Displaying publications 61 - 80 of 157 in total

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  1. Tan EC, Tai MS, Chan WK, Mahadeva S
    JGH Open, 2019 Apr;3(2):117-125.
    PMID: 31061886 DOI: 10.1002/jgh3.12114
    Background and Aim: There is not much data on the association between non-alcoholic fatty liver disease (NAFLD) and advanced fibrosis assessed using Fibroscan with carotid intima-media thickness (CIMT) in the general population. The objective of this study was to evaluate the association between NAFLD and advanced fibrosis, as diagnosed by Fibroscan, with an increased CIMT in the Malaysian population.

    Methods: A cross-sectional study of government officers and their family members attending a health screening at a public healthcare facility was conducted. All subjects underwent clinical evaluation, biochemical testing, anthropometry, ultrasound carotid Doppler, and Fibroscan examination.

    Results: Data for 251 subjects were analyzed (mean age 47.1 ± 12.4 years, 74.1% male). Prevalence of NAFLD and advanced fibrosis were 57.4 and 17.5%, respectively. Independent factors associated with NAFLD were waist circumference (odds ratio [OR] = 1.077, 95% confidence interval [CI] 1.038-1.118, P < 0.001) and serum alanine aminotransferase (ALT) (OR = 1.039, 95% CI 1.005-1.074, P = 0.024). Independent factors associated with advanced fibrosis were male gender (OR = 4.847, 95% CI 1.369-17.155, P = 0.014) and serum aspartate aminotransferase (AST) (OR = 1.057, 95% CI 1.003-1.113, P = 0.036). Prevalence of increased CIMT was 29.0%. Independent factor associated with increased CIMT was older age (OR = 1.146, 95% CI 1.067-1.231, P < 0.001). Of the subjects, 34.5% with NAFLD had increased CIMT compared to 19.1% of the subjects without NAFLD (P = 0.063). Advanced fibrosis was not associated with increased CIMT.

    Conclusions: Prevalence of NAFLD, advanced liver fibrosis, and increased CIMT were high. NAFLD and advanced liver fibrosis appeared not to be associated with increased CIMT. However, a larger sample size is needed to demonstrate whether there is any association.

  2. Jaafar MH, Safi SZ, Tan MP, Rampal S, Mahadeva S
    Dig Dis Sci, 2018 05;63(5):1250-1260.
    PMID: 29192375 DOI: 10.1007/s10620-017-4871-9
    OBJECTIVE: The role of gastritis in dyspepsia remains controversial. We aimed to examine the efficacy of rebamipide, a gastric mucosal protective agent, in both organic and functional dyspepsia.

    DESIGN: A systematic review and meta-analysis was performed. The following databases were searched using the keywords ("rebamipide" OR "gastroprotective agent*" OR "mucosta") AND ("dyspepsia" OR "indigestion" OR "gastrointestinal symptoms"): PubMed, Wed of Science, Embase, CINAHL, Cochrane Clinical Trials Register. The primary outcome was dyspepsia or upper GI symptom score improvement. Pooled analysis of the main outcome data were presented as risk ratio (RR) for dichotomous data and standardized mean difference (SMD) for continuous data.

    RESULTS: From an initial 248 records, 17 randomised controlled trial (RCT) publications involving 2170 subjects (1224 rebamipide, 946 placebo/control) were included in the final analysis. Twelve RCTs were conducted in subjects with organic dyspepsia (peptic ulcer disease, reflux esophagitis or NSAID-induced gastropathy) and five RCTs were conducted in patients with functional dyspepsia (FD). Overall, dyspepsia symptom improvement was significantly better with rebamipide compared to placebo/control drug (RR 0.77, 95% CI = 0.64-0.93; SMD -0.46, 95% CI = -0.83 to -0.09). Significant symptom improvement was observed both in pooled RR and SMD in subjects with organic dyspepsia (RR 0.72, 95% CI = 0.61-0.86; SMD -0.23, 95% CI = -0.4 to -0.07), while symptom improvement in FD was observed in pooled SMD but not RR (SMD -0.62, 95% CI = -1.16 to -0.08; RR 1.01, 95% CI = 0.71-1.45).

    CONCLUSION: Rebamipide is effective in organic dyspepsia and may improve symptoms in functional dyspepsia.

  3. Chan WK, Azmi N, Mahadeva S, Goh KL
    World J Gastroenterol, 2014 Oct 21;20(39):14488-94.
    PMID: 25339836 DOI: 10.3748/wjg.v20.i39.14488
    To compare same-day whole-dose vs split-dose of 2-litre polyethylene glycol electrolyte lavage solution (PEG-ELS) plus bisacodyl for colon cleansing for morning colonoscopy.
  4. Wah Kheong C, Nik Mustapha NR, Mahadeva S
    Clin Gastroenterol Hepatol, 2017 Dec;15(12):1940-1949.e8.
    PMID: 28419855 DOI: 10.1016/j.cgh.2017.04.016
    BACKGROUND & AIMS: Silymarin is a complex mixture of 6 major flavonolignans and other minor polyphenolic compounds derived from the milk thistle plant Silybum marianum; it has shown antioxidant, anti-inflammatory and antifibrotic effects, and may be useful in patients with nonalcoholic fatty liver disease (NAFLD). We aimed to study the efficacy of silymarin in patients with nonalcoholic steatohepatitis (NASH)-the more severe form of NAFLD.

    METHODS: We performed a randomized, double-blind, placebo-controlled trial of consecutive adults with biopsy-proven NASH and a NAFLD activity score (NAS) of 4 or more at a tertiary care hospital in Kuala Lumpur, Malaysia, from November 2012 through August 2014. Patients were randomly assigned to groups given silymarin (700 mg; n = 49 patients) or placebo (n = 50 patients) 3 times daily for 48 weeks. After this 48-week period, liver biopsies were repeated. The primary efficacy outcome was a decrease of 30% or more in NAS; findings from 48-week liver biopsies were compared with those from the baseline biopsy. Secondary outcomes included changes in steatosis, lobular inflammation, hepatocyte ballooning, NAS and fibrosis score, and anthropometric measurements, as well as glycemic, lipid, and liver profiles and liver stiffness measurements.

    RESULTS: The percentage of patients achieving the primary efficacy outcome did not differ significantly between the groups (32.7% in the silymarin group vs 26.0% in the placebo group; P = .467). A significantly higher proportion of patients in the silymarin group had reductions in fibrosis based on histology (reductions of 1 point or more; 22.4%) than did the placebo group (6.0%; P = .023), and based on liver stiffness measurements (decrease of 30% or more; 24.2%) than did the placebo group (2.3%; P = .002). The silymarin group also had significant reductions in mean aspartate aminotransferase to platelet ratio index (reduction of 0.14, P = .011 compared with baseline), fibrosis-4 score (reduction of 0.20, P = .041 compared with baseline), and NAFLD fibrosis score (reduction of 0.30, P < .001 compared with baseline); these changes were not observed in the placebo group (reduction of 0.07, P = .154; increase of 0.18, P = .389; and reduction of 0.05, P = .845, respectively). There was no significant difference between groups in number of adverse events; adverse events that occurred were not attributed to silymarin.

    CONCLUSIONS: In a randomized trial of 99 patients, we found that silymarin (700 mg, given 3 times daily for 48 weeks) did not reduce NAS scores by 30% or more in a significantly larger proportion of patients with NASH than placebo. Silymarin may reduce liver fibrosis but this remains to be confirmed in a larger trial. It appears to be safe and well tolerated. ClinicalTrials.gov: NCT02006498.

  5. Thalha AM, Mahadeva S, Boon Tan AT, Mun KS
    JGH Open, 2018 Oct;2(5):242-245.
    PMID: 30483596 DOI: 10.1002/jgh3.12083
    A 33-year-old man was referred with hyperosmotic symptoms of 4 weeks. Clinical examination showed palpable hepatomegaly and no stigmata of liver disease. Findings were random glucose 16.6 mmol/L, HbA1c 12.4%, triglyceride 6.2 mmol/L, normal LFTs and ultrasound liver: increased echogenicity. Management consisted of dietician referral and commencement of metformin 500 mg bd, diamicron MR 60 mg od, and fenofibrate 145 mg od. He was non-compliant, complaining of "heaviness of head" after consuming oral diabetic agents, without symptoms of hypoglycemia. Treatment was switched to Kombiglyze XR (saxaglipitin 5 mg + metformin 1000 mg) and empagliflozin 25 mg od. He presented 1 week later with generalised pruritus with ALT 307 IU/L and serum GGT 808 IU/L. Following this, a percutaneous liver biopsy was performed, revealing steatohepatitis and marked intra-hepatic cholestasis. Kombiglyze XR was withheld, with resolution of LFTs to baseline. Phenotypes of liver injury are categorised according to R value, defined as ratio ALT/ULN:ALP/ULN. R value of ≥5:hepatocellular injury, ≤2:cholestatic injury, 2-5:mixed-type injury. Here, R value points toward mixed type (R = 3.203). Hepatotoxicity in patients with NASH is difficult to diagnose, based on laboratory parameters. Liver histology was useful in indicating additional changes apart from NASH, causing liver derangement. The Rousal Uclaf Causality Assessment Method is a scoring method to determine the probability of drug induced liver injury. RUCAM score for this case was 6 (probable adverse drug reaction). Hepatotoxicity from saxagliptin not been reported prior. Clinicians need to be more vigilant, particularly in patients with NASH.
  6. Rajaram R, Subramani B, Abdullah BJJ, Mahadeva S
    JGH Open, 2017 Dec;1(4):153-155.
    PMID: 30483553 DOI: 10.1002/jgh3.12027
    Mesenchymal stem cell (MSC) transplant may offer an alternative to liver transplantation in patients with end-stage liver disease. However, its efficacy remains uncertain. MSC was performed on a 50-year-old male with decompensated (Child-Turcotte-Pugh grade C) alcoholic liver cirrhosis due to an absence of donors for adult-deceased and living-related liver transplantation. Autologous bone marrow-derived MSCs were harvested from the patient and cultured using standard protocols. The MSCs were subsequently re-administrated into the liver via hepatic intra-arterial infusion on two separate occasions. After infusion, there was an improvement in biochemical parameters (serum total bilirubin, serum albumin), and a reduction of diuretic use for ascites for up to 8 weeks. However, all biochemical and clinical parameters deteriorated on long-term follow-up without any further infusions. The patient eventually succumbed to his disease. MSC transplantation may have a clinical benefit on adult patients with end-stage liver cirrhosis, but this appears to be transitory.
  7. Wong Z, Mok CZ, Majid HA, Mahadeva S
    JGH Open, 2018 Oct;2(5):178-181.
    PMID: 30483586 DOI: 10.1002/jgh3.12069
    Background: The efficacy and acceptance of a low fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAP) diet in Asian adults with irritable bowel syndrome (IBS) remain uncertain. We aimed to describe our early experience in a single center with a dedicated gastroenterology dietetic service.

    Methods: Consecutive patients with IBS referred to our dedicated Dietetic Gastroenterology Clinic between February 2016 and May 2016 were screened. A low FODMAP diet was instituted as per standard protocol. Data on demographic and clinical variables were obtained from patients' records and prospective telephone interviews.

    Results: A total of 16 patients, with a median age of 67 ± 13.57 years; female gender n = 10 (62.5%); ethnicity: Chinese n = 8 (50%), Indian n = 5 (31.25%), and Malay n = 3 (18.75%) with IBS, were included in the study. Compliance with the low FODMAP diet was complete in 8 of 16 (50%) patients, partial in 4 of 16 (25%), and 4 of 16 (25%) could not comply with the diet at all. Improvement in symptoms were reported in 11 of 16 (68.8%) patients. Among patients who complied (complete/partial) with the low FODMAP diet, predominant symptom improvement was reported as follows: abdominal pain 3 of 5 (60%), abdominal bloating/distension 7 of 10 (70%), and flatulence 7 of 8 (87.5%). Patients with the IBS-D subtype appeared to have the greatest improvement in stool consistency (87.5% IBS-D vs 12.5% non-IBS-D, P = 0.009).

    Conclusion: Based on our pilot observational study of a relatively small sample of Asian IBS patients, compliance with a low FODMAP diet appears to be low. Further larger studies are required to verify our observation.

    Study site: Universiti Malaya Medical Centre (UMMC)
  8. Jayaraman T, Lee YY, Chan WK, Mahadeva S
    JGH Open, 2020 Jun;4(3):332-339.
    PMID: 32514433 DOI: 10.1002/jgh3.12275
    Liver diseases form a heterogenous group of acute and chronic disorders of varying etiologies. Not only do they result in significant morbidity and mortality, but they also lead to a marked reduction in quality of life, together with a high socioeconomic burden globally. A better understanding of their global distribution is necessary to curb the massive health-care and socioeconomic burden that they entail. Notable differences and similarities have been described between common liver disease conditions occurring in Asia and the West (Europe and North America), giving rise to the need for an updated collective appraisal of this subject. In this review, the epidemiological differences of common liver conditions, specifically acute liver failure, drug-induced liver injury, acute-on-chronic liver failure, hepatocellular carcinoma, and non-alcoholic fatty liver disease, between Asia and the West are discussed.
  9. Mahadeva S, Yadav H, Rampal S, Goh KL
    Am J Gastroenterol, 2010 Apr;105(4):904-12.
    PMID: 20179699 DOI: 10.1038/ajg.2010.26
    The epidemiology and impact of dyspepsia in rural Asia remains uncertain. We aimed to determine the prevalence epidemiology and impact of dyspepsia in a rural Malaysian community.
  10. Chuah KH, Cheong SY, Lim SZ, Mahadeva S
    J Dig Dis, 2022 Jan 20.
    PMID: 35050547 DOI: 10.1111/1751-2980.13082
    OBJECTIVE: Functional gastrointestinal disorders (FGIDs) are known to have a significant impact on patients' quality of life and lead to a greater healthcare burden. In this study we aimed to investigate whether this healthcare burden differs among various types of FGIDs in secondary care.

    METHODS: A retrospective study of consecutive adults with luminal gastrointestinal (GI) diseases in a secondary healthcare gastroenterology clinic was conducted. The frequency of FGIDs and differences in healthcare utilization among different types of FGIDs were explored.

    RESULTS: Among 1206 patients with luminal GI disease, 442 (36.7%) had FGIDs. FGIDs patients were older (67 y vs 62 y, P 

  11. Kamarajah SK, Chan WK, Nik Mustapha NR, Mahadeva S
    Hepatol Int, 2018 Jan;12(1):44-55.
    PMID: 29372507 DOI: 10.1007/s12072-018-9843-4
    INTRODUCTION: The value of repeated liver stiffness measurement (LSM) in non-alcoholic fatty liver disease (NAFLD) has not been shown before.

    METHODS: A longitudinal study of biopsy-proven NAFLD patients was conducted at the Asian tertiary hospital from November 2012 to January 2017. Patients with paired liver biopsies and LSM were followed prospectively for liver-related and non-liver related complications, and survival.

    RESULTS: The data for 113 biopsy-proven NAFLD patients (mean age 51.3 ± 10.6 years, male 50%) were analyzed. At baseline, advanced fibrosis based on histology and LSM was observed in 22 and 46%, respectively. Paired liver biopsy and LSM at 1-year interval was available in 71 and 80% of patients, respectively. High-risk cases (defined as patients with advanced fibrosis at baseline who had no fibrosis improvement, and patients who developed advanced fibrosis on repeat assessment) were seen in 23 and 53% of patients, based on paired liver biopsy and LSM, respectively. Type 2 diabetes mellitus was independently associated with high-risk cases. The median follow-up was 37 months with a total follow-up of 328 person-years. High-risk cases based on paired liver biopsy had significantly higher rates of liver-related complications (p = 0.002) but no difference in other outcomes. High-risk patients based on paired LSM had a significantly higher rate of liver-related complications (p = 0.046), cardiovascular events (p = 0.025) and composite outcomes (p = 0.006).

    CONCLUSION: Repeat LSM can predict liver-related complications, similar to paired liver biopsy, and may be useful in identifying patients who may be at an increased risk of cardiovascular events. Further studies in a larger cohort and with a longer follow-up should be carried out to confirm these observations.

  12. Leung HK, Mahadeva S, Rajaram RB, Lai PSM
    Eur J Gastroenterol Hepatol, 2023 Mar 01;35(3):333-341.
    PMID: 36708305 DOI: 10.1097/MEG.0000000000002493
    BACKGROUND: Assessing a patient's knowledge regarding liver cirrhosis is important to improve patient outcomes. This study aimed to develop and validate the Adult cirrhosiS Knowledge Questionnaire (ASK-Q) to assess patients' knowledge regarding liver cirrhosis from multiple aspects.

    METHODS: A 24-item ASK-Q with four domains: self-understanding (5 items), aetiology (5 items), complications (5 items) and management (9 items) of liver cirrhosis was developed based on literature review and expert panel input. It was then piloted in five English-speaking patients with liver cirrhosis. These patients commented that the font size was too small. Hence, the font was enlarged and the final version of the ASK-Q was administered to English-speaking patients with liver cirrhosis, aged ≥18 years, with or without decompensation, at a tertiary hospital, from September 2020 to November 2021, at baseline and fortnight later. Patients with encephalopathy were excluded.

    RESULTS: 120/135 patients agreed to participate (response rate = 88.9%). The overall median score was 59.1 (45.6-68.2). A total of 7/22 (31.8%) items were "easy", 14/22 (63.6%) items were "moderately easy" and 1/22 (4.5%) items were "difficult". Exploratory factor analysis extracted nine factors, and two items were omitted. The ASK-Q was able to discriminate the knowledge level of patients with and without tertiary education [59.1 (50.0-72.7) vs. 54.5 (36.4-63.6); P 

  13. Beh KH, Chuah KH, Rappek NAM, Mahadeva S
    PLoS One, 2021;16(1):e0245511.
    PMID: 33497382 DOI: 10.1371/journal.pone.0245511
    BACKGROUND AND AIM: The association between body mass index (BMI) and functional gastrointestinal disorders (FGIDs) has been inconsistent. We aimed to explore the association of BMI with FGIDs in a primary care setting to provide more data in this area.

    METHODS: A cross-sectional study of consecutive Asian adults attending a primary healthcare setting was conducted. This study was conducted in 2 phases: The association between BMI and common FGIDs (functional diarrhea/FD, irritable bowel syndrome/IBS, functional diarrhea and functional constipation/FC) was studied initially. The influence of anxiety and depression on BMI and FGIDs was additionally explored in phase 2.

    RESULTS: A total of 1002 subjects (median age 32 years, 65.4% females, 90.7% Malay ethnicity, 73.2% higher than secondary level education) were recruited between August 2019 to January 2020. The majority of subjects were obese (39.2%), and had central obesity (51.7%), while 6.1% had metabolic syndrome. The prevalence of FD, IBS, functional diarrhea and FC were 7.5% (n = 75), 4.0% (n = 40), 1.2% (n = 12) and 10.5% (n = 105) respectively, based on the Rome III criteria. Among individual FGIDs, FD subjects had more underweight adults (BMI<18.5kg/m2) compared to controls (13.3% vs 3.5%, P = 0.002) and being underweight remained as an independent association with FD [OR = 3.648 (95%CI 1.494-8.905), P = 0.004] at multi-variate analysis. There were no independent associations between BMI and other FGIDs. When psychological morbidity was additionally explored, anxiety (OR 2.032; 95%CI = 1.034-3.991, p = 0.040), but not depression, and a BMI<18.5kg/m2 (OR 3.231; 95%CI = 1.066-9.796, p = 0.038) were found to be independently associated with FD.

    CONCLUSIONS: FD, but not other FGIDs, is associated with being underweight. This association is independent of the presence of anxiety.

  14. Mahadeva S, Yadav H, Everett SM, Goh KL
    J Neurogastroenterol Motil, 2012 Jan;18(1):43-57.
    PMID: 22323987 DOI: 10.5056/jnm.2012.18.1.43
    BACKGROUND/AIMS: The economic impact of dyspepsia in regions with a diverse healthcare system remains uncertain. This study aimed to estimate the costs of dyspepsia in a rural and urban population in Malaysia.

    METHODS: Economic evaluation was performed based on the cost-of-illness method. Resource utilization and quality of life data over a specific time frame, were collected to determine direct, indirect and intangible costs related to dyspepsia.

    RESULTS: The prevalences of dyspepsia in the rural (n = 2,000) and urban (n = 2,039) populations were 14.6% and 24.3% respectively. Differences in socioeconomic status and healthcare utilisation between both populations were considerable. The cost of dyspepsia per 1,000 population per year was estimated at USD14,816.10 and USD59,282.20 in the rural and urban populations respectively. The cost per quality adjusted life year for dyspepsia in rural and urban adults was USD16.30 and USD69.75, respectively.

    CONCLUSIONS: The economic impact of dyspepsia is greater in an urban compared to a rural setting. Differences in socioeconomic status and healthcare utilisation between populations are thought to contribute to this difference.

  15. Lai PS, Wong YY, Low YC, Lau HL, Chin KF, Mahadeva S
    PeerJ, 2014;2:e451.
    PMID: 25024919 DOI: 10.7717/peerj.451
    Background. Proton pump inhibitors (PPIs) are currently the most effective agents for acid-related disorders. However, studies show that 25-75% of patients receiving intravenous PPIs had no appropriate justification, indicating high rates of inappropriate prescribing. Objective. To examine the appropriate use of intravenous PPIs in accordance with guidelines and the efficacy of a prescribing awareness intervention at an Asian teaching institution. Setting. Prospective audit in a tertiary hospital in Malaysia. Method. Every 4th intravenous PPI prescription received in the pharmacy was screened against hospital guidelines. Interventions for incorrect indication/dose/duration were performed. Patients' demographic data, medical history and the use of intravenous PPI were collected. Included were all adult inpatients prescribed intravenous PPI. Main Outcome Measure. Proportion of appropriate IV PPI prescriptions. Results. Data for 106 patients were collected. Most patients were male [65(61.3%)], Chinese [50(47.2%)], with mean age ± SD = 60.3 ± 18.0 years. Most intravenous PPI prescriptions were initiated by junior doctors from the surgical [47(44.3%)] and medical [42(39.6%)] departments. Only 50/106(47.2%) patients had upper gastrointestinal endoscopy/surgery performed to verify the source of bleeding. Unexplained abdominal pain [81(76.4%)] was the main driver for prescribing intravenous PPIs empirically, out of which 73(68.9%) were for suspected upper gastrointestinal bleed. Overall, intravenous PPI was found to be inappropriately prescribed in 56(52.8%) patients for indication, dose or duration. Interventions on the use of intravenous PPI were most effective when performed by senior doctors (100%), followed by clinical pharmacists (50%), and inpatient pharmacists (37.5%, p = 0.027). Conclusion. Inappropriate intravenous PPI usage is still prevalent despite the enforcement of hospital guidelines. The promotion of prescribing awareness and evidence-based prescribing through education of medical staff could result in more judicious use of intravenous PPI and dose-optimization.
  16. Chan WK, Roslani AC, Law CW, Goh KL, Mahadeva S
    J Dig Dis, 2013 Dec;14(12):670-5.
    PMID: 23981291 DOI: 10.1111/1751-2980.12097
    To compare the outcomes and costs of endoluminal clipping and surgery in the management of iatrogenic colonic perforation.
  17. Mahadeva S, Mahfudz AS, Vijayanathan A, Goh KL, Kulenthran A, Cheah PL
    J Dig Dis, 2013 Nov;14(11):604-10.
    PMID: 23859493 DOI: 10.1111/1751-2980.12088
    To determine the accuracy of transient elastography (TE) and factors associated with discordance between TE and liver histology in patients with non-alcoholic fatty liver disease (NAFLD).
  18. Rampal S, Mahadeva S, Guallar E, Bulgiba A, Mohamed R, Rahmat R, et al.
    PLoS One, 2012;7(9):e46365.
    PMID: 23029497 DOI: 10.1371/journal.pone.0046365
    The prevalence of metabolic syndrome is increasing disproportionately among the different ethnicities in Asia compared to the rest of the world. This study aims to determine the differences in the prevalence of metabolic syndrome across ethnicities in Malaysia, a multi-ethnic country.
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