Displaying publications 1 - 20 of 42 in total

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  1. Kow FP, Adlina B, Sivasangari S, Punithavathi N, Ng KK, Ang AH, et al.
    Med J Malaysia, 2018 08;73(4):233-238.
    PMID: 30121686 MyJurnal
    INTRODUCTION: As pharmacological treatment of hypertension has become a burden worldwide, the study looked into nonpharmacological ways of reducing blood pressure. The objective was to determine if music guided, slow and deep breathing will reduce the blood pressure among patients with hypertension in eight weeks.

    METHODS: A participant blinded, multi-centre, randomised controlled trial was conducted in which the participants in the intervention group (IG) practiced deep breathing exercise guided by sound cues and those in the control group (CG) listened to the music. The primary end point was reduction in blood pressure at eight weeks.

    RESULTS: 87 patients, 46 males and 41 females with mean age of 61.1 years were recruited and 93.1% of them successfully completed the study. There was significant reduction in systolic and diastolic Blood Pressure from baseline by 8 weeks in both groups. The reduction in Mean systolic blood pressure (SBP) in the control arm was 10.5mmHg compared to 8.3mmHg (p<0.001) in intervention group. Diastolic blood pressure (DBP) reduction in control and intervention groups were 5.2 mmHg (p<0.001) and 5.6 mmHg (p<0.001) respectively. The absolute difference in SBP reduction from baseline in IG & CG was -2.2 (95%CI: -7.8 to 3.5) and DBP was -0.4 (95%CI: -2.9 to 3.6). However, blood pressure reduction between the two groups was not significant.

    CONCLUSIONS: Both listening to music and deep breathing exercise were associated with a clinically significant reduction in SBP and DBP. However, deep breathing exercise did not augment the benefit of music in reducing BP.

  2. Ch'ng CC, Ong LM, Beh KKM, Md Yusuf WS, Chew TF, Lee ML, et al.
    Nephrology (Carlton), 2020 Aug;25(8):644-651.
    PMID: 31900988 DOI: 10.1111/nep.13689
    AIM: Many patients, especially the elderly, who require renal replacement therapies (RRT) have delayed or rejected dialysis for various reasons. Current dialysis guidelines may not be relevant for the elderly or frail patients. We aim to determine survival advantage of initiating dialysis in patients deemed to require RRT.

    METHODS: This was an observational cohort on incident end-stage kidney disease (ESKD) patients from January 1, 2007 to December 31, 2008. The primary outcome was all-cause mortality. Patients contributed person-time from the date of ESKD diagnosis until death, transplant or end of study on December 31, 2014, whichever occurred first. An extended Cox regression model with time-varying exposure to dialysis was used to account for immortal time bias.

    RESULTS: Of 3990 incident ESKD patients included, 70.2% patients initiated dialysis; 78.8% with haemodialysis (HD) while the remaining 21.2% with peritoneal dialysis (PD). Dialysis reduced hazard of death in both elderly and non-elderly patients even after controlling for comorbidities (hazard ratio [HR] 0.58, 95% confidence interval [CI] 0.50, 0.68 and HR 0.76, 95% CI 0.69, 0.85, respectively). HD was protective in both the elderly and non-elderly (HR 0.53, 95% CI 0.45, 0.63 and HR 0.71, 95% CI 0.64, 0.80, respectively). PD significantly reduced risk of death compared to no dialysis in the elderly but not in the non-elderly.

    CONCLUSION: Dialysis improved survival in all incident ESKD patients. The findings suggested a larger protection offered by HD. Although improvement in survival from initiating dialysis was large, its true benefit should take overall quality of life into account. SUMMARY AT A GLANCE This observational study showed that initiation of dialysis improves the survival of end-stage kidney disease (ESKD) patients of all age groups, but the quality of life is an important aspect that has not been explored.

  3. Danial M, Hassali MA, Ong LM, Khan AH
    BMC Pharmacol Toxicol, 2018 Aug 29;19(1):52.
    PMID: 30157959 DOI: 10.1186/s40360-018-0243-0
    BACKGROUND: Accurate identification and routine preventive practices are crucial steps in lessening the incidence of medications and patients related adverse drug reactions (ADRs).

    METHODS: Three years retrospective study was conducted among chronic kidney disease (CKD) patients at multi-wards in a tertiary healthcare center. Data collected included demographic characteristics, physical examination results, comorbid conditions, laboratory tests and medications taken. Only medication prescribed during the hospital stay were considered in this study.

    RESULTS: From this study only one ADR incident was definitely preventable and majority of other ADRs (88.3%) were possibly preventable. Type of renal replacement therapy (p = 0.023) and stages of renal function (p = 0.002) were significantly associated with survivability of the hospitalized CKD patients after ADRs. Highest percentage of mortality based on categories were 50-59 years (20.0%), male (16.3%), Indian ethnicity (23.7%), obese (15.0%), smoking (17.1%), consumes alcohol (17.4%), conservative management of renal disease (19.5%) and renal function of
  4. Neelamegam M, Looi I, Cheah WK, Narayanan P, Hamid AM, Ong LM
    Prev Med, 2013;57 Suppl:S77-9.
    PMID: 23295169 DOI: 10.1016/j.ypmed.2012.12.022
    This community based incidence study aims to report the stroke incidence in the south-west region of the Penang Island.
  5. Loh GOK, Wong EYL, Tan YTF, Ong LM, Ng RS, Wee HC, et al.
    PMID: 33429127 DOI: 10.1016/j.jchromb.2020.122517
    A simple, fast and sensitive LC-MS/MS method was developed to quantify terazosin in human plasma. The mobile phase consisted of acetonitrile-0.1% (v/v) formic acid (70:30, v/v). Prazosin was used as internal standard (IS). As deproteinization agent, acetonitrile produced a clean sample. A higher response intensity with more symmetrical peak was obtained using Agilent Poroshell 120 EC-C18 - Fast LC column (100 × 2.1mmID, 2.7 μm) compared with Kinetex XB-C18 (100 × 2.1 mm, 2.6 µm) column. The response of terazosin and IS were approximately two times in citrate phosphate dextrose (CPD) plasma compared with dipotassium ethylenediaminetetraacetic acid (K2EDTA) plasma. Plasma calibration curve was linear from 1.0 to 100.0 ng/mL, with coefficient of determination r2 ≥ 0.99. The within-run and between-run precision values (CV, %) were <5.2% and <7.8%, while accuracy values were 102.8-112.7% and 103.4-112.2%. The extended run accuracy was 98.6-102.8% and precision (CV, %) 4.3-10.4%. The recovery of analyte was >98% and IS >94%. Terazosin in plasma kept at benchtop was stable for 24 h, in autosampler tray for 48 h, in instrumentation room for 48 h, for 7 freeze-thaw cycles and in freezer for 140 days. Terazosin and IS stock standard solutions were stable for 140 days at room temperature and in the chiller. The high throughput method was successfully utilized to measure 935 samples in a bioequivalence study of terazosin.
  6. Ong LM, Ch'ng CC, Wee HC, Supramaniam P, Zainal H, Goh BL, et al.
    Perit Dial Int, 2016 05 04;37(1):35-43.
    PMID: 27147287 DOI: 10.3747/pdi.2015.00141
    ♦ BACKGROUND: Peritonitis is one of the most common complications of peritoneal dialysis (PD). Understanding the risk factors of peritonitis in a multi-racial Asian population may help to improve outcomes on PD. ♦ METHODS: We conducted a prospective observational study to identify risk factors for PD-related peritonitis over a 1-year period in 15 adult PD centers. All peritonitis episodes were independently adjudicated. ♦ RESULTS: A total of 1,603 participants with a mean age of 51.6 years comprising 52.7% females, 62.6% ethnic Malays, 27.0% Chinese, and 8.1% Indians were recruited. The overall peritonitis rate was 1 episode per 44.0 patient-months with 354 episodes recorded in 282 (17.6%) patients over 15,588 patient-months. Significant risk factors of peritonitis were severe obesity (incidence-rate ratio [IRR] 3.32, 95% confidence interval [CI]: 1.30, 8.45), hypoalbuminemia (IRR 1.61, 95% CI: 1.06, 2.46), Staphylococcus aureus nasal carriage (IRR 2.26, 95% CI: 1.46, 3.50), and use of Fresenius system (Fresenius Medical Care North America, Waltham, MA, USA) (IRR 2.49, 95% CI: 1.27, 4.89). The risk of peritonitis was lower in those on automated PD compared with standard PD (IRR 0.43, 95% CI: 0.25, 0.74), and in centers with a patient-staff ratio of 15 to 29.9 (IRR 0.67, 95% CI: 0.49, 0.90) and ≥ 30 (IRR 0.52, 95% CI: 0.34, 0.80). Prevalent patients and exit-site care with topical antibiotics were also protective against peritonitis. Peritonitis rates varied between racial groups. The IRRs of overall peritonitis and gram-positive peritonitis in Chinese versus other racial groups were 0.65 (95% CI: 0.46, 0.90) and 0.47 (95% CI: 0.24, 0.91), respectively. ♦ CONCLUSIONS: Multiple patient, center, and PD-system factors influence the risk of peritonitis. In the Asian population, there are racial differences in the risk of peritonitis.
  7. Goh BL, Ong LM, Sivanandam S, Lim TO, Morad Z, Biogeneric EPO Study Group
    Nephrology (Carlton), 2007 Oct;12(5):431-6.
    PMID: 17803464
    Treatment of renal anaemia with epoetin is well established. However, epoetin is expensive. Biogeneric epoetin with proven efficacy would reduce cost and improve access to therapy. We conducted this first ever comparative study of a biogeneric and the original product.
  8. Ong LM, Narayanan P, Goh HK, Manocha AB, Ghazali A, Omar M, et al.
    Nephrology (Carlton), 2013 Mar;18(3):194-200.
    PMID: 23311404 DOI: 10.1111/nep.12029
    The objective of the study was to compare the efficacy and safety of oral paricalcitol with oral calcitriol for treating secondary hyperparathyroidism.
  9. Ong LM, Hooi LS, Lim TO, Goh BL, Ahmad G, Ghazalli R, et al.
    Nephrology (Carlton), 2005 Oct;10(5):504-10.
    PMID: 16221103 DOI: 10.1111/j.1440-1797.2005.00444.x
    BACKGROUND: The aim of the present study was to evaluate the efficacy of mycophenolate mofetil in the induction therapy of proliferative lupus nephritis.
    METHODS: Forty-four patients from eight centres with newly diagnosed lupus nephritis World Health Organization class III or IV were randomly assigned to either mycophenolate mofetil (MMF) 2 g/day for 6 months or intravenous cyclophosphamide (IVC) 0.75-1 g/m(2) monthly for 6 months in addition to corticosteroids.
    RESULTS: Remission occurred in 13 out of 25 patients (52%) in the IVC group and 11 out of 19 patients (58%) in the MMF group (P = 0.70). There were 12% in the IVC group and 26% in the MMF group that achieved complete remission (P = 0.22). Improvements in haemoglobin, the erythrocyte sedimentation rate, serum albumin, serum complement, proteinuria, urinary activity, renal function and the Systemic Lupus Erythematosus Disease Activity Index score were similar in both groups. Twenty-four follow-up renal biopsies at the end of therapy showed a significant reduction in the activity score in both groups. The chronicity index increased in both groups but was only significant in the IVC group. Adverse events were similar. Major infections occurred in three patients in each group. There was no difference in gastrointestinal side-effects.
    CONCLUSIONS: MMF in combination with corticosteroids is an effective induction therapy for moderately severe proliferative lupus nephritis.
  10. Mak WY, Ong LM, Goh BL, Bavanandan S, Mushahar L, Leong CT, et al.
    BMJ Open, 2019 03 08;9(3):e024589.
    PMID: 30852538 DOI: 10.1136/bmjopen-2018-024589
    INTRODUCTION: Peritonitis is a major complication of continuous ambulatory peritoneal dialysis (CAPD), the risk of which is significantly influenced by the type of PD transfer system. Although the Y-disconnect and double-bag system is more efficient in preventing peritonitis compared with the spike system, little information is available to differentiate risks between different brands of the Y-disconnect double-bag system. A randomised controlled trial to evaluate the safety and efficacy of a newly introduced system is needed to provide the necessary clinical evidence to guide policy decision-making.

    METHODS AND ANALYSIS: The study is an open-label randomised controlled trial. A total of 434 patients with end-stage renal disease undergoing CAPD will be enrolled and randomised to either the intervention group, Stay Safe Link, or the control group, Stay Safe. All study subjects will be followed up and monitored for 1 year. The primary safety outcome is the rate of peritonitis while the primary efficacy outcomes are the delivered dialysis dose and ultrafiltration volume.

    ETHICS AND DISSEMINATION: The study was approved by the Medical Research Ethics Committee, National Institute of Health Malaysia. A written informed consent will be obtained from all participating subjects prior to any trial-related procedure and the study conduct will adhere strictly to Good Clinical Practice. The findings will be disseminated in a peer-reviewed journal.

    TRIAL REGISTRATION NUMBER: NCT03177031; Pre-results.

  11. Saminathan TA, Hooi LS, Mohd Yusoff MF, Ong LM, Bavanandan S, Rodzlan Hasani WS, et al.
    BMC Nephrol, 2020 08 14;21(1):344.
    PMID: 32795256 DOI: 10.1186/s12882-020-01966-8
    BACKGROUND: The prevalence of chronic kidney disease (CKD) in Malaysia was 9.07% in 2011. We aim to determine the current CKD prevalence in Malaysia and its associated risk factors.

    METHODS: A population-based study was conducted on a total of 890 respondents who were representative of the adult population in Malaysia, i.e., aged ≥18 years old. Respondents were randomly selected using a stratified cluster method. The estimated glomerular filtration rate (eGFR) was estimated from calibrated serum creatinine using the CKD-EPI equation. CKD was defined as eGFR

  12. Ong LM, Punithavathi N, Thurairatnam D, Zainal H, Beh ML, Morad Z, et al.
    Nephrology (Carlton), 2013 Aug;18(8):569-75.
    PMID: 23782264 DOI: 10.1111/nep.12112
    Aim: Treatment of chronic kidney disease (CKD) poses a huge burden to the healthcare system. To address the problem, the National Kidney Foundation of Malaysia embarked on a programme to screen for proteinuria and educate the public on CKD.

    Methods: The public was invited for health screening and the data collected over a 21 month period was analyzed.

    Results: In total, 40400 adults from all the states in Malaysia were screened. The screening population had a mean age of 41 years, 30.1% had hypertension and 10.6% had diabetes. Proteinuria was detected in 1.4% and haematuria in 8.9% of the participants. Factors associated with the highest risk for proteinuria were the presence of diabetes (adjusted odds ratio (OR) 2.63 (95% confidence interval (CI) 2.16-3.21)), hypertension (OR 2.49 (95% CI 2.03-3.07)) and cardiac disease (OR 2.05 (95% CI 1.50-2.81)). Other risk factors identified were lower educational level, family history of kidney disease, hypercholesterolaemia, obesity and lack of regular exercise. Chinese had the lowest risk for proteinuria among the races (OR 0.71 (95% CI 0.57-0.87) compared with Malays). The combination of high blood glucose and high blood pressure (BP) substantially increased the risk for proteinuria (OR 38.1 for glucose ≥ 10 mmol/L and systolic BP ≥ 180 mm Hg and OR 47.9 for glucose ≥ 10 mmol/L and diastolic BP ≥ 110 mm Hg).

    Conclusion: The prevalence of proteinuria in Malaysia is similar to other countries. The major risk factors for proteinuria were diabetes, hypertension and cardiac disease. The presence of both high blood pressure and high blood glucose exert a synergistic effect in substantially increasing the risk for proteinuria.

    Keywords: epidemiology; population studies; proteinuria.
  13. Lim TO, Lim YN, Wong HS, Ahmad G, Singam TS, Morad Z, et al.
    Med J Malaysia, 1999 Dec;54(4):459-70.
    PMID: 11072463
    We describe the outcomes on haemodialysis (HD) and continuous ambulatory peritoneal dialysis (CAPD) provided by the Ministry of Health (MOH). The assessment was based on data from the Malaysian Dialysis Registry on 2480 HD and 732 CAPD patients who commenced dialysis between 1980 and 1996. Young patients (age < 40) have remarkable long term survival (life expectancies of 16 years on HD, 18 years on CAPD). Adjusting for background mortality, relative survival of older patients was as good as younger ones. Diabetics did poorly. 52% of HD and 26% of CAPD patients were employed in 1996. 71% of HD patients scored 10(normal) on QL index (a measure of quality of life) while 60% of CAPD patients have similar score. Differences in rehabilitation and QL index scores by age, gender and diabetes were also observed. Outcomes of dialysis in the MOH programme are reassuring.
  14. Yam MF, Ang LF, Salman IM, Ameer OZ, Lim V, Ong LM, et al.
    J Med Food, 2009 Oct;12(5):1089-97.
    PMID: 19857074 DOI: 10.1089/jmf.2008.0005
    Orthosiphon stamineus Benth., which is used as a gastroprotective herbal remedy in Malaysia, was assessed for its anti-ulcerogenic activity against ethanol-induced ulcers in rats. Fifty percent methanol was used to extract the oven-dried O. stamineus leaves. The extract was then lyophilized with a rotary evaporator and freeze-dried. Oral administration of O. stamineus methanolic extract (OSME) (125, 250, 500, and 1,000 mg/kg) was found to significantly decrease the ulcer index (P < .01, P < .001, P < .001, and P < .001, respectively). Histological study of a section of the rat stomach also showed a marked improvement in the gastric mucosal damage in groups receiving OSME. In order to further investigate the gastroprotective mechanism of OSME, mucus secretion and lipid peroxidation level were estimated in vitro and ex vivo. OSME exhibited dose-dependent stimulation of mucus secretion (r = 0.718, P < .001) and inhibition of lipid peroxidation in rat gastric mucosal homogenates (both in vitro [r = 0.819, P < .05] and ex vivo [r = 0.981, P < .05]). It was concluded that the gastroprotective mechanism of OSME was partly due to its ability to inhibit lipid peroxidation and stimulate gastric mucus secretion.
  15. Ong LM, Punithavathi N, Lena YLL, Mahanim O, Leekha S, Storvas Clinical Trial Study Group
    Med J Malaysia, 2011 Aug;66(3):214-9.
    PMID: 22111443
    A multicentre study was conducted to assess the long term efficacy and safety of a generic atorvastatin in the treatment of primary hypercholesterolaemia. Eighty five patients who received 10mg or 20 mg of atorvastatin for 8 weeks depending on target cholesterol goal were followed up by their own physicians and had final evaluation at 52 weeks. Reduction in mean low density Lipoprotein (LDL-C) was 36.5%, 37.9% and 32.2% at weeks 4, 8 and 52 respectively. LDL-C target was maintained in 81% and 69% of patients at week 8 and 52 respectively without drug related serious adverse events. Generic atorvastatin is safe and effective in usual clinical care setting.
  16. Danial M, Sivasangari S, Arulappen A, Ong L
    Asian Pac J Cancer Prev, 2016;17(3):1363-8.
    PMID: 27039773
    Human papillomavirus (HPV) is a prevalent sexually transmitted infection with serious medical, sexual, and relationship consequences. HPV vaccine protection is available globally but unfortunately vaccine uptake is inconsistent everywhere. From this study, it was observed that the awareness of cervical cancer, HPV virus and HPV vaccination in Malaysia is high, at 83.1%, 73.9% and 73.3% of respondents, respectively. However, a considerably low percentage had undergone HPV vaccination (8.6%) compared to those who had experienced a Pap smear (32.9%). Awareness between cervical cancer and HPV virus and vaccination was low. Health care providers and the governing bodies have to play a vital role in disseminating holistic information on the vaccine and the importance of getting vaccinated to the public more vigorously in Malaysia.
  17. Ong HT, Oung LS, Ong LM, Tan KP
    Med J Malaysia, 2010 Mar;65(1):18-20.
    PMID: 21265241 MyJurnal
    A study of residents at the Silver Jubilee Home for the Aged was conducted to determine the prevalence, awareness and control of hypertension in this elderly community in Penang, Malaysia. Prevalence of hypertension was 36%, with 81% of patients being initially aware of this diagnosis. This relatively low hypertension prevalence rate may be because residents have a fairly sheltered lifestyle with less social stress and a daily routine that incorporates adequate exercise. Similarly, the high hypertension awareness rate compared to reported figures in the community may be because residents are more regularly monitored by the attending medical care-givers. At the beginning of the study, only 34% of hypertensive patients were well controlled with a blood pressure less than 140/90 mm Hg. This proportion rose to 53% at the end of study period. Compliance is better at a residential home because medication is served by their care-givers and cost is absorbed in this charitable organization. Our study suggests that hypertension awareness and control can be reasonable for the elderly in a residential home.
  18. Surendra NK, Abdul Manaf MR, Hooi LS, Bavanandan S, Mohamad Nor FS, Shah Firdaus Khan S, et al.
    BMC Nephrol, 2019 04 30;20(1):151.
    PMID: 31039745 DOI: 10.1186/s12882-019-1326-x
    BACKGROUND: Health related quality of life (HRQOL) is an important predictor of clinical outcomes for End Stage Renal Disease (ESRD) patients and to establish quality adjusted life years (QALYs) for economic evaluation studies. This study aims to measure the health utilities and to identify socio-demographic and clinical factors associated with HRQOL for haemodialysis (HD) and continuous ambulatory peritoneal dialysis (CAPD) in Malaysia.

    METHODS: A total of 141 patients (77 HD and 64 CAPD) from 1 federal and four state hospitals participated in this cross-sectional study. Patients were randomly selected from the National Renal Registry (NRR) using a stratified random sampling. The EQ-5D-3 L questionnaire was used to measure HRQOL. Variables investigated include dialysis modalities, sociodemographic characteristics, co-morbidities and biochemical markers. Utilities are measured on an ordinal scale of 0-1, where 1 indicates full health and 0 indicates death.

    RESULTS: The mean utility scores were 0.854 ± 0.181 and 0.905 ± 0.124 (p > 0.05) and the mean Visual Analogue Scale (VAS) scores were 76.2 ± 12.90 and 77.1 ± 10.26 (p > 0.05) for HD and CAPD patients respectively. There was a significant difference in problems reported between HD (35.1%) and CAPD (15.6%) on usual activities dimension (p = 0.009). The proportion of patients having problems in the pain/discomfort domain in both modalities was high (34.0%). Haemoglobin (

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