Browse publications by year: 2025

  1. Ilhami S, Rahman SNSA, Iqhrammullah M, Hamid Z, Chai YH, Lam MK
    Biotechnol Adv, 2025;79:108529.
    PMID: 39922510 DOI: 10.1016/j.biotechadv.2025.108529
    Microalgae have emerged as a promising and sustainable source for polyhydroxyalkanoates (PHA), which are increasingly recognized for their potential in bioplastics production. However, the widespread application of microalgae-derived PHA faces challenges related to economic feasibility and scalability. This review provides a comprehensive analysis of recent advancements in the cultivation and optimization of microalgae for PHA production, highlighting the critical role of nutrient limitation, particularly nitrogen and phosphorus, in enhancing PHA accumulation. This review also explores the effectiveness of various cultivation systems, including autotrophic, heterotrophic, and mixotrophic approaches, in maximizing PHA yields. Environmental factors such as light intensity, salinity, and pH are examined for their influence on PHA synthesis pathways. Additionally, it identifies key technical and economic challenges that must be addressed to commercialize microalgae-based bioplastics to fully harness the potential of microalgae in sustainable bioplastic production.
    MeSH terms: Biotechnology/methods; Nitrogen/metabolism; Plastics/metabolism; Plastics/chemistry
  2. Ding S, Yahaya MF, Abdul Rahman AR
    Sci Rep, 2025 Feb 08;15(1):4782.
    PMID: 39922851 DOI: 10.1038/s41598-025-87741-x
    Consumer psychology has been proven to have an essential influence on aesthetic preferences. Previous research on aesthetics focused on long-lasting product categories and was conducted at a single level. However, aesthetics is multidimensional, which has been overlooked. Our research is based on the unified model of aesthetics (UMA), which aims to investigate the unique contributions of the perceptual (unity, variety), cognitive (typicality, novelty), and social (connectedness, autonomy) levels to aesthetic preferences for packaging designs. The studies used soft drink packaging from the fast-moving consumer goods (FMCG) category as stimuli, and Chinese participants evaluated the packaging on a 7-point Likert scale. Study 1 shows that people gravitate toward safety over accomplishment and that connectedness, typicality, and unity are the main determinants of aesthetic pleasure. Study 2 added two scenarios: for "going to a very formal meeting," stimuli with unity, typicality, and connectedness could best induce aesthetic pleasure. For "going to a good friend's rave party," the novelty, autonomy, and variety of designs were the most pleasing. Furthermore, two studies showed that for the overall stimulus, unity consistently evoked more positive aesthetic preferences than variety. Overall, this research provides new insights into aesthetic influences at the perceptual, cognitive, and social levels in soft drink packaging and offers new perspectives on aesthetic preferences for new product development.
    MeSH terms: Adult; Carbonated Beverages*; Consumer Behavior*; Female; Humans; Male; Food Packaging/methods; Product Packaging/methods; Young Adult
  3. Rahim NH, Jalil MJ, Mubarak NM, Azmi IS, Anbuchezhiyan G
    Sci Rep, 2025 Feb 08;15(1):4789.
    PMID: 39922946 DOI: 10.1038/s41598-025-89399-x
    Epoxidized vegetable oils present a viable substitute for polymers derived from petroleum. This research focuses on the impact of a process parameter on the epoxidation of palm stearin when zeolite ZSM-5 is used as a catalyst. This study synthesized peracetic acid as the oxidizing agent by combining hydrogen peroxide and acetic acid, adjusting molar ratios relative to palm stearin. The optimal relative conversion oxirane (RCO) percentage reached 43.06% at 70 °C, 200 rpm stirring speed, and 0.8 g of catalyst. The acetic acid to palm stearin molar ratio was 1:1, and the hydrogen peroxide to palm stearin ratio was 0.5:1. Both palm stearin and its epoxide derivative have been studied using Fourier-transform infrared spectroscopy, showing the appearance of an oxirane ring at a wavenumber of 1240 cm⁻¹. Kinetic modelling demonstrates that the simulation and experiment show a reasonable discrepancy, considering several assumptions that have been made. After 100 iterations, the reaction rate constant obtained as follows: [Formula: see text] =0.01 mol⋅L-1⋅min-1, [Formula: see text] = 1.85 mol⋅L-1⋅min-1, [Formula: see text] = 29.90 mol⋅L- 1⋅min- 1, and [Formula: see text] = 0.04 mol⋅L-1⋅min-1.
  4. Nik Azis NM, Raja Abdullah RN, Mohamad Ayub MNA, Baharin B
    BMC Oral Health, 2025 Feb 08;25(1):209.
    PMID: 39923030 DOI: 10.1186/s12903-025-05478-5
    BACKGROUND: The oral health of military personnel is critical in ensuring their operational readiness and overall health. This cross-sectional study aimed to assess the oral health parameters, behaviours and impact profile among naval personnel stationed at a Malaysian naval base.

    METHODS: Participants first underwent oral health examinations to evaluate their plaque scores, bleeding scores, Community Periodontal Index of Treatment Needs (CPITN), and Decayed, Missing, and Filled Teeth (DMFT) index. Additionally, the oral health behaviours and oral health impact profiles of the participants were assessed through a structured questionnaire.

    RESULTS: A total of 176 naval personnel participated in the study. Overall, the findings indicate high levels of plaque (30.7%) and bleeding scores (39.6%) while the CPITN results showed a significant proportion of participants (52.1%) requiring advanced periodontal treatment (CPITN 3 or 4). The DMFT index highlighted a substantial burden of dental caries with a mean score of 4.59 ± 4.24, including untreated decay (1.15 ± 1.63). The assessment of oral health-related quality of life using the OHIP-14 revealed low scores among some participants, with a mean of 13.47 and a maximum score of 42. Additionally, oral health behaviours were generally inadequate, with 12% of participants reporting infrequent brushing and 68.2% indicating limited use of interdental aids.

    CONCLUSIONS: Oral diseases were highly prevalent among the selected population, with notable deficiencies in oral health behaviours such as toothbrushing frequency, the use of interdental cleaning aids, and tongue cleaning. Oral health issues also significantly impacted daily life, as evidenced by the OHIP-14 scores. These findings highlight the need for tailored oral health interventions within the naval setting to enhance deployment readiness, improve oral health outcomes, and elevate the quality of life for naval personnel.

    CLINICAL TRIAL NUMBER: Not applicable.

    MeSH terms: Adolescent; Adult; Cross-Sectional Studies; Dental Plaque Index; DMF Index*; Female; Health Status*; Humans; Malaysia; Male; Oral Hygiene/statistics & numerical data; Periodontal Diseases/epidemiology; Periodontal Index*; Quality of Life*; Toothbrushing/statistics & numerical data; Health Behavior*; Sickness Impact Profile; Young Adult
  5. Jiang W, Weibang Pan, Cai T, Lee Z, Lv G, Bai Y, et al.
    Clin Nutr, 2025 Mar;46:147-154.
    PMID: 39922096 DOI: 10.1016/j.clnu.2025.01.029
    BACKGROUND: It remains unclear if early enteral nutrition benefits patients with circulatory shock, particularly in those with prolonged use of vasopressors. This study aimed to assess the association between early enteral nutrition and clinical outcomes in patients with circulatory shock and whether the duration of circulatory shock (transient or persistent) impacts this association.

    METHODS: Using data from a multicenter, cluster-randomized controlled trial, this secondary analysis involved patients with baseline circulatory shock as defined by a cardiovascular Sequential Organ Failure Assessment score of two or more. Patients were dichotomized into transient or persistent circulatory shock depending on the duration, while transient circulatory shock was defined by the resolution of shock within the first day of enrollment. Early enteral nutrition was defined as the initiation of enteral nutrition within 48 h after intensive care unit admission. The association between early enteral nutrition and a composite outcome (presence of any organ failure on study day 10 or 28-day mortality) was investigated by multivariable and propensity-score-weighted multivariable logistic regression analyses.

    RESULTS: Seven hundred and eighty-five patients were included in the analysis, and early enteral nutrition was administered to 385 patients (49.0 %) in the whole study cohort. In patients with transient circulatory shock (n = 527), 221 patients (41.9 %) received early enteral nutrition, and in those with persistent circulatory shock (n = 258), 164 patients (63.6 %) did so. For the overall cohort, there was no difference in the incidence of primary composite outcome between early enteral nutrition and 'no early enteral nutrition ' groups (adjusted odd ratio 0.84, 95 % confidence interval 0.60-1.18) after adjustment for potential confounders. In patients with transient circulatory shock, receipt of early enteral nutrition, compared to no early enteral nutrition, was significantly associated with reduced incidence of the composite outcome (adjusted odd ratio 0.63, 95 % confidence interval 0.41-0.95, p = 0.027). On the contrary, there is no association between early enteral nutrition and the incidence of the composite outcome in patients with persistent circulatory shock (adjusted odd ratio 1.28, 95 % confidence interval 0.64-2.58, p = 0.485). The results of propensity-weighted multivariable analysis conform to the primary analysis.

    CONCLUSION: Early enteral nutrition was associated with improved clinical outcomes among patients with circulatory shock that resolved within the first day. RESEARCH REGISTRATION UNIQUE IDENTIFYING NUMBER (UIN) OF THE ORIGINAL NEED TRIAL: ISRCTN Registry, Registry number: ISRCTN12233792.

    MeSH terms: Aged; Female; Humans; Intensive Care Units; Male; Middle Aged; Time Factors; Treatment Outcome; Organ Dysfunction Scores
  6. Patikorn C, Tan CJ, Cho JY, Khuntha S, Ha NT, Noviyani R, et al.
    Value Health, 2025 Apr;28(4):582-590.
    PMID: 39922297 DOI: 10.1016/j.jval.2025.01.012
    OBJECTIVES: This landscape analysis aimed to summarize the role of health equity in the health technology assessment (HTA) process (topic nomination, topic prioritization, assessment, appraisal, and decision making) in Asia.

    METHODS: A comprehensive literature review was conducted, followed by in-depth interviews with key informants. Content analysis was performed to summarize the role of health equity in HTA in 13 health systems in Asia, including Brunei Darussalam, Cambodia, China, Indonesia, Japan, Malaysia, Myanmar, Philippines, Singapore, South Korea, Taiwan, Thailand, and Vietnam.

    RESULTS: Health equity was reported to be considered in most health systems' HTA processes, except for Cambodia and Myanmar, which do not have an established HTA process. Interviews revealed that health equity has been more frequently considered to address the unmet medical needs of specific diseases (eg, high disease burden or severity, rare diseases, cancer, and diseases affecting children and the elderly) in Brunei Darussalam, China, Japan, Malaysia, Singapore, South Korea, Taiwan, Thailand, and Vietnam or inequities in socially disadvantaged groups (eg, socioeconomic status and geographical location) in Indonesia and the Philippines. Equity-informative economic evaluation was still in the early stages, with only 3 health systems reporting their use.

    CONCLUSIONS: Health equity is considered in the HTA process in most Asian health systems. However, quantitative evaluation of health equity impact is still in its infancy because few health systems have just begun to perform equity-informative economic evaluations.

    MeSH terms: Health Equity*; Asia; Decision Making; Delivery of Health Care; Humans; Technology Assessment, Biomedical*
  7. Yuen JJX, Saw ZK, Chua HS, Beh YH
    J Prosthet Dent, 2025 Feb 07.
    PMID: 39922746 DOI: 10.1016/j.prosdent.2025.01.019
    STATEMENT OF PROBLEM: Attempting to combine the mechanical and optical properties of ceramics and composite resins to mimic natural teeth has led to the emergence of resin nanoceramics and polymer interpenetrating ceramic network materials. Systematic reviews on the survival of these materials in endodontically treated teeth are lacking.

    PURPOSE: This systematic review and meta-analysis assesses the survival of computer-aided design and computer-aided manufacturing (CAD-CAM) resin nanoceramics and polymer interpenetrating ceramic network material restorations on endodontically treated teeth and to describe the incidence of complications.

    MATERIAL AND METHODS: The study was registered in the international prospective register of systematic reviews (PROSPERO) database and adhered to the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines. A comprehensive search across 6 online databases was performed. Clinical studies which involved CAD-CAM manufactured resin nanoceramics and polymer interpenetrating ceramic network material restorations on endodontically treated teeth were included. Several investigators independently conducted the study selection, data extraction, and quality assessment processes. Risk of bias was assessed by using the Cochrane Risk of Bias 2 tool and Newcastle-Ottawa Scale. Failure rates were analyzed using Poisson regression models to obtain summary estimates of 3- and 5-year survival proportions, which were pooled using a random-effects model. Subgroup analysis was performed for material type and restoration design (α=.05).

    RESULTS: The search resulted in 250 studies after duplicate removal, and 11 articles were included in the final analysis. The meta-analysis of 289 restorations revealed an overall estimated failure rate of 3.44 (95% confidence interval [95% CI]: 2.67-4.21) per 100 restoration years, equivalent to a survival rate of 90.2% (95% CI: 88.1-92.3%) after 3 years and 84.2% (95% CI: 81.0-87.5%) after 5 years. A significantly lower (P

  8. Baker TR, Adu-Bredu S, Affum-Baffoe K, Aiba SI, Akite P, Alexiades M, et al.
    Sci Rep, 2025 Feb 08;15(1):4695.
    PMID: 39922807 DOI: 10.1038/s41598-024-84367-3
    Understanding how the traits of lineages are related to diversification is key for elucidating the origin of variation in species richness. Here, we test whether traits are related to species richness among lineages of trees from all major biogeographical settings of the lowland wet tropics. We explore whether variation in mortality rate, breeding system and maximum diameter are related to species richness, either directly or via associations with range size, among 463 genera that contain wet tropical forest trees. For Amazonian genera, we also explore whether traits are related to species richness via variation among genera in mean species-level range size. Lineages with higher mortality rates-faster life-history strategies-have larger ranges in all biogeographic settings and have higher mean species-level range sizes in Amazonia. These lineages also have smaller maximum diameters and, in the Americas, contain dioecious species. In turn, lineages with greater overall range size have higher species richness. Our results show that fast life-history strategies influence species richness in all biogeographic settings because lineages with these ecological strategies have greater range sizes. These links suggest that dispersal has been a key process in the evolution of the tropical forest flora.
    MeSH terms: Trees*; Tropical Climate*; Biodiversity*; Forests
  9. Wong C, Ng JY, Sio YY, Chew FT
    J Physiol Anthropol, 2025 Feb 08;44(1):4.
    PMID: 39923055 DOI: 10.1186/s40101-025-00384-9
    BACKGROUND: Skin ageing is influenced by complex genetic factors. Various phenotypes such as wrinkling, pigmentation changes, and skin cancers have been linked to specific genetic loci. However, the underlying genetic mechanisms and pathways remain poorly understood. This systematic review and meta-analysis aims to summarise the genetic loci found to be associated with skin ageing phenotypes by published genome-wide association studies (GWAS) and candidate gene studies. We also evaluated the overall association of loci via meta-analysis and identified the association patterns to explore potential biological pathways contributing to skin ageing. The Web of Science, Embase, and PubMed databases were searched on January 2024 using specific exclusion criteria (e.g., study of non-human subjects, focus on skin diseases, or treatments) to identify relevant articles. There did not appear to be any significant publication bias observed across the all phenotypes.

    MAIN BODY: A total of 48 studies were included, revealing 30 loci that were confirmed to be associated with skin ageing by multiple studies (e.g., AFG3L1P: odds ratio 1.133 95% confidence interval [1.044, 1.222]; BPIFA3: 1.859 [1.567, 2.151]; CLPTML1: 1.164 [1.0.99, 1.229]; CPNE7: 0.905 [0.852-0.958]; DEF8: 1.186 [1.042, 1.331]; IRF4: 1.260 [1.025, 1.495]; MYO16: 2.303 [1.697, 2.908]; PRDM16: 1.105 [1.084, 1.127]; RORA: 1.391 [1.206, 1.577]; SPG7: 0.922 [0.897, 0.947]; SPON1: 2.214 [1.204, 3.225]; SPTLC1: 1.464 [1.432, 1.495]; TYR: 1.175 [1.007, 1.343]). The lack of significance for many loci may be due to studies analysing different SNPs within the same locus, weakening the overall associations. Several loci were associated with specific phenotypic categories (e.g., skin colour related, skin cancer related, wrinkling and sagging related), suggesting shared biological pathways are involved in the pathogenesis of different skin ageing phenotypes. This pattern was also observed in several of the loci that do not have a significant overall association with skin ageing.

    CONCLUSION: Despite significant heterogeneity among the included studies and the use of subjective visual methods for phenotype assessment, our review highlights the critical role of fundamental biological processes, such as development and cellular organisation, in skin ageing. Future research that targets the same SNP across multiple populations could strengthen the association of additional loci with skin ageing. Further investigation into these underlying biological processes would significantly advance our understanding of the pathogenesis of skin ageing phenotypes.

    MeSH terms: Humans; Genome-Wide Association Study*
  10. Ng JY, Wong QYA, Lim JJ, Cen D, Wong JYK, Lim YYE, et al.
    J Physiol Anthropol, 2025 Feb 08;44(1):3.
    PMID: 39923103 DOI: 10.1186/s40101-024-00383-2
    BACKGROUND: Skin ageing takes on many different forms. Despite this diversity in skin ageing phenotypes, literature published to date is limited in scope, as many research studies either focus on one single phenotype or just a few specific phenotypes. Presently, phenotypes such as wrinkles, pigment spots, and photo-ageing are receiving most of the research attention. We therefore wonder whether the current discourse on skin ageing places a disproportionate amount of focus on a few selected phenotypes, leaving other skin ageing phenotypes underexplored.

    METHODS: In this cross-sectional study, we performed a broad assessment of forty-one signs of skin ageing and characterised the phenotypes that constituted key components of skin ageing. We also explored the interrelationship among forty-one skin ageing phenotypes using Spearman's Correlation and Principal Component Analysis.

    RESULTS: We analysed our study population, which is composed of 3281 ethnic Chinese participants from the Singapore/Malaysia Cross-sectional Genetics Epidemiology Study (SMCGES). The first ten principal components cumulatively explain 46.88% of the variance of skin ageing phenotypes in our study population. We discovered that the commonly discussed forms of skin ageing (i.e., wrinkles, pigmentation, and photo-ageing) only accounted for a small portion (24.39%) of the variance of all skin ageing phenotypes in our study population. Telangiectasia, a poor lip fullness, a lighter skin colour, xerosis, ephelides (freckles), ptosis of eyelids (droopy eyelids), eyebags, and a low eyebrow positioning were other key components of skin ageing, accounting for a further 22.49% of the variance of skin ageing phenotypes in our study population. We found that each of these ten skin ageing phenotypes characterises a key and important aspect of skin ageing. In this broad assessment of skin ageing, we first described the prevalence of forty-one signs of skin ageing and then characterised in detail both the prevalence and severity distribution of ten key skin ageing phenotypes.

    CONCLUSIONS: We presented clear evidence that skin ageing is much more than just wrinkles, pigmentation and photo-ageing. The addition of telangiectasia, poor lip fullness, a lighter skin colour, xerosis, ephelides, ptosis of eyelids, eyebags, and a low eyebrow positioning added more dimensions to skin ageing phenotype presentations.

    MeSH terms: Adult; Aged; Cross-Sectional Studies; Female; Humans; Malaysia/epidemiology; Male; Middle Aged; Phenotype*; Skin/anatomy & histology; Skin Pigmentation/physiology; Principal Component Analysis; Young Adult
  11. Mohd Azam NNSFN, Othman S, Choo YM
    Curr Med Chem, 2025;32(1):87-110.
    PMID: 38818916 DOI: 10.2174/0109298673312727240527064833
    Malaria remains a significant global health threat despite extensive efforts aimed at its eradication. Numerous challenges persist in eliminating the disease, chief among them being the parasite's ability to mutate, resulting in drug resistance. The discovery of antimalarial drugs has relied on both phenotypic and target-based approaches. While phenotypic screening has identified promising candidates, target-based methods offer a more precise approach by leveraging chemically validated targets and computational tools. Analysis of Plasmodium spp . protein structures reveal druggable targets, offering opportunities for in silico screening. Combining compounds from natural and synthetic sources in a target-based approach accelerates the discovery of new antimalarial agents. This review explores previous breakthroughs in antimalarial drug discovery from natural products and synthetic origins, emphasizing their specific target proteins within Plasmodium species.
    MeSH terms: Animals; Humans; Malaria/drug therapy; Drug Discovery*
  12. Akyüz F, An YK, Begun J, Aniwan S, Bui HH, Chan W, et al.
    Intest Res, 2025 Jan;23(1):37-55.
    PMID: 39492666 DOI: 10.5217/ir.2024.00089
    The lack of clear definition and classification for "moderate ulcerative colitis (UC)" creates ambiguity regarding the suitability of step-up versus top-down treatment approaches. In this paper, experts address crucial gaps in assessing and managing moderate UC. The Asia-Pacific, Middle East, and Africa Inflammatory Bowel Disease Coalition comprised 24 experts who convened to share, discuss and vote electronically on management recommendations for moderate UC. Experts emphasized that the goal of treating UC is to attain clinical, biomarker, and endoscopic remission using cost-effective strategies such as 5-aminosalicylates (5-ASAs), well-tolerated therapy that can be optimized to improve outcomes. Experts agreed that 5-ASA therapy could be optimized by maximizing dosage (4 g/day for induction of remission), combining oral and topical administration, extending treatment duration beyond 8 weeks, and enhancing patient adherence through personalized counselling and reduced pill burden. Treatment escalation should ideally be reserved for patients with predictors of aggressive disease or those who do not respond to 5-ASA optimization. Premature treatment escalation to advanced therapies (including biologics and oral small molecules) may have long-term health and financial consequences. This paper provides consensus-based expert recommendations and a treatment algorithm, based on current evidence and practices, to assist decision-making in real-world settings.
  13. Kwan MK, Lee SY, Fam SK, Tan YWE, Ngan CH, Chandirasegaran S, et al.
    Eur Spine J, 2025 Feb;34(2):610-624.
    PMID: 39738872 DOI: 10.1007/s00586-024-08602-1
    PURPOSE: To devise a mathematical model for estimating the intraoperative lowest instrumented vertebra (LIV) tilt angle using preoperative supine left side-bending (LSB) radiographs in adolescent idiopathic scoliosis (AIS) patients with Lenke type 1 and 2 (non-AR curves), and to review its clinical and radiological outcomes.

    METHODS: The mathematical model for the adjusted LSB LIV tilt angle (α) measured preoperatively, was expressed as the sum of preoperative LSB LIV tilt angle (x) and LIV displacement angle (y) (α = x + y). This model was validated through inter-rater and intra-rater analysis in Part I of the study. The α angle derived was applied to estimate the intraoperative LIV tilt angle. In part II of the study, clinical and radiological outcomes of 50 Lenke type 1 and 2 (non-AR curves) AIS patients operated using the α angle were reviewed. The difference between the intraoperative LIV tilt angle achieved (β) and the preoperative α angle was determined (∆LIV tilt angle = β-α).

    RESULTS: The α angle had excellent inter-rater and intra-rater intraclass correlation coefficients (0.982; 0.907). 42 patients had positive ∆LIV tilt angles whereas 8 patients had negative ∆LIV tilt angles. The overall incidence of distal adding-on (AO) was 10.0% (n = 5/50). Patients with negative ∆LIV tilt angles had a higher incidence of distal AO (n = 4/8, 50.0%) than patients with positive ∆LIV tilt angles (n = 1/42, 2.4%) (p = 0.001).

    CONCLUSION: Achieving an intraoperative LIV tilt angle (β) greater than or equal to the preoperative α angle derived (β ≥ α) may help avoid the distal AO phenomenon.

    MeSH terms: Adolescent; Child; Female; Humans; Lumbar Vertebrae/surgery; Male; Models, Theoretical; Treatment Outcome
  14. Jamal FN, Dzulkarnain AAA, Basri NA, Rahmat S, Shahrudin FA, Azemin MZC, et al.
    J Audiol Otol, 2025 Jan;29(1):49-56.
    PMID: 39916400 DOI: 10.7874/jao.2024.00353
    BACKGROUND AND OBJECTIVES: Auditory sensory gating deficits are abnormalities in patients with autism spectrum disorder (ASD) that may lead to sensory processing difficulties. It is particularly difficult for children with ASD to distinguish multiple auditory stimuli, which hinders them from focusing on a single auditory stimulus and separating unnecessary sounds. Suppression of otoacoustic emission (OAE) is an approach used to identify sensory gating deficits in the general population, specifically for children with ASD. This study aimed to investigate the suppression effect of various types of sound suppressors to measure their sensory gating capacity in children with ASD. Subjects and.

    METHODS: Twenty children including 10 with ASD and 10 normally developing children aged 6-12 years were recruited for this study. One accessible ear was exposed to transient-evoked OAE, whereas the other was exposed to suppressor tones. Contralateral suppressors included white noise, Quranic recitations, environmental noise, and natural sound. The magnitude of OAE suppression was determined from the difference between the OAE amplitude with and without the masker (in dB sound pressure levels) for all sound types. The sound with the highest suppression effect was determined using effect size calculation and repeated-measures analysis of variance at a 95% confidence level. A high suppression effect may suggest a high sensory gating performance, whereas low suppression may indicate low sensory gating performance.

    RESULTS: Based on the analysis, the sound with the highest suppression effect was that of the waterfall. The suppression results were supported by descriptive analysis findings and effect-size calculations.

    CONCLUSIONS: This study provides a better understanding of the alternative sound stimuli, besides the standard white noise tone, for the assessment of sensory gating deficits among children with ASD. Sounds with a high suppression effect have the potential to be used as sound therapy interventions for children with ASD as part of rehabilitation and therapy.

  15. Kulkarni D, Lee B, Ismail NF, Rahman AE, Spinardi J, Kyaw MH, et al.
    J Glob Health, 2025 Feb 07;15:04032.
    PMID: 39916552 DOI: 10.7189/jogh.15.04032
    BACKGROUND: Our previous systematic review estimated the cumulative incidence of SARS-CoV-2 reinfections as 1.16% (95% CI = 1.01-1.33%) during the pre-Omicron period. The Omicron variant that emerged in November 2021 was significantly genetically distinct from the previous SARS-CoV-2 variants and thus, more transmissible and posed an increased risk of SARS-CoV-2 reinfections in the population. We, therefore, conducted a fresh systematic review and meta-analysis to estimate the SARS-CoV-2 reinfection burden during the Omicron period.

    METHODS: We searched CINAHL, Medline, Global Health, Embase, and WHO COVID-19 in October 2023 for studies reporting the SARS-CoV-2 reinfection incidence during the Omicron period. The quality of the included studies was assessed using the Joanna Briggs Institute checklists. Random effects meta-analyses were conducted to estimate the incidence, and requirement of hospitalisation of SARS-CoV-2 reinfections. Symptomatic severity of reinfections and case fatality rates were analysed narratively.

    RESULTS: Thirty-six studies were included. The reinfection cumulative incidence during the Omicron period was 3.35% (95% CI = 1.95-5.72%) based on data from 28 studies. The cumulative incidence was higher in 18-59-year-old adults (6.62% (95% CI = 3.22-13.12%)) compared to other age groups and in health care workers (9.88% (95% CI = 5.18-18.03%)) compared to the general population (2.48% (95% CI = 1.34-4.54%)). We estimated about 1.81% (95% CI = 0.18-15.87%) of the reinfected cases required hospitalisation based on limited and highly variable data.

    CONCLUSIONS: There was an increased risk of reinfections during the Omicron period compared to the pre-Omicron period. The incidence was higher in 18-59-year-old adults and health care workers and generally less severe during the Omicron period. However, data were limited on disease severity and long-term outcomes.

    REGISTRATION: PROSPERO: CRD42023482598.

    MeSH terms: Hospitalization/statistics & numerical data; Humans; Risk Factors; Severity of Illness Index*; Incidence
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