Browse publications by year: 2021

  1. Pandey AK, Reji Kumar R, B K, Laghari IA, Samykano M, Kothari R, et al.
    J Environ Manage, 2021 Nov 01;297:113300.
    PMID: 34293672 DOI: 10.1016/j.jenvman.2021.113300
    This article offers a trend of inventions and implementations of photocatalysis process, desalination technologies and solar disinfection techniques adapted particularly for treatment of industrial and domestic wastewater. Photocatalysis treatment of wastewater using solar energy is a promising renewable solution to reduce stresses on global water crisis. Rendering to the United Nation Environment Programme, 1/3 of world population live in water-stressed countries, while by 2025 about 2/3 of world population will face water scarcity. Major pollutants exhibited from numerous sources are critically discussed with focus on potential environmental impacts & hazards. Treatment of wastewater by photocatalysis technique, solar thermal electrochemical process, solar desalination of brackish water and solar advanced oxidation process have been presented and systematically analysed with challenges. Both heterogenous and homogenous photocatalysis techniques employed for wastewater treatment are critically reviewed. For treating domestic wastewater, solar desalination technologies adopted for purifying brackish water into potable water is presented along with key challenges and remedies. Advanced oxidation process using solar energy for degradation of organic pollutant is an important technique to be reviewed due to their effectiveness in wastewater treatment process. Present article focused on three key issues i.e. major pollutants, wastewater treatment techniques and environmental benefits of using solar power for removal of pollutants. The review also provides close ideas on further research needs and major concerns. Drawbacks associated with conventional wastewater treatment options and direct solar energy-based wastewater treatment with energy storage systems to make it convenient during day and night both listed. Although, energy storage systems increase the overall cost of the wastewater treatment plant it also increases the overall efficiency of the system on environmental cost. Cost-efficient wastewater treatment methods using solar power would significantly ensure effective water source utilization, thereby contributing towards sustainable development goals.
    MeSH terms: Solar Energy*; Sunlight; Water; Water Purification*; Waste Water
  2. Misron K, Tengku Kamalden TMI, Misron LH, Devesahayam PR, Misron SNF
    Cochlear Implants Int, 2021 09;22(5):291-295.
    PMID: 33794747 DOI: 10.1080/14670100.2021.1905975
    INTRODUCTION: Cochlear implant (CI) requires lifelong financial commitments to ensure that the devices always operate optimally.

    OBJECTIVE: We estimated the long-term maintenance costs of CI including repair of speech processors, replacement of damaged parts, and battery requirements.

    RESULTS: Forty-one parents of children who received CIs in Malaysian government hospitals were enrolled. The first 2 years of CI usage were covered by warranty. The cost increased three-fold from by 4 years of CI usage and then doubled by 8 years of usage. About 75% of parents commented that the costs were burdensome.

    CONCLUSION: Our findings will be useful for parents whose children receive CI and will allow medical personnel to counsel the parents about the costs.

    MeSH terms: Child; Cochlear Implants*; Humans; Malaysia; Parents; Surveys and Questionnaires; Speech Perception*; Cochlear Implantation*
  3. Walter KV, Conroy-Beam D, Buss DM, Asao K, Sorokowska A, Sorokowski P, et al.
    Proc Biol Sci, 2021 Jul 28;288(1955):20211115.
    PMID: 34284630 DOI: 10.1098/rspb.2021.1115
    A wide range of literature connects sex ratio and mating behaviours in non-human animals. However, research examining sex ratio and human mating is limited in scope. Prior work has examined the relationship between sex ratio and desire for short-term, uncommitted mating as well as outcomes such as marriage and divorce rates. Less empirical attention has been directed towards the relationship between sex ratio and mate preferences, despite the importance of mate preferences in the human mating literature. To address this gap, we examined sex ratio's relationship to the variation in preferences for attractiveness, resources, kindness, intelligence and health in a long-term mate across 45 countries (n = 14 487). We predicted that mate preferences would vary according to relative power of choice on the mating market, with increased power derived from having relatively few competitors and numerous potential mates. We found that each sex tended to report more demanding preferences for attractiveness and resources where the opposite sex was abundant, compared to where the opposite sex was scarce. This pattern dovetails with those found for mating strategies in humans and mate preferences across species, highlighting the importance of sex ratio for understanding variation in human mate preferences.
    MeSH terms: Animals; Choice Behavior; Female; Humans; Male; Marriage; Reproduction; Sex Characteristics*; Sex Ratio*; Sexual Partners
  4. Edgar S, Abdul-Aziz NA, Loh EC, Capelle D, Goh KJ, Latif LA, et al.
    Neurodegener Dis Manag, 2021 08;11(4):307-314.
    PMID: 34284643 DOI: 10.2217/nmt-2021-0004
    Aim: To investigate the patients' perception of their disease, its management and the impact of the COVID-19 pandemic on persons living with amyotrophic lateral sclerosis (ALS) in Malaysia. Patients & methods: An online survey comprising 42 questions was conducted on ALS patients during the peak of the COVID-19 pandemic. Results: Responses were received from 37/60 (62%) participants with ALS directly or through their caregivers. During the COVID-19 pandemic, two-thirds of patients were negatively impacted by the sudden disruption to their hospital appointments, rehabilitation sessions and reduced social interactions. Conclusion: This study provided insight into patients' perception of their care and management of ALS in Malaysia which will facilitate in implementing changes that can improve care to persons living with this devastating illness.
  5. Lew PH, Rahman MT, Safii SH, Baharuddin NA, Bartold PM, Sockalingam S, et al.
    BMC Oral Health, 2021 07 20;21(1):360.
    PMID: 34284769 DOI: 10.1186/s12903-021-01712-y
    BACKGROUND: Previous studies have reported conflicting findings between serum anti-citrullinated protein antibodies (ACPA) levels in rheumatoid arthritis (RA) participants with and without periodontitis (Pd). This study aimed to analyse possible correlations between serum ACPA levels and clinical parameters in Pd and RA participants.

    METHODS: Full mouth periodontal examination (probing pocket depth, clinical attachment levels, gingival bleeding index, visual plaque index) was conducted and serum samples obtained from 80 participants comprising RA, Pd, both RA and Pd (RAPd) and healthy individuals (HC). Erythrocyte sedimentation rates (ESR) and periodontal inflamed surface area (PISA) were obtained. Serum samples were analysed for ACPA quantification using enzyme-linked immunosorbent assay (ELISA).

    RESULTS: Median levels (IU/mL) of ACPA (interquartile range, IQR) in RAPd, RA, Pd and HC groups were 118.58(274.51), 102.02(252.89), 78.48(132.6) and 51.67(91.31) respectively. ACPA levels were significantly higher in RAPd and RA as compared to HC group (p  RA > Pd > HC. However, lack of any significant correlation between the serum ACPA levels with the clinical Pd and RA parameters warrants further studies to investigate the causal link between RA and Pd for such a trend. Further studies involving more inflammatory biomarkers might be useful to establish the causal link between Pd in the development and progression of RA or vice versa.

    MeSH terms: Arthritis, Rheumatoid*; Cross-Sectional Studies; Humans; Periodontitis*; Random Amplified Polymorphic DNA Technique
  6. Plesons M, Travers E, Malhotra A, Finnie A, Maksud N, Chalasani S, et al.
    Reprod Health, 2021 Jul 20;18(1):152.
    PMID: 34284797 DOI: 10.1186/s12978-021-01176-x
    Over the past 25 years, tremendous progress has been made in increasing the evidence on child marriage and putting it to good use to reduce the prevalence of child marriage and provide support to married girls. However, there is still much to be done to achieve the Sustainable Development Goal target 5.3 of ending child marriage by 2030, and to meet the needs of the 12 million girls who are still married before age 18 each year. To guide and stimulate future efforts, the UNDP-UNFPA-UNICEF-WHO-World Bank Special Programme of Research, Development and Research Training in Human Reproduction, the World Health Organization, the UNICEF-UNFPA Global Programme to End Child Marriage, and Girls Not Brides: The Global Partnership to End Child Marriage convened an expert group meeting in 2019 to: (1) review the progress made in building the evidence base on child marriage since the publication of research priorities in this area in 2015, (2) identify an updated set of research priorities for the next ten years, and (3) discuss how best to support research coordination, translation, and uptake. This article provides a summary of the progress made in this area since 2015 and lists an updated set of research gaps and their rationale in four key areas: (1) prevalence, trends, determinants, and correlates of child marriage; (2) consequences of child marriage; (3) intervention effectiveness studies to prevent child marriage and support married girls; and (4) implementation research studies to prevent child marriage and support married girls. It also highlights a number of calls-to-action around research coordination and knowledge translation to support the emerging and evolving needs of the field.
    MeSH terms: Adolescent; Child; Family*; Female; Humans; Marriage*; World Health Organization
  7. Osterrieder A, Cuman G, Pan-Ngum W, Cheah PK, Cheah PK, Peerawaranun P, et al.
    BMJ Open, 2021 Jul 20;11(7):e046863.
    PMID: 34285007 DOI: 10.1136/bmjopen-2020-046863
    OBJECTIVES: To understand the impact of COVID-19 and public health measures on different social groups, we conducted a mixed-methods study in five countries ('SEBCOV-social, ethical and behavioural aspects of COVID-19'). Here, we report the results of the online survey.

    STUDY DESIGN AND STATISTICAL ANALYSIS: Overall, 5058 respondents from Thailand, Malaysia, the UK, Italy and Slovenia completed the self-administered survey between May and June 2020. Poststratification weighting was applied, and associations between categorical variables assessed. Frequency counts and percentages were used to summarise categorical data. Associations between categorical variables were assessed using Pearson's χ2 test. Data were analysed in Stata 15.0 RESULTS: Among the five countries, Thai respondents reported having been most, and Slovenian respondents least, affected economically. The following factors were associated with greater negative economic impacts: being 18-24 years or 65 years or older; lower education levels; larger households; having children under 18 in the household and and having flexible/no income. Regarding social impact, respondents expressed most concern about their social life, physical health, mental health and well-being.There were large differences between countries in terms of voluntary behavioural change, and in compliance and agreement with COVID-19 restrictions. Overall, self-reported compliance was higher among respondents who self-reported a high understanding of COVID-19. UK respondents felt able to cope the longest and Thai respondents the shortest with only going out for essential needs or work. Many respondents reported seeing news perceived to be fake, the proportion varying between countries, with education level and self-reported levels of understanding of COVID-19.

    CONCLUSIONS: Our data showed that COVID-19 and public health measures have uneven economic and social impacts on people from different countries and social groups. Understanding the factors associated with these impacts can help to inform future public health interventions and mitigate their negative consequences.

    TRIAL REGISTRATION NUMBER: TCTR20200401002.

    MeSH terms: Child; Cross-Sectional Studies; Great Britain; Humans; Italy; Malaysia; Surveys and Questionnaires; Social Change*; Thailand; Slovenia
  8. Chuan A, Jeyaratnam B, Fathil S, Ferraro LH, Kessow A, Lim YC, et al.
    Reg Anesth Pain Med, 2021 10;46(10):867-873.
    PMID: 34285116 DOI: 10.1136/rapm-2021-102934
    BACKGROUND AND OBJECTIVES: While there are several published recommendations and guidelines for trainees undertaking subspecialty Fellowships in regional anesthesia, a similar document describing a core regional anesthesia curriculum for non-fellowship trainees is less well defined. We aimed to produce an international consensus for the training and teaching of regional anesthesia that is applicable for the majority of worldwide anesthesiologists.

    METHODS: This anonymous, electronic Delphi study was conducted over two rounds and distributed to current and immediate past (within 5 years) directors of regional anesthesia training worldwide. The steering committee formulated an initial list of items covering nerve block techniques, learning objectives and skills assessment and volume of practice, relevant to a non-fellowship regional anesthesia curriculum. Participants scored these items in order of importance using a 10-point Likert scale, with free-text feedback. Strong consensus items were defined as highest importance (score ≥8) by ≥70% of all participants.

    RESULTS: 469 participants/586 invitations (80.0% response) scored in round 1, and 402/469 participants (85.7% response) scored in round 2. Participants represented 66 countries. Strong consensus was reached for 8 core peripheral and neuraxial blocks and 17 items describing learning objectives and skills assessment. Volume of practice for peripheral blocks was uniformly 16-20 blocks per anatomical region, while ≥50 neuraxial blocks were considered minimum.

    CONCLUSIONS: This international consensus study provides specific information for designing a non-fellowship regional anesthesia curriculum. Implementation of a standardized curriculum has benefits for patient care through improving quality of training and quality of nerve blocks.

  9. Bui DT, Panahi M, Shahabi H, Singh VP, Shirzadi A, Chapi K, et al.
    Sci Rep, 2021 Jul 20;11(1):15152.
    PMID: 34285263 DOI: 10.1038/s41598-021-93957-4
  10. Chan CMH, Siau CS, Wong JE, Wee LH, Jamil NA, Hoe VCW
    Nat Sci Sleep, 2021;13:1109-1116.
    PMID: 34285616 DOI: 10.2147/NSS.S295537
    Introduction: Given the scarcity of data on sleep insufficiency in developing countries and its emerging importance in public health, this study aims to provide the prevalence and factors associated with insufficient sleep among working Malaysian adults.

    Materials and Methods: A total of 11,356 working adults (≥18 years) were recruited from a cross-sectional online health and work survey. Sleep duration was self-reported and was categorised as insufficient sleep (<7 h) and sufficient sleep (≥7 h) based on the National Sleep Guidelines' daily sleep time recommendation for adults. The 10-item Kessler scale was used to assess psychological distress levels (cutoff score ≥20). Bivariate and multivariable regression analyses were performed to examine the factors associated with insufficient sleep.

    Results: The mean age of the participants was 35.7 years (standard deviation, SD±9.2). There were more female (n=6613; 58.2%) respondents. The mean sleep duration was 6.49 h (SD±1.10). A total of 6212 individuals (54.7%) reported getting <7 h of sleep daily. After adjusting for gender, marital status and educational attainment, older age (odds ratio, OR=2.22, 95% confidence interval, 95% CI: 1.72-2.86), ever smoking (OR=1.38, 95% CI: 1.25-1.53), and high psychological distress (OR=1.33, 95% CI: 1.17-1.53) were found to be associated with insufficient sleep. Factors associated with sleep duration of <7 h per night included having children (OR=1.35, 95% CI: 1.21-1.50), lifestyle factors (OR=1.38, 95% CI: 1.25-1.53), poor sleeping conditions (OR=1.21, 95% CI: 1.07-1.36), and mental health issues (OR=1.32, 95% CI: 1.12-1.54).

    Discussion and Conclusion: More than half of the participants reported sleep insufficiency. Older age, ever smoking, and high levels of psychological distress were significantly associated with insufficient sleep. Our findings recognise sleep as an emerging public health issue. Smoking cessation programmes and addressing high psychological distress may be beneficial to improve sleep.

  11. Jamal ARA
    Malays J Med Sci, 2021 Jun;28(3):1-4.
    PMID: 34285640 DOI: 10.21315/mjms2021.28.3.1
    Precision medicine is transforming healthcare worldwide and aims to improve the effectiveness of management of many diseases including cancers, other non-communicable diseases (NCDs) and also rare diseases. Precision medicine takes into account the individual patient's genetic, environment and lifestyle data. Developed nations are already embarking on precision medicine initiatives including the 100,000 Genomes England and the Precision Medicine Initiative in the United States (US). The Academy of Sciences Malaysia, the Ministry of Health and the Ministry of Higher Education are working together to put forward a precision medicine initiative for Malaysia. The key drivers that must be put in place include a strong policy agenda, a national large scale genome sequencing project and with it a national genome database, the implementation of the electronic medical record (EMR) system, a payment and reimbursement system to cover for the genetic testing and the targeted treatment, and putting in place an ecosystem that will support precision medicine. Relevant guidelines and Acts will also need to be developed especially with regard to privacy and confidentiality. The future of precision medicine is now and this will certainly bring better outcome and value to the patients.
  12. Ghafoor S
    Malays J Med Sci, 2021 Jun;28(3):5-17.
    PMID: 34285641 DOI: 10.21315/mjms2021.28.3.2
    Prelabour rupture of membranes (PROM) refers to the disruption of foetal membranes before the onset of labour, resulting in the leakage of amniotic fluid. PROM complicates 3% and 8% of preterm and term pregnancies, respectively. Accurate and timely diagnosis is crucial for effective management to prevent adverse maternal- and foetal-outcomes. The diagnosis of equivocal PROM cases with traditional methods often becomes challenging in current obstetrics practice; therefore, various novel biochemical markers have emerged as promising diagnostic tools. This narrative review is sought to review the published data to understand the current and emerging trends in diagnostic modalities in term and preterm pregnancies complicated with PROM and the potential role of various markers for predicting preterm PROM (pPROM) and chorioamnionitis in women with pPROM.
  13. Che Abdul Rahim N, Manjit Singh JS, Pardi M, Zainuddin AA, Salleh R
    Malays J Med Sci, 2021 Jun;28(3):18-45.
    PMID: 34285642 DOI: 10.21315/mjms2021.28.3.3
    The current COVID-19 pandemic remains severe. There is no doubt that the COVID-19 pandemic is affecting every aspect of our lives. Currently, the spread of inaccurate information or fake news on the internet to the public is causing the community to panic. Thus, this study aims to obtain available information on food and nutrition related to the prevention and treatment of COVID-19 from various sources. A scoping review framework was used to chart the evidence on nutritional recommendations to prevent COVID-19 based on the preferred method in reporting systematic review and meta-analysis extension for scoping reviews (PRISMA-ScR). The articles were categorised into three main groups: i) general dietary recommendations; ii) supplementation with specific micronutrients and iii) their mixtures and supplementation with traditional herbs and miscellaneous foods. A total of 60 articles met the inclusion criteria and were used in the review. This scoping review demonstrates that there is no miracle cure, food or supplement that can cure or prevent COVID-19. Currently, there is no confirmed treatment or vaccine for the disease. Practicing healthy eating habits is the best nutritional recommendation during the pandemic. Hence, this review hopefully will provide evidence-based nutrition recommendations that are available for current COVID-19 treatment. We hope that the authorities can inform the public and media to stop the spread of nutrition pseudoscience in the wake of the COVID-19 pandemic.
  14. Koh V, Ali S, Hassan MH, Mokhtar AM, Yaacob MNM, Mazlan MZ
    Malays J Med Sci, 2021 Jun;28(3):46-55.
    PMID: 34285643 DOI: 10.21315/mjms2021.28.3.4
    Background: This study aims to compare the effect of infusions of two agents, dexmedetomidine and esmolol, with the control group in attenuating the haemodynamic stress response and neuroendocrine modulation surrogated by capillary blood glucose (BG) during the procedures.

    Methods: Sixty patients aged 18-70 years old who underwent elective surgeries involving endotracheal intubation were randomised into three groups of equal size: i) control; ii) dexmedetomidine and iii) esmolol. Heart rate (HR) was measured at baseline (T0), after drug administration (T1), after induction of anaesthesia (T2), immediately after intubation (T3), and 3 min, 5 min and 10 min after intubation (T4, T5 and T6). BG was measured pre-operatively and 30 min post-intubation.

    Results: Two-way repeated-measures analysis of variance showed significant time [within-group changes, F(3.2, 182.5) = 30.39, P < 0.001], treatment [between-group differences regardless of time, F(2, 57) = 50.24, P < 0.001] and interaction [between-group differences based on time, F(6.4, 182.5) = 37.65, P < 0.001] effects on HR. A significantly higher HR was observed in the control group compared to the dexmedetomidine and esmolol groups from T2 to T6. BG exhibited a significant time effect [F(1, 57) = 41.97, P < 0.001] with no significant treatment and interaction effects. All three groups showed a significant increase in BG from baseline.

    Conclusion: Both dexmedetomidine and esmolol are equally effective in attenuating haemodynamic responses to laryngoscopy and intubation. However, both do not significantly modulate neuroendocrine stress.

  15. Kasera GO, Maingi JM, Onyango OK, Nyamache AK
    Malays J Med Sci, 2021 Jun;28(3):56-64.
    PMID: 34285644 DOI: 10.21315/mjms2021.28.3.5
    Background: Hepatitis A and B causes morbidity and mortality among patients. This study determined the proportion of hepatitis A, B viruses (HAV, HBV) and genetic diversity of HBV among jaundice patients at the Coast General Hospital, Mombasa County, Kenya.

    Methods: A cross-sectional study was conducted among 222 patients; recruited and screened for hepatitis B surface antigen (HBsAg) and anti-HAV IgM. Viral deoxyribonucleic acid (DNA) was extracted from positive samples; partial hepatitis B virus-pol (HBV-pol) gene amplified, directly sequenced and generated sequences phylogenetically analysed using MEGA X software. Demographic characteristics were compared in relation to HBV infection using Chi-square.

    Results: Forty-seven (21.2%) out of the 222 patients tested positive for HBV while no HAV was detected. Among those infected, n = 8 (3.6%) were females and n = 39 (17.6%) males. Forty-five samples amplified and sequenced successfully. However, two samples failed to amplify. Phylogenetic analysis revealed HBV A1 genotype [n = 35 (74.5%)] was most predominant. A3, B and C2 genotypes each occurred [n = 1 (0.02%)]. This study revealed co-existence of HBV A3, B and C2 genotypes that have not yet been detected in this region.

    Conclusion: HBV A1 genotype remains the predominant genotypes in this region. The detected HBV prevalence indicates possible high transmission with possibility of increasing trends of HBV genotypes based on revelation of existence of new genotypes in this region.

  16. Abdullah AN, Ahmad AH, Zakaria R, Tamam S, Abdullah JM
    Malays J Med Sci, 2021 Jun;28(3):65-76.
    PMID: 34285645 DOI: 10.21315/mjms2021.28.3.6
    Background: Lesion studies have shown distinct roles for the hippocampus, with the dorsal subregion being involved in processing of spatial information and memory, and the ventral aspect coding for emotion and motivational behaviour. However, its structural connectivity with the subdivisions of the prefrontal cortex (PFC), the executive area of the brain that also has various distinct functions, has not been fully explored, especially in the Malaysian population.

    Methods: We performed diffusion magnetic resonance imaging with probabilistic tractography on four Malay males to parcellate the hippocampus according to its relative connection probability to the six subdivisions of the PFC.

    Results: Our findings revealed that each hippocampus showed putative connectivity to all the subdivisions of PFC, with the highest connectivity to the orbitofrontal cortex (OFC). Parcellation of the hippocampus according to its connection probability to the six PFC subdivisions showed variability in the pattern of the connection distribution and no clear distinction between the hippocampal subregions.

    Conclusion: Hippocampus displayed highest connectivity to the OFC as compared to other PFC subdivisions. We did not find a unifying pattern of distribution based on the connectivity-based parcellation of the hippocampus.

  17. Alahmri F, Alsaadi S, Ahsan M
    Malays J Med Sci, 2021 Jun;28(3):77-85.
    PMID: 34285646 DOI: 10.21315/mjms2021.28.3.7
    Background: The impact of asymptomatic pronation on proximal joints during motion has not been well understood, and research on it remains limited. Therefore, the current study determines the effect of asymptomatic pronation of the foot on hip joint kinematics during gait.

    Methods: Forty participants were recruited for the study (20 with asymptomatic pronated feet and 20 with non-pronated feet). Foot assessment was conducted by navicular drop and rear-foot angle tests. Hip joint kinematics were measured via MVN Xsens system 3D-motion capture from sagittal, frontal and transverse planes during gait. An independent t-test was used to identify differences in kinematic variables.

    Results: Both groups were similar in characteristics, and there were no significant differences between the groups in age (P = 0.674) and BMI (P = 0.459). However, there was a significant difference in arch height (P = 0.001) and rear-foot angle (P = 0.001). Our findings showed there were insignificant differences between the asymptomatic pronated foot and non-pronated foot control groups in hip joint kinematics of sagittal (P = 0.618), frontal (P = 0.276), and transverse (P = 0.337) planes during a full gait cycle.

    Conclusion: Patients with asymptomatic pronation of the foot and non-pronation of the foot showed similar movement patterns of hip kinematics in all three planes. The findings of the present study highlight the need for clinicians to consider foot alignment when examining patients with asymptomatic pronation of the foot and non-pronation of the foot.

  18. Tan PP, Chang CT, Abdul Rahman J, Mohd Noor S
    Malays J Med Sci, 2021 Jun;28(3):86-96.
    PMID: 34285647 DOI: 10.21315/mjms2021.28.3.8
    Objective: To develop and validate a questionnaire which evaluates the blood donors' satisfaction.

    Background: In Malaysia, blood procurement relies mainly on voluntary non-remunerated donors. Hence, it is important to ensure the satisfaction of the blood donors in order to increase retention.

    Methods: This study was conducted among blood donors who attended blood donation and understood the Malay language. Non-Malaysian and illiterate donors were excluded. The questionnaire was developed by the transfusion medicine team. Content validity was established by content reviewers, while face validity was examined in the cognitive debriefing stage. For the 18-item questionnaire, 90 respondents were required based on the 1:5 ratio. A retest was performed in two weeks' time.

    Results: One hundred and thirty-seven participants responded in the first phase, while 103 responded after two weeks. The five domains were: technical, interpersonal, accessibility/ convenience, physical experience and overall satisfaction. The Kaiser-Meyer-Olkin (KMO) value was 0.896, with significant Bartlett's Test of Sphericity (P < 0.001). The factor loadings ranged from 0.729 to 0.953. The Cronbach alpha values of the five domains ranged from 0.814 to 0.955 and the intraclass correlation coefficient ranged from 0.663 to 0.847.

    Conclusion: The Malaysian blood donor's satisfaction (M-BDS) questionnaire is a reliable and valid tool suitable for the assessment of blood donor's satisfaction in blood donation centres.

  19. Nikmat AW, Azhar ZI, Shuib N, Hashim NA
    Malays J Med Sci, 2021 Jun;28(3):97-104.
    PMID: 34285648 DOI: 10.21315/mjms2021.28.3.9
    Background: Geriatric Depression Scale (GDS) has been widely used in assessing depression in elderly population. Using the Ministry of Health Malaysia definition for elderly, this study aimed to examine the construct validity and reliability of the GDS (Malay version) in elderly with cognitive impairment in Malaysia.

    Methods: A cross-sectional validation study involving 219 elderlies with cognitive impairment was conducted using universal sampling method. Participants aged 60 years old and above, scored less than 11 for the short mini mental state examination (SMMSE), have sufficient command of the Malay or English language, residing in the government nursing homes and attending memory clinics in government hospitals in Klang Valley were sampled. The GDS-15 English version underwent adaptation, translation, face validation and field testing to produce the Malay version. Psychometric analysis was performed using the exploratory factor analysis and its internal consistency was examined.

    Results: Mean age of participants were 72.61 ± 7.79. Majority were male (50.7%), Malay (50.2%), studied at least until primary school (71.7%) and stayed at nursing homes (50.2%). Construct validity showed significant Bartlett's test of sphericity (Chi-square = 1,340.058, P < 0.001) and Kaiser-Meyer-Olkin (KMO) test of 0.90. Factor loadings for each item in the depression domain were satisfactory ranging from 0.42 to 0.83. Factor loadings for each item in the psychosocial activities' domain were satisfactory ranging from 0.53 to 0.76. For the questionnaire reliability analysis, the total Cronbach's alpha for the final model was satisfactory, with and overall Cronbach's alpha of 0.89. Cronbach's alpha value for the depression and psychosocial activities domain was 0.861 and 0.80, respectively.

    Conclusion: The GDS (Malay version) is a valid and reliable tool to screen for depression in elderly with cognitive impairment.

  20. Maramis MM, Setiawati Y, Febriyanti N, Fitriah M, Atika, Salim R, et al.
    Malays J Med Sci, 2021 Jun;28(3):105-117.
    PMID: 34285649 DOI: 10.21315/mjms2021.28.3.10
    Background: Playing angklung, an Indonesian traditional musical instrument and practicing silence have been shown to exert beneficial effects on emotion and cognition; the mechanism of such an effect possibly involve oxytocin. To date, only a few clinical and biomolecular studies have investigated the effects of playing angklung and practicing silence. This study aimed to examine the effects of playing angklung and practicing silence on human emotion and cognition and on oxytocin levels.

    Methods: This experimental study involved 61 Fourth Grade students from Surabaya, East Java, Indonesia. The participants were divided into two groups: the angklung intervention group and silence intervention group. The two interventions were performed for 15 min before the morning classes for 2 months. The control group attended their classes as usual. Clinical parameters, namely, emotion and cognition, as well as the saliva oxytocin levels were measured.

    Results: No significant differences were observed among the three groups in terms of concentration and cognitive flexibility. However, changes in oxytocin levels significantly differed among the three groups (P < 0.001) and the oxytocin levels were highest in the silence intervention group.

    Conclusion: Practicing silence significantly increased the oxytocin levels, but it did not elicit changes in cognitive function and emotion of the students.

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