for uncomplicated peptic ulcer disease at full therapeutic dosage for more than eight weeks, where dose reduction, discontinuation, or transition to maintenance therapy (e.g. H2 receptor antagonists) is indicated, prescribing without evidence -based indication, duplication of drug classes, use of ACE inhibitors or angiotensin receptor blockers in patients with hyperkalaemia, and use of first -generation antihistamines. Conclusion: Polypharmacy and PIP are common among older adults in Brunei Darussalam. The findings highlight the need for systematic medication review and deprescribing strategies to optimise pharmacotherapy and improve medication safety in older populations
2.Prevalence of Polypharmacy and Potentially Inappropriate Prescribing (PIP) among Older Adults Aged 65 Years and above in Brunei Darussalam
Sebastian Eng Chong KOH ; Maggie SIM ; Lina Maziyyah PG METUSSIN ; Pey Siaw LIM ; Su Ying YEO ; Yung Shin YEO ; Wai See WONG ; Shyh Poh TEO ; Li Ling CHAW
Brunei International Medical Journal 2026;22():97-104
Introduction: Polypharmacy and potentially inappropriate prescribing (PIP) are increasingly recognised as important contributors to medication -related harm among older adults. However, published national data on the prevalence of polypharmacy and PIP in Brunei Darussalam are unavailable. The objectives of this study was to determine the prevalence of polypharmacy and PIP among adults aged 65 years and above in Brunei Darussalam using Screening Tool of Older Persons ’ potentially inappropriate Prescriptions (STOPP) version 2 criteria. Materials and Methods: A retrospective cross -sectional study was conducted using data from the Brunei Healthcare Information Management System (Bru -HIMS). A stratified proportional random sample of 2,000 older adults with documented medical encounters in 2016 was selected. Polypharmacy was defined as the concurrent use of five or more medications. PIP was assessed using STOPP version 2 criteria. Descriptive statistics were used to summarise prescribing patterns. Results: Of the 2000 older adults included (mean age 73.0 ± 6.6 years), 1,181 (59.1%) had polypharmacy. Among those with polypharmacy, 1,057 (89.5%) could be assessed using STOPP criteria, and 206 (19.5%) had at least one PIP. The most frequently identified PIPs involved prolonged use of proton pump inhibitors for uncomplicated peptic ulcer disease at full therapeutic dosage for more than eight weeks, where dose reduction, discontinuation, or transition to maintenance therapy (e.g. H2 receptor antagonists) is indicated, prescribing without evidence -based indication, duplication of drug classes, use of ACE inhibitors or angiotensin receptor blockers in patients with hyperkalaemia, and use of first -generation antihistamines. Conclusion: Polypharmacy and PIP are common among older adults in Brunei Darussalam. The findings highlight the need for systematic medication review and deprescribing strategies to optimise pharmacotherapy and improve medication safety in older populations
3.Low-density lipoprotein cholesterol goal attainment and mortality in ischaemic heart disease: a two-year observational study.
Ying Hui MAK ; Fionn CHUA ; Xuan Han KOH ; Vern Hsen TAN ; Zhong Hui LEE ; Audrey LAM ; Kim Leng TONG ; Colin YEO ; Weien CHOW ; Wann Jia LOH
Singapore medical journal 2025;66(3):154-162
INTRODUCTION:
Achieving low-density lipoprotein cholesterol (LDL-C) levels is key to preventing atherosclerotic cardiovascular events. However, many high-risk cardiovascular patients still experience poor LDL-C goal attainment and receive suboptimal lipid-lowering therapy (LLT) prescriptions. Herein, we evaluated LLT prescription patterns, LDL-C goal attainment and cardiovascular mortality among this population group in Singapore.
METHODS:
This prospective observational cohort study included 555 patients with ischaemic heart disease (IHD) admitted to the hospital in 2020. The LLT prescriptions, corresponding LDL-C levels and cardiovascular outcomes were assessed over a 24-month period.
RESULTS:
Most participants were male (82.3%), with 48.5% identified as Chinese. High-intensity statin prescriptions increased from 45.4% at hospital admission to 87.1% at discharge and remained stable at approximately 80% at 6, 12, and 24 months post-discharge. Combination LLT prescriptions increased from 12.3% at discharge to 33.8% by 24 months. Ezetimibe was the most commonly prescribed second-line LLT (40.8%), followed by inclisiran (1.09%) and anti-proprotein convertase subtilisin/kexin type 9 monoclonal antibody therapies (0.87%). Over 24 months, LDL-C goal attainment rates were 22.1% for LDL-C < 1.4 mmol/L and 47.2% for LDL-C < 1.8 mmol/L. Multivariable Cox proportional hazards regression indicated that achieving LDL-C < 1.8 mmol/L goal was associated with a reduction in all-cause mortality at 24 months (hazard ratio 0.53, 95% confidence interval 0.30-0.94, P = 0.030).
CONCLUSION
Treatment gaps in lipid management persist in 80% of the study population, indicating that statin monotherapy alone is insufficient to achieve LDL-C goals. Greater efforts to improve LDL-C goal attainment rates in high-risk cardiovascular patients are imperative.
Humans
;
Male
;
Cholesterol, LDL/blood*
;
Female
;
Myocardial Ischemia/drug therapy*
;
Middle Aged
;
Prospective Studies
;
Aged
;
Singapore/epidemiology*
;
Hydroxymethylglutaryl-CoA Reductase Inhibitors/therapeutic use*
;
Ezetimibe/therapeutic use*
;
Anticholesteremic Agents/therapeutic use*
;
Treatment Outcome
4.Medical and social domains of ageing research in Singapore (2008-2018): a scoping review.
Chen Hee TAM ; Elaine Qiao Ying HO ; Sumali Subhashini HEWAGE ; Shilpa TYAGI ; Gerald Choon Huat KOH
Singapore medical journal 2024;65(1):30-37
INTRODUCTION:
This scoping review examined the number, types and characteristics of journal publications on ageing in Singapore from 2008 to 2018 to determine how ageing research in medical and social domains in Singapore has transformed over time.
METHODS:
Using relevant search terms, articles were extracted from multiple databases and then screened and reviewed for eligibility and inclusion by independent reviewers. Data such as article title, authors, year of publication, name of journal, type of journal, study design and the kind of data used were charted from the included articles for evidence synthesis.
RESULTS:
Since 2008, there has been a steady increase in the number of publications on ageing in medical and social domains in Singapore. In the medical domain, publications on Ophthalmology (22%) made up the largest proportion of the existing medical literature on ageing in Singapore, followed by Physical Functioning (17%), which involved physiological measurements of physical well-being, and Geriatrics (16%). Non-medical publications comprised 38% of all the included publications, with publications on the social aspects of ageing (43%) forming the largest group in this cluster, followed by publications on Prevention (19%) and Healthcare services (18%). The study design was mostly observational (82%), with only 3% of interventional studies.
CONCLUSION
While ageing research had expanded in Singapore in the last decade, it was predominantly discipline specific and observational in design. As ageing issues are complex, with biology intersecting with psychology and sociology, we call for greater interdisciplinary collaboration, the conduct of more interventional studies, as well as more research in understudied and emerging areas.
Humans
;
Singapore
;
Aging
;
Geriatrics
;
Research Design
6.Transmission modes of severe acute respiratory syndrome coronavirus 2 and implications for infection control: a review.
Sean Wei Xiang ONG ; Kristen K COLEMAN ; Po Ying CHIA ; Koh Cheng THOON ; Surinder PADA ; Indumathi VENKATACHALAM ; Dale FISHER ; Yian Kim TAN ; Boon Huan TAN ; Oon Tek NG ; Brenda Sze Peng ANG ; Yee-Sin LEO ; Michelle Su Yen WONG ; Kalisvar MARIMUTHU
Singapore medical journal 2022;63(2):61-67
The complete picture regarding transmission modes of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is unknown. This review summarises the available evidence on its transmission modes, our preliminary research findings and implications for infection control policy, and outlines future research directions. Environmental contamination has been reported in hospital settings occupied by infected patients, and is higher in the first week of illness. Transmission via environmental surfaces or fomites is likely, but decontamination protocols are effective in minimising this risk. The extent of airborne transmission is also unclear. While several studies have detected SARS-CoV-2 ribonucleic acid in air samples, none has isolated viable virus in culture. Transmission likely lies on a spectrum between droplet and airborne transmission, depending on the patient, disease and environmental factors. Singapore's current personal protective equipment and isolation protocols are sufficient to manage this risk.
COVID-19
;
Hospitals
;
Humans
;
Infection Control/methods*
;
Personal Protective Equipment
;
SARS-CoV-2
7.An initial experience with laser haemorrhoidoplasty in addition to mucopexy for symptomatic haemorrhoids.
Ying Xin LOW ; Frederick Hong Xiang KOH ; Winson Jianhong TAN ; Sharmini Su A SIVARAJAH ; Leonard Ming Li HO ; Min Hoe CHEW ; Fung Joon FOO
Annals of the Academy of Medicine, Singapore 2022;51(4):253-254
8.Healthcare cost of patients with multiple chronic diseases in Singapore public primary care setting.
Shu Yun TAN ; Kaiwei Jeremy LEW ; Ying XIE ; Poay Sian Sabrina LEE ; Hui Li KOH ; Yew Yoong DING ; Eng Sing LEE
Annals of the Academy of Medicine, Singapore 2021;50(11):809-817
INTRODUCTION:
The rising prevalence of multiple chronic diseases is an important public health issue as it is associated with increased healthcare utilisation. This paper aimed to explore the annual per capita healthcare cost in primary care for patients with multiple chronic diseases (multimorbidity).
METHODS:
This was a retrospective cohort study conducted in a cluster of public primary care clinics in Singapore. De-identified data from electronic medical records were extracted from July 2015 to June 2017. Only patients with at least 1 chronic disease were included in the study. Basic demographic data and healthcare cost were extracted. A list of 20 chronic diseases was considered for multimorbidity.
RESULTS:
There were 254,377 patients in our study population, of whom 52.8% were female. The prevalence of multimorbidity was 62.4%. The median annual healthcare cost per capita for patients with multimorbidity was about twice the amount compared to those without multimorbidity (SGD683 versus SGD344). The greatest percentage increment in cost was when the number of chronic diseases increased from 2 to 3 (43.0%).
CONCLUSION
Multimorbidity is associated with higher healthcare cost in primary care. Since evidence for the optimal management of multimorbidity is still elusive, prevention or delay in the onset of multimorbidity in the general population is paramount.
Chronic Disease
;
Comorbidity
;
Cross-Sectional Studies
;
Female
;
Health Care Costs
;
Humans
;
Prevalence
;
Primary Health Care
;
Retrospective Studies
;
Singapore/epidemiology*
9.Multimodal prehabilitation before major abdominal surgery: A retrospective study.
Ning Qi PANG ; Stephanie Shengjie HE ; Joel Qi Xuan FOO ; Natalie Hui Ying KOH ; Tin Wei YUEN ; Ming Na LIEW ; John Peter RAMYA ; Yijun LOY ; Glenn Kunnath BONNEY ; Wai Kit CHEONG ; Shridhar Ganpathi IYER ; Ker Kan TAN ; Wan Chin LIM ; Alfred Wei Chieh KOW
Annals of the Academy of Medicine, Singapore 2021;50(12):892-902
INTRODUCTION:
Prehabilitation may benefit older patients undergoing major surgeries. Currently, its efficacy has not been conclusively proven. This is a retrospective review of a multimodal prehabilitation programme.
METHODS:
Patients aged 65 years and above undergoing major abdominal surgery between May 2015 and December 2019 in the National University Hospital were included in our institutional programme that incorporated aspects of multimodal prehabilitation and Enhanced Recovery After Surgery concepts as 1 holistic perioperative pathway to deal with issues specific to older patients. Physical therapy, nutritional advice and psychosocial support were provided as part of prehabilitation.
RESULTS:
There were 335 patients in the prehabilitation cohort and 256 patients whose records were reviewed as control. No difference in postoperative length of stay (
CONCLUSION
The current study found no differences in traditional surgical outcome measures with and without prehabilitation. An increase in patient mobility in the immediate postoperative period was noted with prehabilitation, as well as an association between prehabilitation and increased adherence to postoperative adjuvant therapy. Larger prospective studies will be needed to validate the findings of this retrospective review.
Humans
;
Postoperative Complications/prevention & control*
;
Preoperative Care
;
Preoperative Exercise
;
Prospective Studies
;
Retrospective Studies
10.Predictors of acute neurological complication following tetralogy of Fallot operation in Serdang Hospital, Malaysia
Yap Ming Teck ; Putri Yubbu ; Yong Shao Wei ; Hing Wee Ven ; Ong Ying Seang ; Navin Kumar Devaraj ; Ani Suraya Abdul Ghan ; Koh Ghee Tiong ; Hamdan Leman,
The Medical Journal of Malaysia 2020;75(5):495-501
Background: The long waiting time for Tetralogy of Fallot
(TOF) operation may potentially increase the risk of hypoxic
insult. Therefore, the objective of this study is to determine
the frequency of acute neurological complications following
primary TOF repair and to identify the peri-operative risk
factors and predictors for the neurological sequelae.
Methods: A retrospective review of the medical and surgical
notes of 68 patients who underwent TOF repair in Hospital
Serdang, from January 2013 to December 2017 was done.
Univariate and multivariate analyses of demographics and
perioperative clinical data were performed to determine the
risk for the development of acute neurological
complications (ANC) among these patients.
Results: ANC was reported in 13 cases (19.1%) with delirium
being the most common manifestation (10/68, 14.7%),
followed by seizures in 4 (5.9%) and abnormal movements in
two patients (2.9%). Univariate analyses showed that the
presence of right ventricular (RV) dysfunction, prolonged
duration of inotropic support (≥7 days), prolonged duration
of mechanical ventilation (≥7 days), longer length of ICU
stays (≥7 days), and longer length of hospital stay (≥14
days), were significantly associated with the presence of
ANCs (p<0.05). However, multivariate analyses did not show
any significant association between these variables and the
development of ANC (p>0.05). The predictors for the
development of postoperative delirium were pre-operative
oxygen saturation less than 75% (Odds Ratio, OR=16.90,
95% Confidence Interval, 95%CI:1.36, 209.71) and duration of
ventilation of more than 7 days (OR=13.20, 95%CI: 1.20,
144.98).
Conclusion: ANC following TOF repair were significantly
higher in patients with RV dysfunction, in those who
required a longer duration of inotropic support, mechanical
ventilation, ICU and hospital stay. Low pre-operative oxygen
saturation and prolonged mechanical ventilation
requirement were predictors for delirium which was the
commonest neurological complications observed in this
study. Hence, routine screening for delirium using an
objective assessment tool should be performed on these
high-risk patients to enable accurate diagnosis and early
intervention to improve the overall outcome of TOF surgery
in this country


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