Displaying publications 1 - 20 of 52 in total

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  1. Zainah SH, Ong LC, Sofiah A, Poh BK, Hussain IH
    J Paediatr Child Health, 2001 Aug;37(4):376-81.
    PMID: 11532058
    OBJECTIVE: To compare the linear growth and nutritional parameters of a group of Malaysian children with cerebral palsy (CP) against a group of controls, and to determine the nutritional, medical and sociodemographic factors associated with poor growth in children with CP.

    METHODOLOGY: The linear growth of 101 children with CP and of their healthy controls matched for age, sex and ethnicity was measured using upper-arm length (UAL). Nutritional parameters of weight, triceps skin-fold thickness and mid-arm circumference were also measured. Total caloric intake was assessed using a 24-h recall of a 3-day food intake and calculated as a percentage of the Recommended Daily Allowance. Multiple regression analysis was used to determine nutritional, medical and sociodemographic factors associated with poor growth (using z-scores of UAL) in children with CP.

    RESULTS: Compared with the controls, children with CP had significantly lower mean UAL measurements (difference between means -1.1, 95% confidence interval -1.65 to - 0.59), weight (difference between means -6.0, 95% CI -7.66 to -4.34), mid-arm circumference (difference between means -1.3, 95% CI -2.06 to -0.56) and triceps skin-fold thickness (difference between means -2.5, 95% CI -3.5 to -1.43). Factors associated with low z-scores of UAL were a lower percentage of median weight (P < 0.001), tube feeding (P < 0.001) and increasing age (P < 0.001).

    CONCLUSION: A large proportion of Malaysian children with CP have poor nutritional status and linear growth. Nutritional assessment and management at an early age might help this group of children achieve adequate growth.

  2. Wo SW, Ong LC, Low WY, Lai PSM
    Epilepsy Res, 2017 10;136:35-45.
    PMID: 28753498 DOI: 10.1016/j.eplepsyres.2017.07.009
    PURPOSE: To systematically examine published literature which assessed the prevalence of academic difficulties in children with epilepsy (CWE) of normal intelligence, and its associating factors.

    METHODS: A search was conducted on five databases for articles published in English from 1980 till March 2015. Included were studies who recruited children (aged 5-18 years), with a diagnosis or newly/recurrent epilepsy, an intelligent quotient (IQ) of ≥70 or attending regular school, with or without a control group, which measured academic achievement using a standardised objective measure, and published in English. Excluded were children with learning difficulties, intellectual disabilities (IQ<70) and other comorbidities such as attention deficits hyperactive disorder or autism. Two pairs of reviewers extracted the data, and met to resolve any differences from the data extraction process.

    RESULTS: Twenty studies were included. The majority of the studies assessed "low achievement" whist only two studies used the IQ-achievement discrepancy definition of "underachievement". Fourteen studies (70%) reported that CWE had significantly lower academic achievement scores compared to healthy controls, children with asthma or reported norms. The remaining six studies (30%) did not report any differences. CWE had stable academic achievement scores over time (2-4 years), even among those whose seizure frequency improved. Higher parental education and children with higher IQ, and had better attention or had a positive attitude towards epilepsy, were associated with higher academic achievement score. Older children were found to have lower academic achievement score.

    CONCLUSIONS: In CWE of normal intelligence, the majority of published literature found that academic achievement was lower than controls or reported norms. The high percentages of low achievement in CWE, especially in the older age group, and the stability of scores even as seizure frequency improved, highlights the need for early screening of learning problems, and continued surveillance.

  3. Teoh SL, Boo NY, Ong LC, Nyein MK, Lye MS, Au MK
    Eye (Lond), 1995;9 ( Pt 6):733-7.
    PMID: 8849541
    One hundred and thirteen consecutive infants with a very low birthweight of less than 1500 g were followed prospectively for 6 months to determine the incidence of retinopathy of prematurity (ROP) and associated risk factors. Of this group, 36 (31.9%) infants developed ROP (13 infants had stage 1 ROP, nine had stage 2, six had stage 3, six had stage 4, and two had cicatricial stage ROP). Stepwise logistic regression analysis of various potential risk factors (birthweight, gestation, duration of oxygen therapy, duration of ventilation, highest documented PaO2 and exchange transfusion) showed that only two risk factors were significantly associated with the development of ROP. These risk factors were: the duration of oxygen therapy (p = 0.0005) and exchange transfusion during the neonatal period (odds ratio 5.754, 95% confidence interval 1.002 to 32.997, p = 0.049). The equation of the regression model is: log (odds of developing ROP) = -0.8395 + 0.1447 (OXY)- 0.8750 (ET), where OXY is the duration of oxygen therapy in days, ET = -1 when there was a history of exchange transfusion, and ET = 1 when there was no history of exchange transfusion.
  4. Tan WH, Ong L, Strijk JS
    PhytoKeys, 2023;219:1-10.
    PMID: 37252448 DOI: 10.3897/phytokeys.219.95991
    A new species from the Fagaceae family, Castanopsiscorallocarpus Tan & Strijk, is described from Royal Belum State Park in Peninsular Malaysia. Here, we provide technical illustrations, colour images and a description of its conservation status and the collecting locality, in addition to a comparative analysis with other species in the region. The solitary nut of C.corallocarpus has a morphologically unique cupule, lined with rows of thick coral-like spines not seen in other Castanopsis species.
  5. Tan SY, Leong WH, Ong LH, Mohd-Amin MZ
    Malays Orthop J, 2020 Jul;14(2):138-140.
    PMID: 32983390 DOI: 10.5704/MOJ.2007.023
    Lateral femoral wall perforation is a rare intra-operative complication in anterior cruciate ligament (ACL) reconstruction surgery. However, it can be challenging to manage if it occurs. We share our experience on lateral femoral wall perforation managed by a large fragment washer. A 25-year-old man with right ACL injury presented with knee instability despite physiotherapy. Anterior drawer test (ADT) and Lachman test were grade 3, glide on pivot shift was positive. During ACL reconstruction, the lateral femoral wall was perforated. Due to unavailability of the rescue endobutton and budget constraint, we passed the endobutton through a washer and allowed it to sit on the washer over the lateral femoral wall. ADT and Lachman test on post-operative 6, 12 and 24 weeks were grade 1, with a negative pivot shift test. Lysholm knee score improved from 69 pre-operatively to 98 post-operatively. Conventionally, lateral femoral wall perforation can be managed by rescue endobutton, or screw and washer post technique. As this complication is rare, the rescue endobutton may not be available at all times, and the cost of the implant is also another important factor to consider. A washer can be used as an alternative technique to manage lateral femoral wall perforation in ACL reconstruction as it is not only cost-effective but also provides stable fixation with good functional outcome.
  6. Sharanjeet-Kaur, Norlaila MD, Chung KM, Azrin EA, Boo NY, Ong LC
    Clin Ter, 2011;162(6):517-9.
    PMID: 22262320
    A cross-sectional study was undertaken to determine and compare the refractive status of premature children without retinopathy of prematurity (ROP) and full term children below the age of three years.
  7. Ruzanna ZZ, Ong LY, Cheah YC, Fairuz A, Midin M
    Med J Malaysia, 2012 Feb;67(1):39-44.
    PMID: 22582547 MyJurnal
    This cross sectional study aimed to explore the association between dyslipidaemia and types of antipsychotics in 100 patients with chronic schizophrenia. Lipid profile, weight, height and waist circumference together with other relevant factors were measured. We found there was a high rate of dyslipidaemia among patients with chronic schizophrenia treated with antipsychotics (66%), however there was no significant difference found between typical or atypical antipsychotics (OR=1). All sociodemographic and clinical factors were not significantly associated with dyslipidaemia. Only non-Malays were found to have significant dyslipidaemia (p<0.1). Effective management is needed to deal with the dyslipidaemia in this group.
  8. Rohana J, Boo NY, Yong SC, Ong LC
    Med J Malaysia, 2005 Aug;60(3):338-44.
    PMID: 16379189 MyJurnal
    A quality assurance study was carried out prospectively in two phases at the Neonatal Intensive Care Unit (NICU) of Hospital Universiti Kebangsaan Malaysia. The objectives of the study were to determine the turn-around-time (TAT) of radiographs requested for infants undergoing intensive care treatment in the NICU and the effects of a standard operating procedure introduced based on initial findings of first phase of the study on subsequent TAT. The TAT was defined as the time taken for the radiograph to be ready for viewing after the attending doctor had requested for it to be done on an infant. During phase one of the study, none of the requested radiographs was ready to be viewed by the doctors within the standard TAT of 45 minutes. The problems identified were ward staffs delay in sending request forms to the radiology department, radiographers' delay in shooting and processing the films, and delay by NICU porter in collecting the processed films. Based on these findings, a standard operating procedure (SOP) was drawn up jointly by the staff of NICU and Department of Radiology. During phase two of the study conducted at one month after implementation of the SOP, there was a reduction of TAT by 50%. However, only 3 (4.3%) of the radiographs achieved the standard TAT. The main problems identified during phase two were delay in sending request forms and in collecting processed radiographs by the porter system. The dismal TAT of radiographs in NICU was related primarily to human behaviour. Besides continuous staff education, replacement of the porter system with electronic system may improve the TAT.
    Keywords: Turn-around time, radiographs, neonatal intensive care unit, standard operating procedure, Kuala Lumpur
  9. Rohana J, Ong LC, Abu Hassan AA
    Med J Malaysia, 1998 Sep;53(3):217-22.
    PMID: 10968156
    A prospective observational study was carried out at the Emergency Department, Hospital Kuala Lumpur to determine the proportion of accidental head injury among children and the circumstances of injury. The study was carried out from November 1993 to January 1994 on all children below 14 years who presented to the Emergency Department with accidental head injury. Accidental head injury made up (4.75%) of all cases seen at the Casualty Department. The ratio of boys to girls was 2:1. The mean age of head injured children was 5.2 (S.D. 3.63) years. The leading cause of head injury was fall (63%) followed by road traffic accidents (RTA) in (30.7%) while the rest were due to 'impact' (injury caused by flying object or missiles) injuries. More than half (54.4%) of those injured in RTA were pedestrians. Pedestrian injury was particularly important in the 5-< 14 years age group, where adult supervision was lacking in two thirds of the children. None of the patients who were involved in vehicle-related injuries had used a suitable protective or restraining device. All three patients who died were from this group. This study emphasises the need for stricter enforcement of laws related to the use of protective devices and measures to decrease child pedestrian injury. The issues of lack of adult supervision, both in and outside the home need to be addressed.
  10. Ramli N, Yap A, Muridan R, Seow P, Rahmat K, Fong CY, et al.
    Clin Radiol, 2020 01;75(1):77.e15-77.e22.
    PMID: 31668796 DOI: 10.1016/j.crad.2019.09.134
    AIM: To evaluate the microstructural abnormalities of the white matter tracts (WMT) using diffusion tensor imaging (DTI) in children with global developmental delay (GDD).

    MATERIALS AND METHODS: Sixteen children with GDD underwent magnetic resonance imaging (MRI) and cross-sectional DTI. Formal developmental assessment of all GDD patients was performed using the Mullen Scales of Early Learning. An automated processing pipeline for the WMT assessment was implemented. The DTI-derived metrics of the children with GDD were compared to healthy children with normal development (ND).

    RESULTS: Only two out of the 17 WMT demonstrated significant differences (p<0.05) in DTI parameters between the GDD and ND group. In the uncinate fasciculus (UF), the GDD group had lower mean values for fractional anisotropy (FA; 0.40 versus 0.44), higher values for mean diffusivity (0.96 versus 0.91×10-3 mm2/s) and radial diffusivity (0.75 versus 0.68×10-3 mm2/s) compared to the ND group. In the superior cerebellar peduncle (SCP), mean FA values were lower for the GDD group (0.38 versus 0.40). Normal myelination pattern of DTI parameters was deviated against age for GDD group for UF and SCP.

    CONCLUSION: The UF and SCP WMT showed microstructural changes suggestive of compromised white matter maturation in children with GDD. The DTI metrics have potential as imaging markers for inadequate white matter maturation in GDD children.

  11. Punithavathi N, Ong LM, Irfhan Ali HA, Mohd Izmi IA, Dharminy T, Ang AH, et al.
    Med J Malaysia, 2014 Feb;69(1):16-20.
    PMID: 24814623 MyJurnal
    INTRODUCTION: Conventional Chest Physiotherapy (CCPT) remains the mainstay of treatment for sputum mobilization in patients with productive cough such as bronchiectasis and "Chronic Obstructive Airway Disease" (COPD). However CCPT is time consuming requires the assistance of a physiotherapist and limits the independence of the patient. Mechanical percussors which are electrical devices used to provide percussion to the external chest wall might provide autonomy and greater compliance. We compared safety and efficacy of a mechanical chest percusser devised by Formedic Technology with conventional chest percussion.
    METHODS: Twenty patients (mean age 64years) were randomly assigned to receive either CCPT or mechanical percussor on the first day and crossed over by "Latin square randomisation" to alternative treatment for 6 consecutive days and the amount of sputum expectorated was compared by dry and wet weight. Adverse events and willingness to use was assessed by a home diary and a questionnaire.
    RESULTS: There were 13 males and 7 females, eight diagnosed as bronchiectasis and 12 COPD. The mean dry weight of sputum induced by CCPT (0.54g ± 0.32) was significantly more compared with MP (0.40g + 0.11); p-value = 0.002. The mean wet weight of sputum with CCPT (10.71g ± 8.70) was also significantly more compared with MP (5.99g ± 4.5); p-value < 0.001. There were no significant difference in adverse events and majority of patients were willing to use the device by themselves.
    CONCLUSION: The mechanical percussor although produces less sputum is well tolerated and can be a useful adjunct to CCPT.
  12. Punithavathi N, Ong LM, Lena YL, Leekha S, Storvas Clinical Trial Study Group
    Med J Malaysia, 2009 Jun;64(2):150-4.
    PMID: 20058576 MyJurnal
    A multicenter study was conducted to assess the efficacy of a generic form of Atorvastatin (Ranbaxy's Storvas) in the treatment of Primary Hypercholesterolemia. One hundred and nineteen patients were given 10 mg of Storvas for four weeks and increased to 20 mg if target LDL-Cholesterol was not achieved. LDL-Cholesterol was reduced by 36.6% at four weeks and 37.5% at eight weeks from baseline. Total cholesterol and triglycerides were significantly reduced. There were no drug-related serious adverse events. We conclude that the generic atorvastatin is safe and effective in the treatment of primary hypercholesterolaemia and the results are comparable to published data on innovator atorvastatin.
  13. Ong LY, Pang T, Lim SH, Tan EL, Puthucheary SD
    J Med Microbiol, 1989 Jul;29(3):195-8.
    PMID: 2473209
    A simple adherence test to detect IgM antibodies in patients with typhoid is described. The test utilises the IgM-"capture" approach, in which the test serum is applied to microtitration plate wells previously coated with anti-human IgM, followed by application of a stained Salmonella typhi antigen suspension which shows adherence in positive cases. By this test, 58 (95%) of 61 sera from confirmed cases of typhoid possessed IgM antibodies to the H or O or both antigens of S. typhi. In patients for whom a diagnosis of typhoid was based only on a significant Widal-test titre, 31 (41%) of 76 sera had IgM antibodies to the H or O or both antigens of S. typhi. Some cross-reactivity of the IgM antibodies was detected, especially with the O antigens of S. paratyphi A and B. A total of 82 sera from non-typhoidal fevers (leptospirosis, typhus, dengue fever) showed no reactivity in this test. In normal sera there was no detectable IgM to the O antigen of S. typhi and only a small number (3.9%) had low levels of IgM to the H antigen. The significance and potential importance of this simple, sensitive, specific and economical test is discussed.
  14. Ong LS, Hamiadji T, Chong KL
    Med J Malaysia, 1980 Sep;35(1):53-7.
    PMID: 7253999
    This study is based on measuring the d.c. (direct current) skin conductance of the acupuncture points representing the heart on the external ear. The subjects were 30 healthy volunteers and 20 cardiac patients. The results obtained showed that the skin resistance of the heart acupuncture loci on the auricle of the cardiac patients were markedly reduced when compared with that of the healthy controls. The value of this method of auricular electroacupuncture diagnosis is discussed.
  15. Ong LK, Sivaneswaran L, Mohd Najib A, Devindran M, Say BL, Rohan MJ
    Med J Malaysia, 2020 07;75(4):400-402.
    PMID: 32724002
    In Malaysia, COVID-19 pandemic recorded considerable number of cases. Many hospitals have been converted into COVID-19 centres to manage these cases. The Penang General Hospital was designated as a hybrid hospital to manage both COVID-19 and non-COVID-19 cases. Consequently, services across specialties, including urology have been affected. Triage of referrals was necessary to ensure optimum patient care, thus we designed a triage system to address this situation. A record screening system of patients was also implemented to limit outpatient appointments. We share this early experience in managing urology patients during this pandemic.
  16. Ong LG, Abd-Aziz S, Noraini S, Karim MI, Hassan MA
    Appl Biochem Biotechnol, 2004 8 12;118(1-3):73-9.
    PMID: 15304740
    The oil palm sector is one of the major plantation industries in Malaysia. Palm kernel cake is a byproduct of extracted palm kernel oil. Mostly palm kernel cake is wasted or is mixed with other nutrients and used as animal feed, especially for ruminant animals. Recently, palm kernel cake has been identified as an important ingredient for the formulation of animal feed, and it is also exported especially to Europe, South Korea, and Japan. It can barely be consumed by nonruminant (monogastric) animals owing to the high percentages of hemicellulose and cellulose contents. Palm kernel cake must undergo suitable pretreatment in order to decrease the percentage of hemicellulose and cellulose. One of the methods employed in this study is fermentation with microorganisms, particularly fungi, to partially degrade the hemicellulose and cellulose content. This work focused on the production of enzymes by Aspergillus niger and profiling using palm kernel cake as carbon source.
  17. Ong LC, Chandran V, Boo NY
    Acta Paediatr, 2001 Dec;90(12):1464-9.
    PMID: 11853347 DOI: 10.1080/08035250152708905
    A study was carried out to compare parenting stress between 116 mothers of very low birthweight (VLBW) children and 96 mothers of normal birthweight (NBW) children at 4 y of age, using the Parenting Stress Index (PSI). Multiple regression analysis was used to determine factors associated with child-domain stress (CDS) and parent-domain stress (PDS). There was a significantly higher proportion (39.7%) of mothers of VLBW children with high CDS scores >90th percentile than mothers of NBW children (20.8%). No significant differences were observed for PDS scores. Lower intelligence quotient (IQ) scores and adverse child behaviour, as evidenced by higher Child Behavior Checklist (CBCL) scores, were significantly associated with higher CDS scores (p < 0.001). Factors associated with higher PDS scores were higher CBCL scores (p < 0.001), mothers who were the primary caregivers (p < 0.001), male sex (p = 0.018) and lower level of maternal education (p = 0.048). These factors remained statistically significant even when physically and cognitively impaired children were excluded from the analysis.

    CONCLUSION: Specific child characteristics and the social environment appear to have a greater impact on parenting stress than the biological risk of VLBW birth per se.
  18. Ong LC, Boo NY, Chandran V
    J Paediatr Child Health, 2001 Aug;37(4):363-8.
    PMID: 11532056 DOI: 10.1046/j.1440-1754.2001.00694.x
    OBJECTIVE: To determine neonatal, early developmental and social risk factors that predict the neurocognitive and behavioural outcome of very low birthweight (VLBW) preschool children at four years of age.

    METHODOLOGY: From a cohort of 151 eligible VLBW survivors born in Kuala Lumpur Maternity Hospital, 116 (76.8%) were prospectively followed up from birth till four years. A standardised neurological examination was performed at one and four years to determine the presence of impairment and cerebral palsy, respectively. Cognitive development was assessed using the Mental Scale of the Bayley Scales of Infant Development (MDI) at one year and the Weschler Preschool and Primary Scale of Intelligence-Revised (WIPPSI-R) at four years. Motor coordination was assessed using the Movement Assessment Battery for Children (Movement-ABC). Mothers completed the Child Behaviour Checklist (CBCL) and Parenting Stress Index (PSI) questionnaires. Logistic and multiple regression analyses were used to determine factors associated with cerebral palsy, IQ scores, Movement-ABC and CBCL scores.

    RESULTS: Factors associated with cerebral palsy were lower MDI scores at one year (P = 0.001) and late neonatal cranial ultrasound abnormalities (P = 0.036). Minor (P = 0.016) or major impairment (P = 0.003) at one year of age and a low level of paternal education (P = 0.01) were associated with poor motor function on the Movement-ABC scale. Lower levels of maternal education (P < 0.001), impairment at one year (P = 0.002) and late neonatal cranial ultrasound abnormalities (P = 0.039) predicted Full Scale IQ scores. Higher PSI scores (P = 0.001), younger mothers (P = 0.003) and late neonatal cranial ultrasound abnormalities (P = 0.009) were associated with worsened child behaviour scores on the CBCL scale.

    CONCLUSION: Social factors and the caregiving environment were important determinants of cognitive and behavioural outcome. Cranial ultrasound abnormalities in the late neonatal period and the developmental status at one year might be useful in identifying high risk infants in need of long-term surveillance.
  19. Ong LC, Chandran V, Peng R
    J Paediatr Child Health, 1999 Aug;35(4):358-362.
    PMID: 28871653 DOI: 10.1046/j.1440-1754.1999.00383.x
    OBJECTIVE: To compare parenting stress among Malaysian mothers of children with mental retardation and a control group, and to determine factors associated with stress.
    METHODOLOGY: Seventy-five mothers of children with mental retardation aged 4-12 years and 75 controls (those without disabilities who attended the walk-in paediatric clinic) participated in the Parenting Stress Index (PSI). Intelligence quotient (IQ) and Child Behaviour Checklist (CBCL) scores, together with sociodemographic data, were entered into a multiple stepwise regression analysis, using the PSI as the criterion.
    RESULTS: Mothers of children with mental retardation scored significantly higher than control subjects in both the child-related domain (difference between means 26.1, 95% confidence interval 19.6-32.5) and parent-related domain (difference between means 15.0, 95% confidence interval 7.9-22.1) of the PSI. The total child behaviour scores from the CBCL (P < 0.01), IQ scores (P < 0.01) and sibship size (P < 0.01) were associated with child-related domain scores. For the parent-related domain, CBCL (P < 0.01) and IQ scores (P = 0.01) remained important factors but Chinese ethnicity (P < 0.01) and maternal unemployment (P < 0.01) were also significant predictors of stress.
    CONCLUSION: A large proportion of mothers of children with mental retardation experienced substantial parenting stress, especially Chinese and unemployed mothers, and this warrants appropriate intervention.
    Study site: Outpatient clinic, Paediatric Institute, Hospital Kuala Lumpur, Malaysia
  20. Ong LC, Dhillon MK, Selladurai BM, Maimunah A, Lye MS
    J Paediatr Child Health, 1996 Apr;32(2):173-6.
    PMID: 9156530
    OBJECTIVE: To determine the type and outcome of early post-traumatic seizures in children and the factors associated with it.

    METHODOLOGY: A prospective observational study on all consecutive children with head injuries at the General Hospital Kuala Lumpur between November 1993 and December 1994. The onset, type and frequency of seizures occurring within the first week of injury were documented. Using inpatients as a cohort, logistic regression analysis was used to determine clinical and radiological variables significantly associated with seizures. The outcome 6 months post-injury was assessed using the Glasgow Outcome Scale.

    RESULTS: Fifty-three of 966 children (5.5%) developed seizures within the first week of trauma. Seven (13.2%) occurred within 1 h of injury, 30 (56.6%) between 1 and 24 h and 16 (30.2%) after 24 h. Factors significantly associated with early post-traumatic seizures were female sex, age less than 2 years, loss of consciousness for more than 24h and acute subdural haematoma (P<0.01). Children with seizures had a poorer outcome (death or severe disability) than inpatients without seizures (21/53 vs 19/182, P<0.001). The outcome was worst in children with recurrent partial seizures, who had a longer injury-seizure interval and were more likely to have focal neurologic deficits compared to those with sporadic or generalized seizures.

    CONCLUSIONS: Anticonvulsant prophylaxis to minimize the adverse effects of early seizures in head injury should be considered for young children (less than 2 years old) with subdural haematoma and a prolonged duration of coma. Prompt and effective control of recurrent seizures is recommended.

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