Displaying publications 1 - 20 of 55 in total

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  1. Khalid BAK
    Family Practitioner, 1988;11(1):94-95.
    The problem of diabetes is large unknown due to lack of good epidemiological studies. The author's own studies showed a prevalence rate, in the Malays, of less than 1.0% in remote rural areas, 3.9% in a village close to Kuala Lumpur, and 3.0% for Malays working in a railway yard in Kuala Lumpur. The prevalence rate for the Chinese was 4.9% in the same survey, and for the Indian it was 16.0%. A survey in GHKL showed that 17.9% of the patients admitted for a month period in 1986 were due to diabetes and its complications. Majority of diabetes in Malaysia are non-insulin-dependent type.
    Matched MeSH terms: Epidemiologic Studies
  2. Hassan, R., Rahimah, A.K.
    MyJurnal
    Epidemiological studies of occlusion and malocclusion not only help in orthodontic treatment planning and evaluation of dental health services but also offer a valid research tool for ascertaining the operation of distinct environmental and genetic factors in the aetiology of malocclusion. The objective of this article was to give an overview on occlusion, malocclusion and the various methods on measuring the occlusion. Each index and method of the assessment described was based on the opinion of an individual or a group of individuals. It had been widely agreed that no particular index or method available that are truly inclusive of all occlusal criteria. Therefore, different indices or method had been developed according to different requirements and it may be necessary to use more than one index in order to gather information to suit the objective of the particular study.
    Matched MeSH terms: Epidemiologic Studies
  3. Kua KP, Chongmelaxme B, Lee SWH
    J Infect Dis, 2023 Feb 14;227(4):471-482.
    PMID: 35512129 DOI: 10.1093/infdis/jiac179
    BACKGROUND: Tuberculosis is one of the leading causes of mortality worldwide from an infectious disease. This review aimed to investigate the association between prior cytomegalovirus infection and tuberculosis disease.

    METHODS: Six bibliographic databases were searched from their respective inception to 31 December 2021. Data were pooled using random-effects meta-analysis.

    RESULTS: Of 5476 identified articles, 15 satisfied the inclusion criteria with a total sample size of 38 618 patients. Pooled findings showed that individuals with cytomegalovirus infection had a higher risk of tuberculosis disease compared to those not infected with cytomegalovirus (odds ratio [OR], 3.20; 95% confidence interval [CI], 2.18-4.70). Age was the only covariate that exerted a significant effect on the result of the association. Meta-analysis of risk estimates reported in individual studies showed a marked and significant correlation of cytomegalovirus infection with active tuberculosis (adjusted hazard ratio, 2.92; 95% CI, 1.34-4.51; adjusted OR, 1.14; 95% CI, .71-1.57). A clear dose-response relation was inferred between the levels of cytomegalovirus antibodies and the risks of tuberculosis events (OR for high levels of cytomegalovirus antibodies, 4.07; OR for medium levels of cytomegalovirus antibodies, 3.58).

    CONCLUSIONS: The results suggest an elevated risk of tuberculosis disease among individuals with a prior cytomegalovirus infection.

    Matched MeSH terms: Epidemiologic Studies
  4. Ab Ghani A, Nayan SA, Kandasamy R, Rosman AK, Ghani AR
    Malays J Med Sci, 2016 Nov;23(6):113-117.
    PMID: 28090185 MyJurnal DOI: 10.21315/mjms2016.23.6.12
    The annual incidence of intracranial aneurysm in Malaysia is estimated to be 1.1-1.7 per 100,000 population based on a study done conducted in 1988. Since then, little epidemiological research has been conducted in Malaysia, and the real incidence is therefore probably unreported despite advancements in the diagnosis and treatment of this disorder. Intracranial aneurysm may be treated by microsurgical clipping or embolisation depending on its location and the surgeon's preference. This study aims to report the characteristics and outcomes of patients with a clipped anterior circulation aneurysm in Hospital Sungai Buloh.
    Matched MeSH terms: Epidemiologic Studies
  5. Marianor M, Zaidah AW, Maraina ChC
    Biomark Insights, 2015;10:75-9.
    PMID: 26339184 DOI: 10.4137/BMI.S24353
    Epidemiological studies have shown that vascular-related disorders are associated with high von Willebrand factor antigen (VWF:Ag) and VWF propeptide (VWFpp). VWFpp is secreted together with VWF:Ag upon endothelial cell activation, hence it could be a potential biomarker. This study was conducted to compare between VWF:Ag and VWFpp levels among 30 healthy individuals and 42 patients with high levels of VWF:Ag in different medical conditions and ABO blood groups. VWFpp levels were strongly correlated with VWF:Ag. VWF:Ag and VWFpp levels were significantly increased in patients compared to healthy individuals. VWFpp is not affected by ABO blood group in both healthy individual and patient groups unlike VWF:Ag. As expected, this study showed that VWFpp levels increased in parallel with VWF:Ag levels in patients with diseases associated with endothelial activation. VWFpp though nonspecific is a potential biomarker reflecting underlying pathophysiological changes in various medical conditions with an additional advantage of not being influenced by ABO blood groups.
    Matched MeSH terms: Epidemiologic Studies
  6. Arifin SRM, Cheyne H, Maxwell M
    AIMS Public Health, 2018;5(3):260-295.
    PMID: 30280116 DOI: 10.3934/publichealth.2018.3.260
    The purpose of this review was to examine articles related to recent epidemiological evidence of the prevalence of maternal postnatal depression (PND) across different countries and cultures and to identify specific epidemiological studies that have been carried out exclusively in Malaysia on the prevalence of maternal PND. The review was undertaken in two stages, an initial review and an updated review. At both stages systematic literature searches of online databases were performed to identify articles on the prevalence of maternal PND. A total of 124 articles concerning research conducted in more than 50 countries were included in the final analysis. There were wide variations in the screening instruments and diagnostic tools used although the Edinburgh Postnatal Depression Scale (EPDS) was the most common instrument applied to identify PND. The prevalence of maternal PND ranged from 4.0% to 63.9%, with Japan and America recording the lowest and highest rates, respectively. Within continents, a wide variation in reported prevalence was also found. The reported rates of maternal PND in Malaysia were much higher than that previously documented with a range of 6.8-27.3%. This review indicated that the widely cited prevalence of maternal PND of 10-15% underestimates rates of PND worldwide. The reasons for this variability may not be fully explained by review methods. Future studies should evaluate the nature of women's PND experiences across cultures to explain these wide variations.
    Matched MeSH terms: Epidemiologic Studies
  7. Siti Nurshahbani, S., Azrina, A.
    MyJurnal
    High intake of trans fatty acids (TFA) may cause adverse changes in blood lipids as shown in many epidemiological studies. The major sources of TFA in human diet come from bakery products such as cookies, cakes, muffins, breads and pastries. In this study, total fat of baked products was determined using Soxhlet method while TFA content was determined on gas chromatograph using a highly polar capillary column and flame ionization detector. Exposure to TFA from the baked product was estimated based on Food Consumption Statistics of Malaysia 2003. High level of TFA was observed in muffins (3.21-7.34 g per 100 g food) followed by pastries (2.90-6.03 g per 100 g food) and cakes (2.26-8.36 g per 100 g food) regardless of products having brand name or not. Among the TFA isomers, trans 18:1 6t was the most abundant followed by trans 18:1 9t, trans 16:1 9t, trans 18:2 and small quantities of trans 18:1 11t. Exposure to TFA based on the Malaysian Food Consumption Statistics 2003 of the baked products was ranging from 0.14-0.18 g/day. Even with the low estimated exposure, actual intake of baked products must be monitored closely as other high fat food as these products is one of main contributor to TFA in the diet following their high frequency of daily intake.
    Matched MeSH terms: Epidemiologic Studies
  8. Ramadas, A., Kandiah, M., Jabbar, F., Zarida, H.
    MyJurnal
    At least 6 million deaths occurred worldwide are due to cancer and this figure is expected to rise to
    15 millions by the year 2020. Colorectal cancer is among the most commonly occurring cancers
    both globally and in Malaysia. Numerous studies have shown significant relationships between
    various dietary components and the risks for colorectal cancer. Meanwhile, several theories have
    been suggested as etiological explanations, one of which is the influence of dietary factors on the
    cell proliferation rate. A higher cell proliferation rate is statistically associated with increased risk
    of colorectal cancer. However, evidence of a significant relationship between diet and colorectal
    adenomas, a potential precursor for colorectal cancer, remains insufficient. Colorectal adenomas or
    polyps are vital in their relationship with colorectal cancers as almost 70% of all colorectal cancers
    are developed from these polyps. Studying the modifiable risk factors related to polyps will provide
    an opportunity for the prevention of colorectal cancer even before it develops. This paper reviews
    the available evidence linking dietary factors with the risk for colorectal adenomas. As the numbers
    of published studies are limited, of which most are concentrated in Western countries, there is a
    need for epidemiological studies in Malaysia to strengthen the evidence of a relationship between
    diet and colorectal adenomas.
    Matched MeSH terms: Epidemiologic Studies
  9. Peter Michael Barling
    MyJurnal
    A review of current information related to the likely incidences of thyroid diseases in the aged population of Malaysia, raising issues such as the need for further epidemiological studies of iodine intake in relation to thyroid diseases within different geographical regions and population subtypes, the need for general country-wide iodization of salt, and the screening of elderly Malaysians for so-called “occult” thyroid diseases.
    Matched MeSH terms: Epidemiologic Studies
  10. Nur Syazwani Jarkasi, Zamberi Sekawi, Cheah, Yoke Kqueen, Zulkefley Othman
    MyJurnal
    Torque Teno Virus (TTV) is a human-infected virus that is present ubiquitously in nature. Globally, it infects up to 95% of the healthy individuals without any clinical manifestations. The widely used laboratory diagnosis of TTV infection is Polymerase chain reaction (PCR). Nevertheless, several other methods have been developed. The rapid growth of TTV variants over time has posed a challenge in estimating the global TTV infection as none of the PCR protocol has the ability to detect the entire spectrum of TTV variants. Multiple TTV epidemiological studies have been conducted among Asian population, whereas other continents showed a limited number of studies. The horizontal and vertical transmission of TTV among humans population, as well as interspecies transmission are potentially related to the global widespread of TTV infection.
    Matched MeSH terms: Epidemiologic Studies
  11. Rath A, Ramamurthy PH, Fernandes BA, Sidhu P
    J Conserv Dent, 2017 9 1;20(2):134-136.
    PMID: 28855763 DOI: 10.4103/0972-0707.212237
    Tooth surface loss (TSL) is a complex phenomenon characterized by the loss of hard tooth structure at various locations of the teeth, usually due to more than one factor. TSL due to abrasion can be significant in patients consuming coarse, abrasive diet. The present case reports an interesting incisal edge abrasion in a female patient, attributed to a particular dietary behavior of long-term consumption of sunflower seeds. All her family members and most of the people from her native place were also reported to have similar lesions by the patient. Larger epidemiological studies to assess the prevalence and severity of such abrasive lesions in geographic areas with this particular dietary habit need to be carried out so that people may be made aware and educated about alternative ways of eating sunflower seeds that will not cause any form of tooth wear.
    Matched MeSH terms: Epidemiologic Studies
  12. Naina Mohamed I, Borhanuddin B, Shuid AN, Mohd Fozi NF
    PMID: 23118786 DOI: 10.1155/2012/250584
    Purpose. This paper explores the effects of vitamin E on bone structural changes. Methods. A systematic review of the literature was conducted to identify relevant studies about vitamin E and osteoporosis/bone structural changes. A comprehensive search in Medline and CINAHL for relevant studies published between the years 1946 and 2012 was conducted. The main inclusion criteria were published in English, studies had to report the association or effect of vitamin E and osteoporosis-related bone changes, and the osteoporosis-related bone changes should be related to lifestyle variables, aging, or experimentally-induced conditions. Results. The literature search identified 561 potentially relevant articles, whereby 11 studies met the inclusion criteria. There were three human epidemiological studies and eight animal experimental studies included in this paper. Four animal studies reported positive bone structural changes with vitamin E supplementation. The rest of the studies had negative changes or no effect. Studies with positive changes reported better effects with tocotrienol vitamin E isomer supplementation. Conclusions. This evidence-based review underscores the potential of vitamin E being used for osteoporosis. The effect of one of the vitamin E isomers, tocotrienols, on bone structural changes warrants further exploration. Controlled human observational studies should be conducted to provide stronger evidence.
    Matched MeSH terms: Epidemiologic Studies
  13. Bakar NF, Chen AH, Noor AR, Goh PP
    Malays J Med Sci, 2012 Apr;19(2):48-55.
    PMID: 22973137 MyJurnal
    The epidemiological study of vision problems is important for developing national strategies for the prevention of visual impairment. There was a lack of information regarding vision problems among school children in East Malaysia. The purpose of this study was to compare the refractive errors and degrees of visual impairment between Native Iban and Malay school children who participated in a formal government vision loss prevention programme conducted in a rural area of Betong Division, Malaysia.
    Matched MeSH terms: Epidemiologic Studies
  14. Radwan H, Hashim M, Shaker Obaid R, Hasan H, Naja F, Al Ghazal H, et al.
    PLoS One, 2018;13(5):e0198278.
    PMID: 29851999 DOI: 10.1371/journal.pone.0198278
    BACKGROUND: The United Arab Emirates (UAE) exhibits alarming high prevalence of Non-Communicable Diseases (NCDs) and their risk factors. Emerging evidence highlighted the role of maternal and early child nutrition in preventing later-onset NCDs. The objectives of this article are to describe the design and methodology of the first Mother and Infant Study Cohort (MISC) in UAE; present the baseline demographic characteristics of the study participants; and discuss the challenges of the cohort and their respective responding strategies.

    METHODS: The MISC is an ongoing two-year prospective cohort study which recruited Arab pregnant women in their third trimester from prenatal clinics in Dubai, Sharjah and Ajman. Participants will be interviewed six times (once during pregnancy, at delivery, and at 2, 6, 12 and 24months postpartum). Perinatal information is obtained from hospital records. Collected data include socio-demographic characteristics, lifestyle, dietary intake and anthropometry; infant feeding practices, cognitive development; along with maternal and infant blood profile and breast milk profile.

    RESULTS: The preliminary results reported that 256 completed baseline assessment (mean age: 30.5±6.0 years; 76.6% multiparous; about 60% were either overweight or obese before pregnancy). The prevalence of gestational diabetes was 19.2%. Upon delivery, 208 women-infant pairs were retained (mean gestational age: 38.5±1.5 weeks; 33.3% caesarean section delivery; 5.3% low birthweight; 5.7% macrosomic deliveries). Besides participant retention, the main encountered challenges pertained to cultural complexity, underestimation the necessary start-up time, staff, and costs, and biochemical data collection.

    CONCLUSIONS: Despite numerous methodological, logistical and sociocultural challenges, satisfactory follow-up rates are recorded. Strategies addressing challenges are documented, providing information for planning and implementing future birth cohort studies locally and internationally.

    Matched MeSH terms: Epidemiologic Studies*
  15. Daniels PW, Sendow I, Pritchard LI, Sukarsih, Eaton BT
    Vet. Ital., 2004 Jul-Sep;40(3):94-100.
    PMID: 20419642
    Structured epidemiological studies based on sentinel herds in Indonesia and Malaysia have provided much information regarding the bluetongue (BT) viruses (BTV) and their likely vectors in South-East Asia. Serotypes 1, 2, 3, 7, 9, 12, 16, 21 and 23 have been isolated. Molecular analyses show all group within the Australasian topotype, with four genotypic sub-groupings identified to date. There are relationships to isolates from both India and Australia. Strains of BTV in South-East Asia do not appear to be highly virulent, since BT disease is not seen in local sheep. Known vector species identified include Culicoides fulvus, C. actoni, C. wadai and C. brevitarsis. C. imicola has not been identified in Malaysian or Indonesian studies. Molecular analyses indicate movement of South-East Asian strains of BTV into northern Australia, and the gradation in observations between India and eastern Australia regarding serotype, genotype, virulence and vector species suggests movement along a conceptual gradient through South-East Asia.
    Matched MeSH terms: Epidemiologic Studies
  16. Tay AK, Mohsin M, Hau KM, Badrudduza M, Balasundaram S, Morgan K, et al.
    Psychol Med, 2020 Sep 11.
    PMID: 32914737 DOI: 10.1017/S0033291720003104
    BACKGROUND: Large variations in prevalence rates of common mental disorder (CMD) amongst refugees and forcibly displaced populations have raised questions about the accuracy and value of epidemiological surveys in these cross-cultural settings. We examined the associations of sociodemographic indices, premigration traumatic events (TEs), postmigration living difficulties (PMLDs), and psychosocial disruptions based on the Adaptive Stress Index (ASI) in relation to CMD prevalence amongst the Rohingya, Chin and Kachin refugees originating from Myanmar and relocated to Malaysia.

    METHODS: Parallel epidemiological studies were conducted in areas where the three groups were concentrated in and around Malaysia (response rates: 80-83%).

    RESULTS: TE exposure, PMLDs and ASI were significantly associated with CMD prevalence in each group but the Rohingya recorded the highest exposure to all three of these former indices relative to Chin and Kachin (TE: mean = 11.1 v. 8.2 v. 11; PMLD: mean = 13.5 v. 7.4 v. 8.7; ASI: mean = 128.9 v. 32.1 v. 35.5). Multiple logistic regression analyses based on the pooled sample (n = 2058) controlling for gender and age, found that ethnic group membership, premigration TEs (16 or more TEs: OR, 2.00; 95% CI, 1.39-2.88; p < 0.001), PMLDs (10-15 PMLDs: OR, 4.19; 95% CI, 3.17-5.54; 16 or more PMLDs: OR, 7.23; 95% CI, 5.24-9.98; p < 0.001) and ASI score (ASI score 100 or greater: OR, 2.19; 95% CI, 1.46-3.30; p < 0.001) contributed to CMD.

    CONCLUSIONS: Factors specific to each ethnic group and differences in the quantum of exposure to TEs, PMLDs and psychosocial disruptions appeared to account in large part for differences in prevalence rates of CMDs observed across these three groups.

    Matched MeSH terms: Epidemiologic Studies
  17. Idayu Badilla Idris
    Int J Public Health Res, 2017;7(2):829-835.
    MyJurnal
    Emotional and behavioural problems among children have been increasing in many western as
    well as the eastern countries. Although the problem has been given attention and priority in
    terms of early detection, many children with early symptoms of emotional and behavioural
    problems has still not been detected at the early stages. This phenomenon is worrying as mental
    health problems were shown to be stable in the long run and if left undetected it may manifest
    into various problems in adulthood. This paper explores the issues on emotional and
    behavioural problems in terms of its definition, prevalence, aetiology, long term consequences
    and treatment. It also explores on mental health problems in a non-western country, i.e.
    Malaysia including its prevalence and intervention strategies which has been carried out in
    overcoming this worrying issue. Finally this review paper stresses the importance of providing
    a well-designed epidemiological study in Malaysia in assessing the current prevalence of
    emotional and behavioural problems in young children and adolescent
    Matched MeSH terms: Epidemiologic Studies
  18. Lekko YM, Ooi PT, Omar S, Mazlan M, Ramanoon SZ, Jasni S, et al.
    Vet World, 2020 Sep;13(9):1822-1836.
    PMID: 33132593 DOI: 10.14202/vetworld.2020.1822-1836
    Tuberculosis (TB) is a chronic inflammatory and zoonotic disease caused by Mycobacterium tuberculosis complex (MTBC) members, which affects various domestic animals, wildlife, and humans. Some wild animals serve as reservoir hosts in the transmission and epidemiology of the disease. Therefore, the monitoring and surveillance of both wild and domestic hosts are critical for prevention and control strategies. For TB diagnosis, the single intradermal tuberculin test or the single comparative intradermal tuberculin test, and the gamma-interferon test, which is regarded as an ancillary test, are used. Postmortem examination can identify granulomatous lesions compatible with a diagnosis of TB. In contrast, smears of the lesions can be stained for acid-fast bacilli, and samples of the affected organs can be subjected to histopathological analyses. Culture is the gold standard test for isolating mycobacterial bacilli because it has high sensitivity and specificity compared with other methods. Serology for antibody detection allows the testing of many samples simply, rapidly, and inexpensively, and the protocol can be standardized in different laboratories. Molecular biological analyses are also applicable to trace the epidemiology of the disease. In conclusion, reviewing the various techniques used in MTBC diagnosis can help establish guidelines for researchers when choosing a particular diagnostic method depending on the situation at hand, be it disease outbreaks in wildlife or for epidemiological studies. This is because a good understanding of various diagnostic techniques will aid in monitoring and managing emerging pandemic threats of infectious diseases from wildlife and also preventing the potential spread of zoonotic TB to livestock and humans. This review aimed to provide up-to-date information on different techniques used for diagnosing TB at the interfaces between wildlife, livestock, and humans.
    Matched MeSH terms: Epidemiologic Studies
  19. Jones SU, Chua KH, Chew CH, Yeo CC, Abdullah FH, Othman N, et al.
    PeerJ, 2021;9:e11195.
    PMID: 33889447 DOI: 10.7717/peerj.11195
    Background: Staphylococcus aureus is one of the important pathogens causing nosocomial infection. spa typing allows identification of S. aureus clones in hospital isolates and is useful for epidemiological studies and nosocomial infection control. This study aims to investigate the spa types in Malaysian S. aureus isolates obtained from various clinical specimens.

    Method: A total of 89 methicillin-resistant S. aureus (MRSA) [pus (n = 55), blood (n = 27), respiratory (n = 5), eye (n = 2)] isolates and 109 methicillin-susceptible S. aureus (MSSA) [pus (n = 79), blood (n = 24), respiratory (n = 3), eye (n = 2) and urine (n = 1)] isolates were subjected to spa typing with sequences analysed using BioNumerics version 7.

    Results: The spa sequence was successfully amplified from 77.8% of the strains (154/198) and 47 known spa types were detected. The distribution of known spa types in MRSA (36.2%, 17/47) was less diverse than in MSSA (70.2%, 33/47). The most predominant spa types were t032 (50%) in MRSA, and t127 (19%) and t091 (16.7%) in MSSA, respectively. spa type t091 in MSSA was significantly associated with skin and soft tissue infections (p = 0.0199).

    Conclusion: The previously uncommon spa type t032 was detected in the Malaysian MRSA strains, which also corresponded to the most common spa type in Europe and Australia, and has replaced the dominant spa type t037 which was reported in Malaysia in 2010.

    Matched MeSH terms: Epidemiologic Studies
  20. Esa, R., Razak, I.A.
    Ann Dent, 1996;3(1):-.
    MyJurnal
    In Malaysia the School Dental Service (SDS) provides comprehensive dental treatment with the aim of rendering the child dentally fit before leaving primary school at 12 years. Hence the purpose of this study was to investigate I) the prevalence and treatment needs of traumatised permanent incisors and 2) to assess their relationship to the degree of incisor overjet amongst 12-13 year-old schoolchildren. The sample comprised of 1519 schoolchildren attending 20 secondary government and government-aided schools in Klang district. There were 772 boys and 747 girls. The sampling procedure involved a multistage, clustered and stratified random sampling. The prevalence of traumatic injuries in permanent incisors was 2.6% which confirmed the results of a previous local study. Boys suffered more trauma than girls with a ratio of about 1.5:I. A majority (77.5% ) of the children had one tooth affected. The most commonly affected teeth were the upper central incisors (91.8%) followed by the lower central incisors (4.1%). A high percentage (57.5%) of children with traumatised anterior teeth had increased overjet (>3mm). Almost all cases (93.9%) required two or more surface fillings. However the majority of affected children (56%) were satisfied with their appearance. It is concluded that traumatic dental injuries should be incorporated as part of the treatment plan for the SDS and appropriately managed soon after occurrence or not later than 12 years after which they leave the SDS. Future epidemiological studies should also give due emphasis to the relative importance of traumatised teeth in children.
    Matched MeSH terms: Epidemiologic Studies
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