Displaying publications 1 - 20 of 264 in total

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  1. Akta? S
    Sains Malaysiana, 2016;45:1565-1572.
    In incomplete contingency tables, some cells may contain structural zeros. The quasi-independence model, which is a generalization of the independence model, is most commonly model used to analyze incomplete contingency tables. Goodness of fit tests of the quasi-independence model are usually based on Pearson chi square test statistic and likelihood ratio test statistic. In power divergence statistics family, the selection of power divergence parameter is of interest in multivariate discrete data. In this study, a simulation study is conducted to evaluate the performance of the power divergence statistics under quasi independence model for particular power divergence parameters in terms of power values.
    Matched MeSH terms: Chi-Square Distribution
  2. Abdul Rais, A.R., Wan Abdul Manan, W.M, Shariza, A.R., Wan Nadiah, W.A.
    MyJurnal
    ‘Nasi kandar’ is defined as boiled white rice placed inside a wooden basket and carried on the shoulder using a pole. The rice is served with a variety of pairing dishes that are usually fried, curried or boiled. The tradition of carrying rice and pairing dishes on the shoulder began to die out in the 20th century as seller resorted to a more conventional way of selling ‘nasi kandar’. The ‘nasi kandar’ business in Malaysia has evolved from being sold as a street food into a multi-million dollar franchise business rivalling the fast food business. It is available 24 hours and enjoyed by Malaysians from all walks of life. This study aims to compare ‘nasi kandar’ eating pattern among patrons in the Klang Valley and Penang. Three hundred sets of questionnaires were answered and collected. Data from the questionnaires were analyzed in PASW 18.0 using descriptive statistics and chi-square test for association. Klang Valley patrons (72%) would consume ‘nasi kandar’ once a week. More than half (53.3%) of the patrons from Penang consumed ‘nasi kandar’ more than twice a week. A significant relationship exists between patron’s region and frequency of ‘nasi kandar’ consumption where p = <0.0001 and r = 0.277. A significant but moderate relationship between patron’s region and consumption of ‘nasi kandar’ during breakfast (p = <0.001, r = 0.250), lunch (p = <0.0001, r = 264) and dinner (p = <0.0001, r = 0.336). Patrons in Penang consumed ‘nasi kandar’ more often than their Klang Valley counterparts. Klang Valley patrons were more particular than Penang patrons when it comes to cleanliness, menu pricing, friendly service, air-condition and separate smoking area. Klang Valley patrons tend to consume more chicken based dishes while Penang patrons tend to consume more meat, fish, and squid based dishes.
    Matched MeSH terms: Chi-Square Distribution
  3. Hanifah AL, Ismail SH, Ho TM
    PMID: 21073028
    Four commercial repellents were evaluated in the laboratory against Leptotrombidium deliense chiggers. Both in vitro and in vivo methods were used to determine repellency of the compounds. The repellents were Kellis (containing citronella oil, jojoba oil and tea tree oil), Kaps (containing citronella oil), BioZ (containing citronella oil, geranium oil and lemon grass oil) and Off (containing DEET). The combination of three active ingredients: citronella oil, geranium oil, lemon grass oil gave the highest repellency (87%) followed by DEET (84%). In vitro repellencies ranged from 73% to 87%. There was no significant difference between the four products. All the repellents had 100% in vivo repellency compared to 41-57% for the controls.
    Matched MeSH terms: Chi-Square Distribution
  4. Esa R, Razak IA, Jallaudin RL, Jaafar N
    Clin Prev Dent, 1992 Jan-Feb;14(1):23-7.
    PMID: 1499238
    A survey on oral hygiene practices was conducted on 537 dentate adult patients aged 15 years and over. The aim of this study was to investigate the variation in dental behavior with regards to socio-demographic factors, namely age, sex, ethnicity, income, education and occupational status. Patients attending nine randomly selected government dental clinics were interviewed on their daily oral hygiene practices. The majority (89.7%) of the subjects reported that they brushed their teeth, 68% used toothpaste containing fluoride, but only 8.4% flossed their teeth. Generally the younger group had better oral hygiene habits. The higher the socioeconomic status of the adults, the better their toothcleaning practices. Awareness concerning dental floss was low regardless of all the socio-demographic variables. It was concluded that there is a need to improve the dental health practices of adults in Malaysia.
    Matched MeSH terms: Chi-Square Distribution
  5. Noor Hazfalinda Hamzah, Amalina Farhatul Farida Mohamad Seliman, Khairul Osman, Gabriel, Gina Francesca
    MyJurnal
    Cheiloscopy is recognized as a tool for personal identification due to its strength in criminalistics. In this study, the lip print of Malaysian Chinese population in Klang Valley was used for gender determination using lipstick-cellophane technique. 412 subjects (203 males and 209 females) were selected conveniently. Lipstick was first applied on the lips and the lip print was lifted using cellophane tape prior to pasting them onto a plain A4 paper and analysis using magnifying glass. Six topography areas of lip prints were classified using Suzuki and Tsuchihashi’s classification, including upper left, upper middle, upper right, lower right, lower middle and lower left. Chi-square test showed that all lip sections were significantly different from each other (p < 0.05). Type II was the dominant pattern in four lip sections for both genders: upper left (male 81.3%, female 57.4%), upper right (male 71.9%, female 42.9%), lower left (male 98.0%, female 90.0%) and lower right (male 96.1%, female 86.1%). Type IV was the dominant pattern for both middle part of the lips; upper middle (male 56.2%, female 50.7%) and lower middle (male 62.6%, female 50.2%). The results showed that gender can be differentiated based on lip print patterns. This finding suggested that cheiloscopy could be used in aiding personal identification for forensic investigation.
    Matched MeSH terms: Chi-Square Distribution
  6. Nur Liyana I., Sharanjeet-Kaur, Saadah M.A., Mahadir A., Abdul Mutalib O.
    MyJurnal
    This study aimed to develop a questionnaire in Malay language for the identification of risk factors for myopia among primary school children aged 10 to 12 years old in Malaysia. Materials and Methods: The study commenced in October 2012 till Julai 2013 in two main phases. The first phase was a pilot study for the construction of questionnaire items by literature review and discussion with the experts. A total of 103 parents of primary school children were randomly selected to test the comprehensibility of the preliminary questionnaire. The second phase was the actual study which involved parents of 353 primary school children , 132 were parents whose children were myopes and 221 parents whose children were nonmyopes. Results: Discussions with experts in human vision science identified 5 main domains and 71 items for the preliminary questionnaire. A total of 55 items were retained for the actual study phase in view of statistically good correlation (r = 0.4 and above). Predictive validity by chi-square test allowed 28 items to be retained because of significant association with myopia (p
    Matched MeSH terms: Chi-Square Distribution
  7. Manaf H, Justine M, Hassan N
    Malays Orthop J, 2021 Mar;15(1):21-26.
    PMID: 33880144 DOI: 10.5704/MOJ.2103.004
    Introduction: Hockey is a team sport that involves running, sprinting, and making sudden changes in directions of movement to control a ball against the opposing team. Therefore, due to its nature of fast movement, hockey players may be at risk of various musculoskeletal injuries. This study aimed to identify the prevalence and pattern of musculoskeletal injuries sustained among Malaysian Hockey League players.

    Materials and Method: Data were collected from 84 field hockey players that participated in the Malaysian Hockey League competition from June 2016 until December 2016. All injuries were recorded by the participating medical team using a structured questionnaire. A descriptive statistical analysis and Chi-Square test were used to explore the prevalence of the injury.

    Result: More than half of the players were reported to have lower limb injuries (51.6%). Sprain and strain were the most prevalent injuries (63%) and mostly affected the ankle (29%). Male players sustained more injuries (50.8%) compared to female players (49.2%).

    Conclusion: This study suggests that a guideline is needed for injury prevention strategies that will benefit the hockey players in preventing injuries.

    Matched MeSH terms: Chi-Square Distribution
  8. Amin Faiz Nohan, Siti Nur ‘Asyura Adznam, Rosita Jamaluddin, Camilla Wahida Norazman
    MyJurnal
    Introduction: Diet quality is an essential factor in determining the adherence towards dietary guidelines. This study aims to assess the diet quality among community-dwelling older adults and identify the factors associated with the diet quality. Method: This is a cross-sectional study, conducted among 138 community-dwelling older adults living in PPR flats, Kuala Lumpur. Subjects were randomly recruited in this study. Diet Quality Index (DQI) was used to identify diet quality index of elderly. The Chi-square Test of Independence and Pearson’s correlation test were used to determine the association between tested covariates with DQI. Results: Majority of the respondents were report- ed with good diet quality (74.6%), whereas quarter of them (25.6%) had poor diet quality. Significant difference between the diet quality and the adherence on the food groups were observed for all food groups (p
    Matched MeSH terms: Chi-Square Distribution
  9. Nor Aishah Ahad, Suhaida Abdullah, Lai, Choo Heng, Nazihah Mohd. Ali
    MyJurnal
    The classical procedures of comparing two groups, such as t-test are, usually restricted with the assumptions of normality and equal variances. When these assumptions are violated, the rates of the Type I errors of the independent samples t-test are affected, particularly when the sample sizes are small. In this situation, the bootstrap procedure has an advantage over the parametric t-test. In this study, the performances of the bootstrap procedure and the independent sample t-test were investigated. The investigation focused on the power of both the test procedures to compare the two groups under different design specifications for normal and chi-square distributions. The results showed that the bootstrap procedure has a slight edge over the conventional t-test in term of the rate of achieving the benchmark level for both the distributions. In fact, the bootstrap procedure consistently outperformed the conventional t-test across all the combinations of the test conditions.
    Matched MeSH terms: Chi-Square Distribution
  10. Mohamed Azmi H., Zeehan S.I., Fahad S., Maryam F., Hisham A.
    MyJurnal
    The study aims to evaluate students’ perceptions towards e-Learning Management System (e-LMS) in pharmacy education. A cross-sectional survey was conducted among all undergraduates enrolled at School of Pharmaceutical Sciences, Universiti Sains Malaysia. A pre-validated questionnaire consisting of two domains (demographic characteristics and students’ perception regarding the use of e-LMS) was used for data collection. Descriptive statistics were used to describe the demographic characteristics of the study respondents. Chi Square test was used to measure association between the study variables. All analysis was performed by using Predictive Analytical Software (PASW) v. 18. A total of 315 students completed the survey questionnaire with a response rate of 57.6%. Majority of the students (61.0%) accessed e-LMS to acquire lecture notes for their studies, followed by 53.3% have used e-LMS for the preparation of the assignments. Seventy eight percent of the respondents agreed that e-LMS is very useful and felt that e-LMS is making their studies easier. However, 50% of students claimed that poor network connection at the campus is a major barrier in accessing e-LMS. Moreover, 48% of the respondents disagreed that e-LMS should be taken into account as an assessment criterion for students’ grading. Students are found to be frequently engaged in using e-LMS and believed that online based learning is
    enhancing their academic performances. Nevertheless, students still prefer hybrid teaching methodologies than choosing traditional system or e-learning as an alone entity.
    Matched MeSH terms: Chi-Square Distribution
  11. Rajeshwari K, Kohli S, Mathew XK
    J Clin Diagn Res, 2017 Apr;11(4):ZC61-ZC63.
    PMID: 28571264 DOI: 10.7860/JCDR/2017/23709.9683
    INTRODUCTION: Presence of abnormal resting tongue position can lead to poor denture retention and stability. The prevalence of retracted tongue position has been found to be higher in partially edentulous subjects compared to dentate subjects and is greatest in completely edentulous individuals.

    AIM: To evaluate resting tongue position in recently extracted and long term completely edentulous patients, and to evaluate the efficacy of achieving retracted tongue position by simple modification in complete denture along with certain tongue exercises.

    MATERIALS AND METHODS: A total of 62 study subjects were classified into two groups based on duration of edentulousness. Group A: Recently extracted completely edentulous subjects (<1 year), Group B: Long term completely edentulous subjects (>1-10 year). The patients with retracted tongue position were subjected to a simple modification in complete denture along with inclusion of certain tongue exercises. After eight months patients were recalled and evaluated. The data was analysed using SPSS statistical tests like mean, standard deviation, proportion, Chi square test and McNemar Test.

    RESULTS: Among the study subjects, 54.9% had retracted tongue position. Group B showed high proportion of retracted tongue position (68.8%) as compared to Group A. After the intervention, 42.8% study subjects gained normal resting tongue position.

    CONCLUSION: Long term completely edentulous subjects presented retracted tongue position in higher percentage when compared to the recently extracted group. The interventional method employed for the subjects with retracted tongue position, played a significant role to assume normal resting tongue position and showed improvement in denture stability and retention.

    Matched MeSH terms: Chi-Square Distribution
  12. Ramachandra SS, Gupta VV, Mehta DS, Gundavarapu KC, Luigi N
    Contemp Clin Dent, 2017 Oct-Dec;8(4):594-603.
    PMID: 29326511 DOI: 10.4103/ccd.ccd_623_17
    Background: Differentiating between chronic periodontitis (CP) and aggressive periodontitis (AgP) is challenging. The aim of this study was to assess the variations in diagnosis between CP versus AgP and the staging of AgP based on the disease-staging index for AgP among periodontists, specialists in oral medicine, and general dental practitioners (GDPs).

    Materials and Methods: Fifteen cases diagnosed as either CP or AgP were included in a "case document" and sent electronically to 75 respondents. Case document included a detailed history with periodontal charting, clinical features, images, and radiographs for all the cases. Diagnosis and staging for the case (if diagnosed as AgP) were requested. A reordered case document (cases in a different sequence) was again sent to respondents after a gap of 1 month.

    Statistical analysis: Descriptive statistics including frequency and percentage were calculated. Pearson's Chi-square test was used to analyze the data collected.

    Results: For the "case document," 10.17% of the responses were different from those of the authors for diagnosis, whereas 4.48% of the responses were different from those of the authors for the staging of AgP. The agreement in the overall responses was in the range of 0.69-0.84, which was considered good. Comparison of the responses for diagnosis showed statistically significant (P = 0.009) difference between specialists in oral medicine and GDPs.

    Conclusions: Variations exist among respondents regarding the diagnosis of CP versus AgP. Staging of AgP based on the listed criteria showed low variations.
    Matched MeSH terms: Chi-Square Distribution
  13. Sapulete EJJ, de Dwi Lingga Utama IMG, Sanjaya Putra IGN, Kanya Wati D, Arimbawa IM, Gustawan IW
    Malays J Med Sci, 2020 May;27(3):67-74.
    PMID: 32684807 DOI: 10.21315/mjms2020.27.3.7
    Background: Soil transmitted helminths (STH) are intestinal nematodes and constitute one of the most neglected tropical diseases to exist. Objective: This study determined the efficacy of albendazole-pyrantel pamoate compared to albendazole in 8-12 years old children with Trichuris trichiura infection.

    Methods: A randomised controlled trial was conducted between October 2017 and February 2018 on participants whose stool examinations confirmed the presence of Trichuris trichiura infection. The subjects were randomised into two groups. The statistical analysis used Chi-square test.

    Results: There were 392 of 600 children at five public elementary schools in Bangli and Bali and were infected with Trichuris trichiura. The cure rate of Trichuris trichiura infection seven days following treatment was lower with the combination of albendazole and pyrantel pamoate compared to that of albendazole. The egg reduction rate of Trichuris trichiura infection was lower with the combination of albendazole and pyrantel pamoate compared to albendazole.

    Conclusion: The study indicated that a combination of albendazole and pyrantel pamoate does not improve cure rate or egg reduction rate in 8-12 years old children with Trichuris trichiura infection.

    Matched MeSH terms: Chi-Square Distribution
  14. Ahmad A, Khan MU, Moorthy J, Jamshed SQ, Patel I
    Pharm Pract (Granada), 2015 03 15;13(1):523.
    PMID: 25883690
    BACKGROUND: There is limited research on pharmacy specialization based differences with regards to usage of antibiotics.

    OBJECTIVE: To compare the knowledge, attitude and practice of Bachelor of Pharmacy (BPharm) and Doctor of Pharmacy (PharmD) students about usage and resistance of antibiotics in Southern India.

    METHODS: This was a cross sectional study involving final year BPharm and PharmD students studying in two private institutions located in Andra Pradesh, India. The study was conducted for the period of 3 months. The questionnaire was divided into 5 components: demographics, knowledge about antibiotic use, attitude towards antibiotic use and resistance, self-antibiotic usage, and possible causes of antibiotic resistance. The study questionnaire was assessed for reliability. Data were analysed by employing Mann Whitney and chi square tests using SPSS version 19.

    RESULTS: The sample size comprised of 137 students. The response rate was 76.11% for the study. There was a significant difference in the knowledge of antibiotic use in BPharm and PharmD students (Mean score: 5.09 vs 6.18, p<0.001). The overall attitude of PharmD students about antibiotic use and resistance was positive compared to BPharm students (Mean score: 3.05 vs 2.23, p<0.05). The self-antibiotic practices was higher in BPharm students than PharmD students (36.4% vs 20%, p<0.05). A significantly high number of PharmD students believed that empirical antibiotic therapy led to antibiotic resistance (19.5% versus 48%, P<0.05).

    CONCLUSION: PharmD students were more knowledgeable about antibiotic usage and resistance compared to BPharm students who did not have accurate and the much needed information about the same. Future interventions should be targeted towards educating the BPharm students so that they can implement the acquired knowledge in their practice.

    Matched MeSH terms: Chi-Square Distribution
  15. Zulkifli SN, Low WY
    J Adolesc Health, 2000 Oct;27(4):276-80.
    PMID: 11008091
    This paper describes findings on selected determinants of sexual intercourse among 468 unmarried adolescents from a survey in Malaysia. Data on respondents' background, sexual experience, contraceptive use, and sexual attitudes are provided. Based on multiple logistic regressions, factors significantly predictive of sexual experience are gender, employment, and sexual attitudes.
    Matched MeSH terms: Chi-Square Distribution
  16. Tahir HM, Ismail NN, Gebbie DA
    Asia Oceania J Obstet Gynaecol, 1991 Jun;17(2):135-42.
    PMID: 1867582
    Low birth weight babies are defined as those weighing under 2,500 g. They make 13.5% of all births at the Maternity Hospital, Kuala Lumpur but contribute to 74.8% of all deaths. They are most likely to be Indian babies and least likely to be Chinese. Among all 3 communities, the primigravidae tend to produce smaller babies than multiparae but this is also true for the Indian of parity more than 3. The Malay teenager is more likely to produce small babies than their older counterparts but not so with the Indian and Chinese. There are definite clinical factors associated with or causing the births of small babies and the lighter the baby, the more influential are these factors. Maternal hypertension, antepartum haemorrhage, multiple pregnancy and unexplained intrauterine death are the 4 outstanding associations with both low birth weight and perinatal death. Although the spontaneous (often premature) onset of labour was the commonest preceding factor, it was much less important in the lowest birth weight groups of babies and was a less important contributor to perinatal death.
    Matched MeSH terms: Chi-Square Distribution
  17. Hasan I, Arshad A, Rahim NA, Soo PY
    Asian J Transfus Sci, 2020 07 24;14(1):28-32.
    PMID: 33162702 DOI: 10.4103/ajts.AJTS_111_17
    CONTEXT: Whole blood donation is generally considered a safe procedure; however, a small percentage of donors could develop vasovagal reactions (VVRs) during or after completion of blood donation.

    AIMS: This study was undertaken to establish the prevalence of VVR among whole blood donors in Hospital Pulau Pinang and to investigate factors that lead to its occurrence.

    SETTINGS AND DESIGN: A cross-sectional study was conducted involving 27,890 whole blood donations in 2016.

    SUBJECTS AND METHODS: For each donation, donor's demographic and blood donation-related information was extracted from the blood bank database.

    STATISTICAL ANALYSIS USED: Qualitative data including age group, sex, race, frequency, and location of donation were analyzed using Chi-square tests, while blood pressure was analyzed using t-test.

    RESULTS: Overall, 425 cases of VVRs were reported, resulting in a VVR rate of 1.5% (one event in every 65 donations). We found a statistically significant association (P < 0.05) between the occurrence of VVRs with the young age group, female gender, Indian race, first-time donor, lower predonation blood pressure, and donation performed in a mobile donation campaign. The most common vasovagal symptoms are lightheadedness (88%), followed by nausea (5.4%), muscle twitching (3.5%), vomiting (1.4%), loss of consciousness <30 s (1.4%), and paresthesia (0.2%).

    CONCLUSIONS: The prevalence of VVRs among whole blood donors in Hospital Pulau Pinang appeared to be low. Our study reaffirms that blood donation is a relatively safe process, and the incidence of VVR can be further reduced by ensuring strict screening procedure before blood donation.

    Matched MeSH terms: Chi-Square Distribution
  18. Kewalramani R, Murthy CS, Gupta R
    J Oral Biol Craniofac Res, 2019 08 31;9(4):347-351.
    PMID: 31528537 DOI: 10.1016/j.jobcr.2019.08.001
    Introduction: Elusive second mesiobuccal canal (MB2) in maxillary first molar are often missed during endodontic therapy and are a major cause of treatment failures. Its prevalence is known to vary among different populations and there is limited information on its prevalence in Indian population.

    Aim: This study investigated the prevalence and location of second mesiobuccal (MB2) canal in mesiobuccal root of maxillary first molar using cone beam computed tomography (CBCT) images in an Indian population.

    Materials and methods: CBCT images of 598 three rooted maxillary first molars were studied. In each CBCT image, the floor of pulp chamber was located and advanced by 2 mm to standardize the observation for MB2 canal. Its location was determined in relation to mesiobuccal (MB1) and palatal (P) canal.

    Statistical analysis: The data was analysed using descriptive statistics. The presence of MB2 canal was correlated with age, gender and tooth position using Chi square test.

    Results: The prevalence of MB2 canal in three rooted maxillary first molar was 61.9%. It was seen that the prevalence of MB2 was highest in 20-40years age group (67.4%) followed by > 40 years (57.5%) and lowest in <20 years (50.6%) and the difference was statistically significant (p = 0.005). It is located mesiopalatally; 2.5 mm ± 0.6 mm palatally and 1.0 ± 0.4mmmesially to the MB1 canal or present directly on the line joining the MB1 and palatal canal.

    Conclusion: There is a high probability of finding MB2 canal in Indian patients. The access cavity must be modified from a triangular shape to rhomboid shape. Troughingmesiopaltally (about 2.5 mm palatally and 1 mm mesially) from MB1 to a depth of about 2 mm from the floor of pulp chamber may be necessary for locating MB2 canal.

    Matched MeSH terms: Chi-Square Distribution
  19. Md Pauzi SH, Saari HN, Roslan MR, Syed Khair Azman Jamalulil SNS, Tauan IS, Mohd Rusli FA, et al.
    Malays J Pathol, 2019 Aug;41(2):133-138.
    PMID: 31427548
    INTRODUCTION: Evaluation of HER2 status in breast cancer using immunohistochemistry (IHC) and in-situ-hybridisation (ISH) study is important to establish prognosis and to select patient for targeted therapy.

    OBJECTIVE: The study aims to determine the concordance between HER2 protein IHC score and its gene status by dual-colour dual-hapten in-situ-hybridization (DDISH) study.

    MATERIALS AND METHODS: Retrospective study was performed on 767 referred breast cancer cases over a period of five years. The HER2 IHC score (the initial and repeat test score) and the results of HER2 gene status by DDISH were retrieved from the histopathological reports. The agreement between initial IHC score with repeat test score was measured using Cohen Kappa. Chi square test analyzed the association between HER2 IHC score with its gene status by DDISH.

    RESULTS: The concordance of HER2 IHC score between the initial and repeat test were 52.7% and 89.4% for IHC score 2+ and 3+ respectively. There was moderate agreement of HER2 IHC score between the initial and repeat test score (ϰ = 0.526, p<0.001). A significant association noted between HER2 IHC score with its gene status by DDISH (p<0.001). Only 56 out of 207 cases (27.1%) with 2+ IHC score showed HER2 gene amplification while the majority of cases with 3+ IHC score were gene-amplified (446 out of 451, 98.9%).

    CONCLUSION: ISH study should be done in all IHC-equivocal cases (2+) to select patient for targeted therapy. Gene amplification must also be confirmed in IHC-positive cases (3+) to prevent from giving non-effective treatment with possible adverse effects to patient with non-amplified HER2 gene.

    Matched MeSH terms: Chi-Square Distribution
  20. Chan AKH, Yusof MI, Abdullah MS
    Asian Spine J, 2021 Feb;15(1):1-8.
    PMID: 32252193 DOI: 10.31616/asj.2019.0242
    STUDY DESIGN: This is an observational study of computed tomography (CT) data.

    PURPOSE: The C1 and C2 laminas in the Malaysian Malay population were analyzed for the feasibility of fitting 3.5-mm laminar screws in a cross configuration.

    OVERVIEW OF LITERATURE: Morphometric analysis of the C1 and C2 laminas has been performed for various populations but not for the Malaysian Malay population.

    METHODS: A total of 330 CT cervical images were measured to establish the bicortical diameter of the C1 and C2 laminas as well as their height and length. The C1 posterior tubercle bicortical diameter and height were also determined from these images. All parameters were measured up to 0.1 mm, and statistical analysis was performed using IBM SPSS Statistics ver. 24.0 (IBM Corp., Armonk, NY, USA). An independent t -test and the Pearson chi-square test were used to determine the mean difference and screw acceptance.

    RESULTS: The means of the C1 lamina measurements were 5.79±1.19 mm in diameter, 9.76±1.51 mm in height, and 20.70±1.86 mm in length. The means of the measurements of the posterior tubercle were 7.20±1.88 mm in diameter and 10.51±1.68 mm in height. The means of the C2 lamina measurements were 5.74±1.31 mm in diameter, 11.76±1.69 mm in height, and 24.96±2.56 mm in length. Overall 65.5% of C1 and 80.3% of C2 laminas are able to accept 3.5-mm screws in a cross configuration. Screw acceptability is similar between the right and left sides (p >0.05). However, males have a higher screw acceptability compared with females (p <0.05), except for the C2 left lamina.

    CONCLUSIONS: It is feasible to insert a 3.5-mm screw in a cross configuration in the C1 and C2 laminas of the Malaysian Malay population, especially in males. However, a CT scan should be performed prior to the operation to determine screw acceptability and to estimate screw sizes.

    Matched MeSH terms: Chi-Square Distribution
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