Displaying publications 1 - 20 of 65 in total

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  1. Hussin, A.S., Mokhtar, N., Naing, L., Taylor, J.A., Mahmood, Z.
    MyJurnal
    The purpose of this study was to determine the timing and sequence of emergence of the first 28 permanent teeth in a cross-section of Malay children in the district of Kota Bharu, in northeastern Peninsula Malaysia. The sample consists of 478 boys and 908 girls of Malay descent aged between 5-19 years. The criterion for tooth emergence was the appearance of the tooth through the gingivae. Descriptive statistics were calculated and probit regression analysis performed to determine the mean age of emergence of the permanent dentition. The mean age at emergence was found to conform to general trends, with emergence seen earlier in girls than in boys. Comparisons were made with the Chinese (Hong Kong) and the Punjabi (Chandigarh) profiles, which showed earlier emergence timings in those ethnic groups. The emergence timing in Malays, however, was earlier than in Thais (Central Thailand). The sequence of emergence was determined by referring to the mean age of tooth emergence of individual teeth and conforms to the general trend seen in other studies.
  2. Mokhtar N, Chan SC
    Med J Malaysia, 2006 Mar;61(1):125-7.
    PMID: 16708752 MyJurnal
    Complementary Medicine (CM) usage amongst asthmatic patients was studied. Eighty-eight patients, selected by systematic random sampling in two public polyclinics in April/May 2004, were interviewed. They completed a structured pre-tested questionnaire. Forty-one percent were using CM, majority (64%) together with conventional therapy. Eighty-one percent did not inform their physicians of their CM usage. More Malays were using CM which included nutritional supplements, herbs, yoga, homoeopathy, reflexology and massage.
  3. Mokhtar N, Singh R, Ghazali W
    Med J Malaysia, 1993 Dec;48(4):403-6.
    PMID: 8183163
    We report a retrospective review of 12 medical students with a peculiar erythemato-vesicular dermatitis entomologically caused by an endemic beetle Paederus fuscipes. The clinical features, outcome in these cases and treatment are discussed. The students were residents of hostels in the USM campus in Kubang Kerian, Kelantan. The causative agent in all these cases were found to be Paederus fuscipes (rove beetle). The most common site of involvement in all these cases was the face, followed by the neck. The average duration of symptoms was two days and pruritus was a common symptom. About 83% of the patients made a complete recovery. However two patients (16%) had residual pigmentation.
  4. Nizam A, Naing L, Mokhtar N
    Clin Oral Investig, 2003 Dec;7(4):222-5.
    PMID: 14648258
    The aim of this study was to determine the age and sequence of eruption of permanent teeth, as well as gender differences, in children and adolescents in Kelantan, Malaysia. Cross-sectional data on permanent teeth eruption were collected by examining pre-school, primary and secondary school children of 5-17 years of age. The subjects were drawn by multistage random sampling from the school registers. There were 2,382 subjects in the sample, 1,062 boys and 1,320 girls. The data were subjected to probit regression analysis. The mean age of eruption of lower first molar was 6.0 (95%CI: 5.8, 6.2) years. The median age of eruption of each tooth was earlier in girls than in boys. Although the range of years during which the permanent teeth erupted was similar in both sexes, i.e. 6-12 years, the sequence of the tooth eruption differed. All mandibular teeth, with the exception of first and second premolars in both males and females, tended to erupt earlier than their maxillary counterparts. The findings seem to correspond to earlier studies done in the other parts of the world.
  5. Romli R, Shahabudin S, Saddki N, Mokhtar N
    Med J Malaysia, 2019 02;74(1):8-14.
    PMID: 30846655
    INTRODUCTION: Cervical cancer is among the most common cancers in women worldwide. The Pap smear test is the primary screening procedure used to detect abnormal cells that may develop into cancer.

    OBJECTIVES: This study analysed the knowledge, attitudes and practices of working women in Kedah state, Malaysia, about cervical cancer and Pap smear tests and the associations of knowledge, attitudes and practices with socio-demographic factors.

    METHODS: This cross-sectional questionnaire study analysed knowledge, attitudes and practices among 210 female entrepreneurs who received funding from Amanah Ikhtiar Malaysia (AIM) in Kedah state. Women were included if they were married or previously married, aged 20-65 years and had not been diagnosed with cervical cancer.

    RESULTS: Most subjects could not recall common symptoms of cervical cancer, such as bleeding between periods, and did not know or were unsure of the suitable age for Pap smear tests and the interval between tests. Although most subjects agreed that Pap smear tests were necessary, some gave priority to other issues. About half (55.2%) had undergone Pap smear tests, but only 38.6% had been tested within the previous five years. Use of hormonal contraceptives, higher knowledge score, and higher attitude score were associated with Pap smear testing within the previous 5 years.

    CONCLUSIONS: Knowledge regarding cervical cancer and Pap smear testing and attitudes toward testing were poor among most participants. These factors were significantly associated with lack of actual testing.

  6. Mafauzy M, Mokhtar N, Mohamad WB, Musalmah M
    Asia Pac J Public Health, 1999;11(1):16-9.
    PMID: 10829822 DOI: 10.1177/101053959901100104
    Two thousand five hundred and eight subjects from the state of Kelantan in North-East Peninsular Malaysia were included in this study to determine the prevalence of diabetes mellitus and impaired glucose tolerance and their association with cardiovascular risk factors. The overall prevalence of diabetes mellitus was 10.5% and impaired glucose tolerance was 16.5%. There was no difference in the prevalence of diabetes mellitus between males and females but the prevalence of impaired glucose tolerance was higher in females (19.0%) than in males (11.5%). Subjects with diabetes mellitus were more obese (38.4%) than normal subjects (24.1%). They also had a higher prevalence of hypertension (12.9%) and hypercholesterolaemia (71.9%) than normal subjects. Subjects with impaired glucose tolerance also had a higher prevalence of obesity (35.5%), hypertension (9.0%) and hypercholesterolaemia (63.0%) than normal subjects. In conclusion, the prevalence of diabetes mellitus and impaired glucose tolerance was high and they were associated with a high prevalence of obesity, hypertension and hypercholesterolaemia.
  7. Kamaliah MD, Zainal D, Mokhtar N, Nazmi N
    Int J Dermatol, 1998 Jul;37(7):520-3.
    PMID: 9679693
    BACKGROUND: Previous studies have reported that drugs and infections are common causes of erythema multiforme (EM) and Stevens-Johnson syndrome (SJS). Toxic epidermal necrolysis (TEN) is mainly related to drugs. No study has been conducted in Kelantan, the northeastern state of Malaysia, to assess these cutaneous reactions.

    METHODS: A retrospective study of all hospitalized cases of EM, SJS, and TEN was conducted covering an 8-year period from 1987 to 1994.

    RESULTS: There were four cases (13.8%) of EM, 22 cases (75.9%) of SJS, and three cases (10.3%) of TEN. Drugs as a definitive cause was observed in one case (25%) of EM, 12 cases (54.5%) of SJS, and two cases (66.7%) of TEN. Drugs as a probable cause was observed in seven cases (31.8%) of SJS and one case (33.3%) of TEN. The male to female ratio was equal in EM and SJS. Antiepileptics were the commonest culprits, followed by antibiotics. One patient died of SJS and one patient died of TEN, giving mortality rates of 4.5% and 33.5% respectively. Fever was noted in 18 patients (62.1%). Leukocytosis was noted in 10 patients (34.5%), and nine patients (31.0%) had elevated liver transaminase enzymes. No significant correlation was noted between these biochemical changes and cutaneous eruption. Secondary infections were observed in 11 patients (37.9%): Staphylococcus aureus was the commonest isolated organism.

    CONCLUSIONS: This study shows that drugs remain the commonest culprit in SJS and TEN. Despite adequate treatment, the mortality rate remains high, especially in TEN. These findings are similar to those of other reported studies.

  8. Mafauzy M, Mokhtar N, Wan Mohamad WB
    Med J Malaysia, 2003 Oct;58(4):556-64.
    PMID: 15190632
    Two thousand five hundred and eight subjects from the state of Kelantan in North-East Peninsular Malaysia were included in this study to determine the prevalence of hypertension and their association with cardiovascular risk factors. The overall prevalence of hypertension was 13.9%. There was no difference in the prevalence of hypertension between the males and females. The prevalence increased with age--the highest being in those above 70-years old. Subjects with hypertension also had a higher prevalence of diabetes mellitus (19.0%), obesity (39.4%) and hypercholesterolaemia (70.7%) than non-hypertensive subjects. Of the hypertensive subjects, 83.3% had 1 other risk factor for cardiovascular disease, 66.7% had 2 other risk factors and 16.7% had more than 2 risk factors. Other than age, body mass index, plasma glucose, total cholesterol and LDL-cholesterol, hypertensive subjects also had a higher mean serum urea, creatinine, uric acid and triglyceride than non-hypertensive subjects. In conclusion, hypertension is a common disease in this area and is associated with multiple risk factors for cardiovascular disease. The prevalence is likely to increase in the near future with increasing affluence and becoming a major health problem.
  9. Aziz F, Arof H, Mokhtar N, Mubin M
    J Neural Eng, 2014 Oct;11(5):056018.
    PMID: 25188730 DOI: 10.1088/1741-2560/11/5/056018
    This paper presents a wheelchair navigation system based on a hidden Markov model (HMM), which we developed to assist those with restricted mobility. The semi-autonomous system is equipped with obstacle/collision avoidance sensors and it takes the electrooculography (EOG) signal traces from the user as commands to maneuver the wheelchair. The EOG traces originate from eyeball and eyelid movements and they are embedded in EEG signals collected from the scalp of the user at three different locations. Features extracted from the EOG traces are used to determine whether the eyes are open or closed, and whether the eyes are gazing to the right, center, or left. These features are utilized as inputs to a few support vector machine (SVM) classifiers, whose outputs are regarded as observations to an HMM. The HMM determines the state of the system and generates commands for navigating the wheelchair accordingly. The use of simple features and the implementation of a sliding window that captures important signatures in the EOG traces result in a fast execution time and high classification rates. The wheelchair is equipped with a proximity sensor and it can move forward and backward in three directions. The asynchronous system achieved an average classification rate of 98% when tested with online data while its average execution time was less than 1 s. It was also tested in a navigation experiment where all of the participants managed to complete the tasks successfully without collisions.
  10. Samsudin S, Adwan S, Arof H, Mokhtar N, Ibrahim F
    J Digit Imaging, 2013 Apr;26(2):361-70.
    PMID: 22610151 DOI: 10.1007/s10278-012-9483-5
    Standard X-ray images using conventional screen-film technique have a limited field of view that is insufficient to show the full bone structure of large hands on a single frame. To produce images containing the whole hand structure, digitized images from the X-ray films can be assembled using image stitching. This paper presents a new medical image stitching method that utilizes minimum average correlation energy filters to identify and merge pairs of hand X-ray medical images. The effectiveness of the proposed method is demonstrated in the experiments involving two databases which contain a total of 40 pairs of overlapping and non-overlapping hand images. The experimental results are compared with that of the normalized cross-correlation (NCC) method. It is found that the proposed method outperforms the NCC method in classifying and merging the overlapping and non-overlapping medical images. The efficacy of the proposed method is further indicated by its average execution time, which is about five times shorter than that of the other method.
  11. Mokhtar N, Thevarajah M, Ma N, M I
    Asian Pac J Cancer Prev, 2012;13(12):6391-5.
    PMID: 23464464
    BACKGROUND: Ovarian cancer is ranked as the fifth most common cause of cancer death in women. In Malaysia, it is the fourth most common cancer in females. CA125 has been the tumor marker of choice in ovarian cancer but its diagnostic specificity in early stages is only 50%. Hence, there is a critical need to identify an alternative tumor marker that is capable of detecting detect ovarian cancer at an early stage. HE4 is a new tumor marker proposed for the early diagnosis of ovarian cancer and disease recurrence. Currently, none of the normal ranges of HE4 quoted in the literature are based on data for a multiethnic Asian population. Therefore, the aim of this study was to determine reference intervals for HE4 in an Asian population presenting in University Malaya Medical Centre, a tertiary reference hospital.

    MATERIALS AND METHODS: 300 healthy women were recruited comprising 150 premenopausal and 150 postmenopausal women, aged from 20-76 years. All women were subjected to a pelvic ultrasonograph and were confirmed to be free from ovarian pathology on recruitment. Serum HE4 levels were determined by chemiluminescent microparticle immunoassay (CMIA, Abbott Architect). The reference intervals were determined following CLSI guidelines (C28-A2) using a non-parametric method.

    RESULTS: The upper limits of the 95th percentile reference interval (90%CI) for all the women collectively were 64.6 pmol/L, and 58.4 pmol/L for premenopausal) and 69.0 pmol/L for postmenopausal. The concentration of HE4 was noted to increase with age especially in women who were more than 50 years old. We also noted that our proposed reference limit was lower compared to the level given by manufacturer Abbott Architect HE4 kit insert (58.4 vs 70 pmol/L for premenopausal group and 69.0 vs 140 pmol/L in the postmenopausal group). The study also showed a significant difference in HE4 concentrations between ethnic groups (Malays and Indians). The levels of HE4 in Indians appeared higher than in Malays (p<0.05), while no significant differences were noted between the Malays and Chinese ethnic groups.

    CONCLUSIONS: More data are needed to establish a reference interval that will better represent the multiethnic Malaysian population. Probably a larger sampling size of equal representation of the Malay, Chinese, Indians as well as the other native ethnic communities will give us a greater confidence on whether genetics plays a role in reference interval determination.

  12. Jamal F, Yasin MS, Abdullah R, Mokhtar N
    J Diarrhoeal Dis Res, 1986 Jun;4(2):74-6.
    PMID: 3571875
  13. Elyaskhil M, Shafai NAA, Mokhtar N
    Health Qual Life Outcomes, 2021 Mar 03;19(1):71.
    PMID: 33658030 DOI: 10.1186/s12955-021-01710-2
    BACKGROUND: The present study aims to determine the impact of malocclusion on oral health related quality of life (OHRQoL) among 13-16 years old Malay school children.

    METHODS: School children aged between 13 and 16 years old were randomly selected from a secondary school in Penang. Malay version of Oral Health Impact Profile-14 (OHIP-14) questionnaires were given to the subjects. This questionnaire has 14 questions with seven domains which are functional limitation, psychological discomfort, physical pain, physical disability, psychological and social disability, and handicap. Index of orthodontic treatment need dental health component was used to assess the orthodontic treatment need. Overjet (reversed overjet), open bite, overbite, cross bite, impeded eruption, crowding, defects of cleft lip and palate, Class II and Class III buccal occlusion, present of supernumerary and hypodontia were assessed.

    RESULTS: 255 students participated in this study. Mean score and standard deviation for OHIP-14 were 8.64 (± 7.32) for males and 11.05 (± 9.41) for females respectively. There was statistically significant difference in mean score of OHIP-14 between male and female (p = 0.023). A weak positive correlation was found between malocclusion severity and OHRQoL (r = 0.186; p 

  14. Fareen N, Alam MK, Khamis MF, Mokhtar N
    Orthod Craniofac Res, 2017 Aug;20(3):134-139.
    PMID: 28440029 DOI: 10.1111/ocr.12179
    OBJECTIVE: Reverse Twin-Block (RTB) and Reverse Pull Face Mask (RPFM) appliances are used to correct Class III malocclusion in growing patients. Aim of this retrospective study was to compare and analyse craniofacial changes produced by RTB and RPFM in the early and late mixed dentition in Malay children with Class III malocclusion.

    METHODS: Data consisted of pre- and post-treatment lateral cephalograms of 95 children, 49 patients with RTB and 46 patients with RPFM, divided into an early (8-9 year) and late (10-11 year) group. Treatment changes were assessed by the Ricketts analysis using CASSOS software, where 71 anatomic landmarks were identified in each cephalogram. Paired and independent t tests were performed for statistical comparison.

    RESULTS: Paired t test revealed significant changes in facial axis, facial angle, MD plane to FH, lower facial height, mandibular arc, maxillary convexity, U1 to APog, L1 to APog, L1 to APog angle and upper lip to E-plane measurements in RPFM, whereas significant changes were found in facial taper, U1 to APog and lower lip to E-plane values with RTB in the early treatment group. Independent t test revealed significant changes in U1 to APog, L1 to APog and U6 to PtV values in the RTB group. Post-treatment comparison of RTB and RPFM showed significant differences in L1 to APog and L1 to APog angle values.

    CONCLUSIONS: RPFM revealed more favourable craniofacial changes than RTB, particularly in the late mixed dentition stage.

  15. Romli R, Shahabudin S, Saddki N, Mokhtar N
    Asian Pac J Cancer Prev, 2020 Mar 01;21(3):853-859.
    PMID: 32212817 DOI: 10.31557/APJCP.2020.21.3.853
    OBJECTIVE: We examined the effectiveness of a health education program to improve; knowledge and attitude towards cervical cancer and Pap smear, and uptake of Pap smear test among female entrepreneurs in Kedah, a northern state of Malaysia.

    METHODS: This controlled community trial involved 210 women from the districts of Alor Setar and Sungai Petani. Simple random sampling was applied to select 105 women from each district. Self-administered questionnaires were used to obtain information about the variables of interest. Health education intervention program included educational talk, demo video, experience sharing, pamphlet distribution, and text message reminders. Evaluation of outcomes was performed twice. The text message reminders acted as the cues to action that were sent between the two evaluation times at one-month interval. Women in the control group received educational talk alone. In the control group, evaluation of outcomes was done only once, which was one month after the educational talk.

    RESULTS: Knowledge on cervical cancer and Pap smear, and attitude towards Pap smear among women in both intervention and control group improved significantly at Evaluation stage 1. However, no further improvements were observed in the intervention group at Evaluation stage 2. The uptake of Pap smear in the intervention group increased significantly from 48.0% at Baseline to 68.0% at Evaluation stage 1 (P<0.001), and from 68.0% to 79.0% at Evaluation stage 2 (P<0.001). A significant increase in Pap smear uptake was also seen in the control group from 63.0% at Baseline to 76.0% at Evaluation stage 1 (P=0.003).

    CONCLUSIONS: Educational talk alone was effective in improving knowledge on cervical cancer and Pap smear, attitude towards the test, and the actual uptake of the test. However, text reminders were more effective than having an educational talk alone in increasing uptake of Pap smear test among participants.
    .

  16. Tasrip, N.A., Khairil Mokhtar, N. F., Hanapi, U.K., Abdul Manaf, Y. N., Ali, M.E., Cheah, Y.K., et al.
    MyJurnal
    Isothermal amplification is a technique that can amplify target DNA sequences at a single incubation temperature. Loop-mediated isothermal amplification (LAMP) is an extension of the isothermal DNA amplification technique that combines rapidity, simplicity, high specificity and sensitivity. Due to its overwhelming characteristics, LAMP has been explored for its feasibility in detecting various subjects, and recently in meat-based food products for DNA-based meat species authentication. It has been developed to target various meat species such as porcine, chicken, horse, and ostrich with sensitivity as low as 0.1 pg/μL. Further improvement with the use of magnetic beads, electrochemiluminescence and special dye such as calcein and crystal violet had increased the sensitivity of the LAMP assay. Other important characteristics were specific target gene primers as well as a shorter incubation time, warranting a good prospect for rapid testing authentication.
  17. Razali MF, Mahmud AS, Mokhtar N
    J Mech Behav Biomed Mater, 2018 Jan;77:234-241.
    PMID: 28954242 DOI: 10.1016/j.jmbbm.2017.09.021
    NiTi arch wires are used widely in orthodontic treatment due to its superelastic and biocompatibility properties. In brackets configuration, the force released from the arch wire is influenced by the sliding resistances developed on the arch wire-bracket contact. This study investigated the evolution of the forces released by a rectangular NiTi arch wire towards possible intraoral temperature and deflection changes. A three dimensional finite element model was developed to measure the force-deflection behavior of superelastic arch wire. Finite element analysis was used to distinguish the martensite fraction and phase state of arch wire microstructure in relation to the magnitude of wire deflection. The predicted tensile and bending results from the numerical model showed a good agreement with the experimental results. As contact developed between the wire and bracket, binding influenced the force-deflection curve by changing the martensitic transformation plateau into a slope. The arch wire recovered from greater magnitude of deflection released lower force than one recovered from smaller deflection. In contrast, it was observed that the plateau slope increased from 0.66N/mm to 1.1N/mm when the temperature was increased from 26°C to 46°C.
  18. Mohamad WB, Mokhtar N, Mafauzy M, Mustaffa BE, Musalmah M
    PMID: 9279999
    Height and body weight were measured in 2,284 subjects over 20 years old. The subjects were chosen by cluster sampling in 9 districts of Kelantan. Blood was drawn after an overnight fast for measurement of cholesterol (chol), triglyceride (TG), VLDL and HDL-Chol. Oral glucose tolerance test was performed with 75 g glucose. The overall prevalence of overweight [BMI (kg/m2) > or = 25-< or = 30] and obesity (BMI > 30) was 21.3% and 4.5% respectively. The overweight and obese were significantly younger than the lean subjects. The prevalence of hypercholesterolemia (chol > 5.2 mmol/l) in lean, overweight and obese subjects was 65.3%, 70.2% and 74.7%, respectively. Impaired glucose tolerance was found in 16.6% of the lean, 21.6% of the overweight and 32.0% of the obese subjects. Diabetes mellitus was found in 7.9% of the lean, 10.5% of the overweight and 6.7 of the obese subjects. 10.1% of lean, 13.2% of overweight and 23.3% of obese individuals were hypertensive. In conclusion, the high prevalence of overweight and obesity in Malaysia was associated with adverse lipid and glucose metabolism as well as poor blood pressure control.
  19. Fareen N, Alam MK, Khamis MF, Mokhtar N
    Int J Pediatr Otorhinolaryngol, 2019 Oct;125:159-163.
    PMID: 31323354 DOI: 10.1016/j.ijporl.2019.07.008
    BACKGROUND: Treatment of Class III malocclusion is related to redirecting the growth of mandible, which may have an impact on the pharyngeal airway.

    OBJECTIVE: To evaluate and compare the treatment effect of Reverse Twin-Block (RTB) and Reverse Pull Face Mask (RPFM) on Pharyngeal Airway Space (PAS) in early and late mixed dentition Class III samples.

    METHODS: Ninety-five mixed dentition Malay children with Class III malocclusion were included in this study. Data consists of 190 pre- and post-treatment lateral cephalograms of early (8-9 years) and late (10-11 years) mixed dentition Class III samples. forty-nine samples were under RTB and forty-six samples were under RPFM. Treatment changes were evaluated by McNamara airway analysis and changes in tongue and hyoid bone position.

    RESULTS: Both upper and lower pharyngeal airway width were increased after treatment with RTB and RPFM ruling out the chance of airway constriction. There was also posterior positioning of the tongue and hyoid bone indicating mandibular retrusion. No significant treatment changes were found on the Pharyngeal Airway Space by the factor age, gender or type of appliance.

    CONCLUSIONS: Both RTB and RPFM increased the Pharyngeal Airway Space and produced similar treatment effect. As age does not affect the treatment outcome significantly, treatment can be delayed until late mixed dentition stage.

  20. Fareen N, Alam MK, Khamis MF, Mokhtar N
    Biomed Res Int, 2021;2021:6612598.
    PMID: 33834067 DOI: 10.1155/2021/6612598
    Objective: This study was focused on comparing and analyzing the soft tissue changes induced by Reverse Twin-Block (RTB) and Reverse Pull Face Mask (RPFM) in early and late mixed dentition Malay children having Class III malocclusion.

    Methods: This cross-sectional study includes a total sample of 95 Malay children of both early (8-9 years) and late (10-11 years) mixed dentition stages. The comparison was between 49 samples treated by RTB and 46 samples treated by RPFM. Both pre- and posttreatment changes were assessed with Holdaway's analysis using the CASSOS software. In each cephalogram, 71 anatomic landmarks were traced. Descriptive and multiple regression analyses were performed for statistical evaluation.

    Results: Statistically significant changes were noticed in soft tissue facial angle, subnasale to H-line, skeletal profile convexity, upper lip strain, H-line angle, lower lip to H-line, and inferior sulcus to H-line measurements. Gender disparity was noticed in upper lip strain. Other significant changes were influenced by the type of appliance. However, the mean differences were minute to notice clinically. Age difference did not have any effect on the treatment changes.

    Conclusions: RPFM revealed treatment outcome with more protruded upper lip than RTB.

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