Displaying publications 1 - 20 of 149 in total

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  1. Srinivas P, Wong KS, Chia YC, Poi PJ, Ebrahim S
    PMID: 10772571
    The main objective of this study was to survey the prevalence of hypertension in Malaysians aged 55 years and above who responded to a public health screening campaign in Kuala Langat district, Selangor, Malaysia. The relationship between the detection, treatment and control in the study population was also examined. An epidemiological survey of the elderly was conducted in Kuala Langat, a rural district in Malaysia for a consecutive period of six weeks. The survey was conducted using a standardized questionnaire and interview by trained research assistants. The medical students and nurses were trained on the correct protocol of measuring blood pressure based on the recommendations of the British Hypertension Society. Newly detected persons with blood pressure readings 160/95 mmHg and above, were given a green card to return to the nearest health center for a further 2 visits to check his/her blood pressure. A total of 1,392 people with a mean age of 65 years and comprising of 53.1% males and 46.9% females responded to the health survey. Based on the history 335 (24.1%) of the respondents were known hypertensives and 82.1% of this hypertensive group were on regular treatment. However good control of hypertension was achieved only in 161 (48.1%) of them. Newly detected hypertension was found in 204 (14.6%) of the respondents. The overall prevalence of hypertension in our sample of respondents was 25.6%. There was no significant difference between the sexes and the races in terms of their detection, treatment and control. However there was a significant difference between the persons aged less than 65 years of age and those older than 65 years. There was a large proportion of previously known hypertensives among the survey population. Of those detected, not all were on regular medications and the majority on medications were not well controlled. Education of the public through intensive public health campaigns is vital to improve their knowledge on hypertension and the need for effective control. More community studies are needed to formulate better methods in the detection, treatment and control of hypertension.
  2. Forsyth DR, Chia YC
    Med J Malaysia, 2009 Mar;64(1):46-50.
    PMID: 19852321
    As Malaysia ages its health and social care systems will have to adapt to a changing pattern of disease and dependency. Improved public health measures extend life expectancy at the relative expense of increased prevalence of currently incurable conditions such as dementia and Parkinson's disease. In this article we discuss how these demographic changes will impact and suggest possible means of coping with the altered epidemiology of disease and disability. Malaysia will need to swiftly develop sufficient expertise in acute Geriatric Medicine, rehabilitation of older people; the management of long-term conditions in older people with multiple complex problems within Primary Care; as well as an infrastructure for home and institutional care.
  3. Kong NC, Chia YC, Khalid BA, Juwita S, Samiah Yasmin AK, Yap LY, et al.
    Med J Malaysia, 2006 Oct;61(4):457-65.
    PMID: 17243524 MyJurnal
    Microalbuminuria is the earliest indicator of diabetic kidney disease and generalised vascular endothelial dysfunction. The Microalbuminuria Prevalence (MAP) Study was carried out to assess the prevalence of macroalbuminuria, microalbuminuria and normoalbuminuria in Asian hypertensive patients with type 2 diabetes on usual care. This paper presents a subanalysis of data from patients in Malaysia. In 733 analysed patients, the prevalence of macroalbuminuria and microalbuminuria was 15.7% and 39.7%, respectively. The high prevalence of diabetic nephropathy in these high-risk patients is a cause for concern, and the Malaysian Health Care system should be prepared for a pandemic of end-stage renal disease due to diabetic nephropathy.

    Study site: six medical centres in Kuala Lumpur, Kota Bharu,
    Kuching and Kota Kinabalu
  4. Srinivas P, Chia YC, Poi PJH, Ebrahim S
    Med J Malaysia, 1999 Mar;54(1):11-21.
    PMID: 10971999
    An epidemiological survey was conducted among 1,414 healthy ambulatory elderly persons aged 55 years and above in the Kuala Langat district, Selangor. The relationship between peak expiratory flow rate (PEFR), demographic variables, socioeconomic status, smoking, alcohol use and respiratory symptoms were examined. The peak expiratory flow declined with age and were lower in women of all ages. Smoking had a modest effect on PEFR in men but not on PEFR in women. The combination of respiratory symptoms of cough, phlegm and wheeze were related to lower PEFR values. Prediction equations are presented derived from the population sample which may be of assistance in assessing observed to expected ratios among elderly people in Malaysia.
  5. Hanafi NS, Chia YC
    Med J Malaysia, 2002 Dec;57 Suppl E:74-7.
    PMID: 12733197
    The teaching of clinical communication skills to undergraduate medical students in the Faculty of Medicine, University of Malaya is described. It is a continuous process throughout the five-year medical curriculum which is divided into Phases I, II and III. Students are introduced to communication skills early in Phase I through an interactive session as well as a workshop on general communication skills. In Phase II, small-group two-day workshops cover the basic principles of clinical communication skills using videotapes, group discussion and role-plays. Direct contact between students and patients in actual clinical setting begin in Phase IIIA. Communication skills teaching with feedback training is carried out by videotaping the consultations. In Phase IIIB the two-way mirror is utilized as well as having workshops on certain difficult areas such as 'breaking bad news' and 'taking a sexual history'. Formal assessment is done by evaluating the behavior, language and actual interview content.
  6. Mimi O, Teng CL, Chia YC
    Med J Malaysia, 2003 Oct;58(4):533-8.
    PMID: 15190629
    This study was undertaken to clinically estimate the prevalence of diabetic peripheral neuropathy amongst patients attending an outpatient clinic and to evaluate their risk factors for developing peripheral neuropathy. It was a cross-sectional study of 134 diabetes mellitus patients who attended the Primary Care Clinic, University Hospital, Kuala Lumpur. The patients were interviewed for their demographic data, past and present medical/surgical history, social history, personal habits and symptoms of peripheral neuropathy. Foot examination and clinical neurological tests were conducted and the presence of peripheral neuropathy was assessed. The main outcome measures were the Neuropathy Symptom Score and the Neuropathy Disability Score. The prevalence of diabetic peripheral neuropathy was found to be 50.7%. Peripheral neuropathy was related to the age of the patient and the duration of diabetes but did not seem to be significantly related to diabetic control. To conclude, there was a high prevalence of peripheral neuropathy amongst the diabetics in this study. These patients developed peripheral neuropathy at a younger age and shorter duration of diabetes compared to a similar study that was done in the UK.
    Study site: Primary care clinc, University Malaya Medical Centre (UMMC), Kuala Lumpur, Malaysia
  7. Neblett RS, Chia YC, Abdullah N, Ablah E
    Med J Malaysia, 2019 12;74(6):483-491.
    PMID: 31929473
    INTRODUCTION: Ethnic differences may influence diabetes selfcare practices and glycaemic control among people with type 2 diabetes mellitus. This qualitative study explored goals, beliefs about treatment effectiveness, knowledge, and barriers to and facilitators for diabetes self-care among the three main ethnic groups in Malaysia.

    METHODS: Patient focus group discussions were conducted in three different ethnic groups: Malays, Chinese, and Indians. Participants were recruited from the primary-care clinic of a university medical centre located in an urban area. Focus group discussions were audio-recorded, transcribed, and analysed using a thematic approach.

    RESULTS: A total of 31 patients participated in the study: Malays (n=12), Indians (n=10), and Chinese (n=9). There were three sessions for each ethnic group. Reported goals primarily related to quality of life and glycaemic control. Participants expressed the belief that the combination of diet, exercise, and medications is effective for controlling diabetes. Groups described their obtaining information external to a healthcare system and reported a need for more specific, practical counselling from health professionals on diet, exercise, and medications. Barriers to and facilitators for diabetes self-care practices were categorised into three major themes: having discipline, social habits, and "other" themes.

    CONCLUSION: Emerging themes were similar across the ethnic groups and included quality-of-life goals, confidence in combination treatment, common use of complementary and alternative medicine, need for further counselling, and the challenge regarding self-discipline.
  8. Lim LL, Lau ESH, Kong APS, Fu AWC, Lau V, Jia W, et al.
    Lancet Reg Health West Pac, 2023 Mar;32:100663.
    PMID: 36785858 DOI: 10.1016/j.lanwpc.2022.100663
    BACKGROUND: In Asia, diabetes-associated death due to cardiorenal diseases were 2-3 times higher in women than men which might be due to gender disparity in quality of care and health habits.

    METHODS: Adults with type 2 diabetes (T2D) from 11 Asian countries/areas were assessed using the same protocol (2007-2015). We compared treatment target attainment (HbA1c < 7%, blood pressure [BP] < 130/80 mmHg, risk-based LDL-cholesterol, lack of central obesity [waist circumference <90 cm in men or <80 cm in women), use of cardiorenal-protective drugs (renin-angiotensin system [RAS] inhibitors, statins), and self-reported health habits including self-monitoring blood glucose (SMBG) by gender. Analyses were stratified by countries/areas, age of natural menopause (<50 vs. ≥50 years), and comorbidities (atherosclerotic cardiovascular disease [ASCVD], heart failure, kidney impairment [eGFR < 60 mL/min/1.73 m2]).

    FINDINGS: Among 106,376 patients (53.2% men; median (interquartile range) diabetes duration: 6.0 (2.0-12.0) years; mean ± SD HbA1c 8.0 ± 1.9%; 27% insulin-treated), women were older and less likely to receive college education than men (28.9% vs. 48.8%). Women were less likely to smoke/drink alcohol and were physically less active than men. Women had lower BP (<130/80 mmHg: 29.4% vs. 25.7%), less general obesity (54.8% vs. 57.8%) but more central obesity than men (77.5% vs. 57.3%). Women were less likely to have ASCVD (12.8% vs. 17.0%) or heart failure (1.3% vs. 2.3%), but more likely to have kidney impairment (22.3% vs. 17.6%) and any-site cancer than men (2.5% vs. 1.6%). In most countries/areas, more men attained HbA1c <7% and risk-based LDL-cholesterol level than women. After adjusting for potential confounders including countries and centres, men had 1.63 odds ratio (95% CI 1.51, 1.74) of attaining ≥3 treatment targets than women.

    INTERPRETATION: Asian women with T2D had worse quality of care than men especially in middle-income countries/areas, calling for targeted implementation programs to close these care gaps.

    SPONSOR: Asia Diabetes Foundation.

    FUNDING: Nil.

  9. Kasim SS, Ibrahim N, Malek S, Ibrahim KS, Aziz MF, Song C, et al.
    Lancet Reg Health West Pac, 2023 Jun;35:100742.
    PMID: 37424687 DOI: 10.1016/j.lanwpc.2023.100742
    BACKGROUND: Cardiovascular risk prediction models incorporate myriad CVD risk factors. Current prediction models are developed from non-Asian populations, and their utility in other parts of the world is unknown. We validated and compared the performance of CVD risk prediction models in an Asian population.

    METHODS: Four validation groups were extracted from a longitudinal community-based study dataset of 12,573 participants aged ≥18 years to validate the Framingham Risk Score (FRS), Systematic COronary Risk Evaluation 2 (SCORE2), Revised Pooled Cohort Equations (RPCE), and World Health Organization cardiovascular disease (WHO CVD) models. Two measures of validation are examined: discrimination and calibration. Outcome of interest was 10-year risk of CVD events (fatal and non-fatal). SCORE2 and RPCE performances were compared to SCORE and PCE, respectively.

    FINDINGS: FRS (AUC = 0.750) and RPCE (AUC = 0.752) showed good discrimination in CVD risk prediction. Although FRS and RPCE have poor calibration, FRS demonstrates smaller discordance for FRS vs. RPCE (298% vs. 733% in men, 146% vs. 391% in women). Other models had reasonable discrimination (AUC = 0.706-0.732). Only SCORE2-Low, -Moderate and -High (aged <50) had good calibration (X2 goodness-of-fit, P-value = 0.514, 0.189, 0.129, respectively). SCORE2 and RPCE showed improvements compared to SCORE (AUC = 0.755 vs. 0.747, P-value <0.001) and PCE (AUC = 0.752 vs. 0.546, P-value <0.001), respectively. Almost all risk models overestimated 10-year CVD risk by 3%-1430%.

    INTERPRETATION: In Malaysians, RPCE are evaluated be the most clinically useful to predict CVD risk. Additionally, SCORE2 and RPCE outperformed SCORE and PCE, respectively.

    FUNDING: This work was supported by the Malaysian Ministry of Science, Technology, and Innovation (MOSTI) (Grant No: TDF03211036).

  10. Liew SM, Abdullah A, Abdullah N, Chia YC
    Australas Med J, 2013;6(1):67-9.
    PMID: 23423184 DOI: 10.4066/AMJ.2013.1629
    Cardiovascular disease (CVD) remains the leading cause of morbidity and mortality worldwide. Despite efforts to tackle CVD, its prevalence continues to escalate in almost every country. The problem requires an exploration of novel ways to uncover solutions. Health innovations that embrace new knowledge and technology possess the potential to revolutionize the management of CVD. Using findings from published studies on CVD, researchers generated innovations in the areas of global risk assessment, home and remote monitoring and bedside testing. The use of pharmacogenetics and methods to support lifestyle changes represent other potential topics for innovations. Gaps in existing knowledge and practice of CVD provide opportunities for the development of new ideas, practices and technology. However, healthcare professionals need to be cognisant of the limitations of health innovations and advocate for safeguarding patients' wellbeing.
  11. Chia YC, Anjum CE, Yee HR, Kenisi Y, Chan MKS, Wong MBF, et al.
    Stem Cells Int, 2020;2020:8889061.
    PMID: 32952573 DOI: 10.1155/2020/8889061
    Blood-brain barrier (BBB) is a term describing the highly selective barrier formed by the endothelial cells (ECs) of the central nervous system (CNS) homeostasis by restricting movement across the BBB. An intact BBB is critical for normal brain functions as it maintains brain homeostasis, modulates immune cell transport, and provides protection against pathogens and other foreign substances. However, it also prevents drugs from entering the CNS to treat neurodegenerative diseases. Stem cells, on the other hand, have been reported to bypass the BBB and successfully home to their target in the brain and initiate repair, making them a promising approach in cellular therapy, especially those related to neurodegenerative disease. This review article discusses the mechanism behind the successful homing of stem cells to the brain, their potential role as a drug delivery vehicle, and their applications in neurodegenerative diseases.
  12. Chia YC, Yeoh ES, Ng CJ, Khoo EM, Chua CT
    Singapore Med J, 2009 May;50(5):500-5.
    PMID: 19495520
    INTRODUCTION: Calcium channel blockers are well established modalities for the treatment of hypertension. However, in spite of the availability of many efficacious agents, hypertension control continues to be poor. One reason is poor tolerability due to adverse events. Racial differences also exist. Lercanidipine, a third-generation calcium channel blocker, is associated with better tolerability. However, it has not been studied in the Asian population. This study examines its efficacy and tolerability in Asian subjects of different ethnicities.
    METHODS: This was an eight-week open label study of adults with mild to moderate hypertension. Blood pressure (BP), pulse rate, self-administered symptom check and laboratory evaluations were done at baseline. Patients were prescribed 10 mg lercanidipine, with up-titration to 20 mg if BP was not controlled at Week 4. Baseline evaluations were repeated at Week 8. Adverse events were also enumerated.
    RESULTS: 27 patients (mean age 53.4 +/- 12.1 years) completed the study. The baseline systolic BP (SBP), diastolic BP (DBP) and heart rate was 159 +/- 12.2, 96.6 +/- 7.7 mmHg and 71 +/- 13/min, respectively. Three racial groups were represented. SBP and DBP decreased significantly after four weeks of therapy. A further reduction to 139 +/- 14.3 and 88 +/- 9.8 (p-value is less than 0.0001) was seen in Week 8. The absolute SBP and DBP reduction was 20.5 mmHg (95 percent confidence interval [CI] 16.5-24.5, p-value is less than 0.0001) and 9.3 mmHg (95 percent CI 6.2-12.5, p-value is less than 0.0001), respectively. All adverse symptoms, except for palpitations, were reduced at the end of the study.
    CONCLUSION: Lercanidipine is efficacious and well tolerated in Asians of different ethnicities. Its BP lowering effects and tolerability in Asians appear to be similar to other studies on Caucasians and other calcium channel blockers.
  13. Wong SL, Lee PY, Ng CJ, Hanafi NS, Chia YC, Lai PS, et al.
    Singapore Med J, 2015 Sep;56(9):518-22.
    PMID: 26451055 DOI: 10.11622/smedj.2015137
    INTRODUCTION: The aim of this study was to determine the extent to which primary care doctors assessed patients newly diagnosed with hypertension for the risk factors of cardiovascular disease (CVD) during the patients' first clinic visit for hypertension. The study also aimed to examine the trend of assessment for CVD risk factors over a 15-year period.
    METHODS: This retrospective study was conducted between January and May 2012. Data was extracted from the paper-based medical records of patients with hypertension using a 1:4 systematic random sampling method. Data collected included CVD risk factors and a history of target organ damage (TOD), which were identified during the patient's first visit to the primary care doctor for hypertension, as well as the results of the physical examinations and investigations performed during the same visit.
    RESULTS: A total of 1,060 medical records were reviewed. We found that assessment of CVD risk factors during the first clinic visit for hypertension was poor (5.4%-40.8%). Assessments for a history of TOD were found in only 5.8%-11.8% of the records, and documented physical examinations and investigations for the assessment of TOD and secondary hypertension ranged from 0.1%-63.3%. Over time, there was a decreasing trend in the percentage of documented physical examinations performed, but an increasing trend in the percentage of investigations ordered.
    CONCLUSION: There was poor assessment of the patients' CVD risk factors, secondary causes of hypertension and TOD at their first clinic visit for hypertension. The trends observed in the assessment suggest an over-reliance on investigations over clinical examinations.
  14. Chia YC
    Singapore Med J, 2011 Feb;52(2):116-23.
    PMID: 21373738
    Cardiovascular Disease (CVD) is the leading cause of death in both developed and developing countries. While it is relatively easy to identify those who are obviously at high risk and those at the lowest risk for CVD, it is often the large group of individuals with what appears to be modestly abnormal risk factors who contributes most to the burden of CVD. This is where estimation of CVD risk is necessary. Many tools for risk assessment have been devised. All these risk scores have their own inherent advantages and disadvantages. Furthermore, they may also not be directly applicable to a local population. Ideally, each country should have its own risk score that takes into account other factors as well. In the interim, it is worthwhile to be familiar with one of these scores, select one that is most appropriate for your patient and discuss treatment options based on the estimated risk.
  15. Foong HB, Yassim M, Chia YC, Kang BH
    Singapore Med J, 1992 Dec;33(6):597-9.
    PMID: 1488669
    A study to determine the sensitivity and specificity of the Directogen Group A Streptococcal Test was carried out in a primary care clinic in University Hospital, Kuala Lumpur. The study also looked at the prevalence of streptococcal pharyngitis in the clinic. We found that the rapid test has a sensitivity of 90.9% and a specificity of 90.7%. Viral pharyngitis is the commonest form (63%) of pharyngitis followed by Group A Beta haemolytic streptococcal pharyngitis (14.2%). The presence of exudates, tonsillar enlargement and the presence of tender cervical lymph nodes have a significantly higher association with streptococcal pharyngitis.
    Study site: Primary care clinic, University Malaya Medical Centre (UMMC), Kuala Lumpur, Malaysia
  16. Castillo-Carandang NT, Buenaventura RD, Chia YC, Do Van D, Lee C, Duong NL, et al.
    Risk Manag Healthc Policy, 2020;13:803-819.
    PMID: 32765135 DOI: 10.2147/RMHP.S256165
    Introduction: Noncommunicable diseases (NCDs) are the leading cause of morbidity and mortality in the Association of Southeast Asian Nations (ASEAN) member states. Progress has been slow despite the World Health Organization action plan for the prevention and control of NCDs in the region. This paper presents recommendations focused on practical strategies for optimizing NCD management in the ASEAN region.

    Methods: A multidisciplinary group of experts from six ASEAN member states convened for two face-to-face meetings to discuss barriers and possible recommendations for optimizing NCD management, focused on cardiovascular diseases and mental disorders, in the region. Multiple approaches, ie, analysis of insights from the meetings and a review of existing literature on NCD programs in the ASEAN region were followed. The proposed recommendations were also based on selected successful interventions in ASEAN member states, thus providing actionable strategies.

    Results: The gaps identified in NCD management for cardiovascular diseases and mental disorders in the ASEAN region were classified into gaps relating to policies and to clinical and public health practice. The proposed solutions addressing policy gaps include fostering multisectoral public-private partnerships, employing "whole-of-government" and "whole-of-society" approaches and promoting "health-in-all policies approach" to manage issues with financing, accessibility, efficiency and quality of health services. Whereas proposed solutions to bridge clinical and public health practice gaps entail strengthening primary care services, building the capacity of trained healthcare workers and employing collaborative care for holistic management of patients.

    Conclusion: The scale of premature and preventable deaths from NCDs in the ASEAN region remains a serious public health concern and requires a "whole-of-system approach". The interventions proposed in this paper build on regional collaborations and knowledge sharing to help develop a concerted and targeted response to NCDs.

  17. Ching SM, Pang YK, Price D, Cheong AT, Lee PY, Irmi I, et al.
    Respirology, 2014 Jul;19(5):689-93.
    PMID: 24708063 DOI: 10.1111/resp.12291
    BACKGROUND AND OBJECTIVE: Early diagnosis of chronic obstructive pulmonary disease (COPD) in primary care settings is difficult to achieve chiefly due to lack of availability of spirometry. This study estimated the prevalence of airflow limitation among chronic smokers using a handheld spirometer in this setting.
    METHODS: This is a cross-sectional study performed on consecutive patients who were ≥40 years old with ≥10 pack-years smoking history. Face-to-face interviews were carried out to obtain demographic data and relevant information. Handheld spirometry was performed according to a standard protocol using the COPd-6 device (Model 4000, Vitalograph, Ennis, Ireland) in addition to standard spirometry. Airflow limitation was defined as ratio of forced expiratory volume in 1 s (FEV1 )/forced expiratory volume in 6 s <0.75 (COPd-6) or FEV1 /forced vital capacity <0.7. Multiple logistic regression analyses were used to determine predictors of airflow limitation.
    RESULTS: A total of 416 patients were recruited with mean age of 53 years old. The prevalence of airflow limitation was 10.6% (n = 44) with COPd-6 versus 6% as gauged using standard spirometry. Risk factors for airflow limitation were age >65 years (odds ratio (OR) 3.732 95% confidence interval (CI): 1.100-1.280), a history of 'bad health' (OR 2.524, 95% CI: 1.037-6.142) and low to normal body mass index (OR 2.914, 95% CI: 1.191-7.190).
    CONCLUSIONS: In a primary care setting, handheld spirometry (COPd-6) found a prevalence of airflow limitation of ∼10% in smokers. Patients were older, not overweight and had an ill-defined history of health problems.
    KEYWORDS: Malaysia; chronic obstructive pulmonary disease; prevalence; primary care; smoke
    Study site: Public primary health‐care clinic (Klinik Kesihatan), Sepang District, Selangor, Malaysia
  18. Jiwa M, Othman S, Hanafi NS, Ng CJ, Khoo EM, Chia YC
    Qual Prim Care, 2012;20(5):317-20.
    PMID: 23113999
    Malaysia has achieved reasonable health outcomes even though the country spends a modest amount of Gross Domestic Product on healthcare. However, the country is now experiencing a rising incidence of both infectious diseases and chronic lifestyle conditions that reflect growing wealth in a vibrant and successful economy. With an eye on an ageing population, reform of the health sector is a government priority. As in other many parts of the world, general practitioners are the first healthcare professional consulted by patients. The Malaysian health system is served by public and private care providers. The integration of the two sectors is a key target for reform. However, the future health of the nation will depend on leadership in the primary care sector. This leadership will need to be informed by research to integrate care providers, empower patients, bridge cultural gaps and ensure equitable access to scarce health resources.
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