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Darkroom prone provocative test in primary angle closure glaucoma relatives

Zahari M, Ong YM, Taharin R, Ramli N

Optom Vis Sci, 2014 Apr;91(4):459-63.
PMID: 24637481 DOI: 10.1097/OPX.0000000000000220

To evaluate ocular biometric parameters and darkroom prone provocative test (DPPT) in family members of primary angle closure (PAC) glaucoma (PACG) patients and to establish any correlation between these biometric parameters and the DPPT response.

Matched MeSH terms: Biometry/methods
The prevalence of Helicobacter pylori in patients with oesophageal stenosis

Ylmaz Ö, Temur A, Almal N, Dülger AC, Sasmaz MI

Trop Biomed, 2018 Dec 01;35(4):1148-1153.
PMID: 33601862

Oesophageal strictures often occur following esophagectomy which is performed for cases of oesophageal cancer. These patients require repeated dilation procedures. The aim of this study is to investigate the effects of dietary regimens, which are changed because of stenosis, caused by Helicobacter pylori (H. pylori). In this retrospective study, 28 patients who had operation for oesophageal cancer and underwent dilation due to development of stricture were studied. 30 female and 30 male patients who were admitted to the Gastroenterology Clinic with complaints of dyspepsia and did not receive treatment for the eradication of H. pylori were randomly selected and included in this study as a control group. Patients' histopathological records on the hemogram, biochemistry, and endoscopic biopsy were analysed. There were 26 H. pylori (+) cases (92.8 %) in the stenosis group consisting of 28 patients, and 37 H. pylori (+) cases (61.6%) in the control group consisting of 60 patients. These results were found to be statistically significant (P=0.003). The albumin level in the stenosis group was reported to be statistically low (P=0.002). The incidence of H. pylori was found to be significantly higher in patients with stenosis. We ascribed this outcome due to changes in dietary regimens. Our findings showed that the dietary regimens of all patients who underwent esophagectomy should be regulated during the postoperative period considering H. pylori. The relationship between H. pylori and stenosis was significant, there is a need for further research with a larger sample size to enrich the findings.

Matched MeSH terms: Biometry
Fulltext An image encryption scheme based on public key cryptosystem and quantum logistic map

Ye G, Jiao K, Huang X, Goi BM, Yap WS

Sci Rep, 2020 Dec 03;10(1):21044.
PMID: 33273539 DOI: 10.1038/s41598-020-78127-2

Most of existing image encryption schemes are proposed in the spatial domain which easily destroys the correlation between pixels. This paper proposes an image encryption scheme by employing discrete cosine transform (DCT), quantum logistic map and substitution-permutation network (SPN). The DCT is used to transform the images in the frequency domain. Meanwhile, the SPN is used to provide the security properties of confusion and diffusion. The SPN provides fast encryption as compared to the asymmetric based image encryption since operations with low computational complexity are used (e.g., exclusive-or and permutation). Different statistical experiments and security analysis are performed against six grayscale and color images to justify the effectiveness and security of the proposed image encryption scheme.

Matched MeSH terms: Biometry
Fulltext How many roads must a Malaysian walk down? Mapping the accessibility of radiotherapy facilities in Malaysia

Yahya N, Sukiman NK, Suhaimi NA, Azmi NA, Manan HA

PLoS One, 2019;14(3):e0213583.
PMID: 30897166 DOI: 10.1371/journal.pone.0213583

BACKGROUND: The accessibility to radiotherapy facilities may affect the willingness to undergo treatment. We sought to quantify the distance and travel time of Malaysian population to the closest radiotherapy centre and to estimate the megavoltage unit (MV)/million population based on the regions.
MATERIALS & METHODS: Data for subdistricts in Malaysia and radiotherapy services were extracted from Department of Statistics Malaysia and Directory of Radiotherapy Centres (DIRAC). Data from DIRAC were validated by direct communication with centres. Locations of radiotherapy centres, distance and travel time to the nearest radiotherapy were estimated using web mapping service, Google Map.
RESULTS: The average distance and travel time from Malaysian population to the closest radiotherapy centre were 82.5km and 83.4mins, respectively. The average distance and travel were not homogenous; East Malaysia (228.1km, 236.1mins), Central (14.4km, 20.1mins), East Coast (124.2km, 108.8mins), Northern (42.9km, 42.8mins) and Southern (36.0km, 39.8mins). The MV/million population for the country is 2.47, East Malaysia (1.76), Central (4.19), East Coast (0.54), Northern (2.40), Southern (2.36). About 25% of the population needs to travel >100 km to get to the closest radiotherapy facility.
CONCLUSION: On average, Malaysians need to travel far and long to reach radiotherapy facilities. The accessibility to radiotherapy facilities is not equitable. The disparity may be reduced by adding centres in East Malaysia and the East Coast.

Matched MeSH terms: Biometry
Automated otolith image classification with multiple views: an evaluation on Sciaenidae

Wong JY, Chu C, Chong VC, Dhillon SK, Loh KH

J Fish Biol, 2016 Aug;89(2):1324-44.
PMID: 27364089 DOI: 10.1111/jfb.13039

Combined multiple 2D views (proximal, anterior and ventral aspects) of the sagittal otolith are proposed here as a method to capture shape information for fish classification. Classification performance of single view compared with combined 2D views show improved classification accuracy of the latter, for nine species of Sciaenidae. The effects of shape description methods (shape indices, Procrustes analysis and elliptical Fourier analysis) on classification performance were evaluated. Procrustes analysis and elliptical Fourier analysis perform better than shape indices when single view is considered, but all perform equally well with combined views. A generic content-based image retrieval (CBIR) system that ranks dissimilarity (Procrustes distance) of otolith images was built to search query images without the need for detailed information of side (left or right), aspect (proximal or distal) and direction (positive or negative) of the otolith. Methods for the development of this automated classification system are discussed.

Matched MeSH terms: Biometry/methods*
Fulltext The graphical assessment of multivariate normality using SPSS

Wan Nor Arifin

Education in Medicine Journal, 2015;7(2):71-75.
MyJurnal

Multivariate analyses depend on multivariate normality assumption. Although the analyses are available in SPSS, it is not possible to assess the assumption from the basic package. Statistical assessment of the normality is available in a specialized package, SPSS Amos, in form of Mardia's multivariate kurtosis. However, graphical assessment of the normality by chi-square versus Mahalanobis distance plot is not available in both of the packages. The aim of this article is to present the steps to construct the plot in SPSS in a point-and-click manner as expected by most SPSS users.

Matched MeSH terms: Biometry
Fulltext Creating artificial data for teaching of statistics

Wan Nor Arifin

Education in Medicine Journal, 2011;3(1):69-77.
MyJurnal

For the purpose of teaching statistics, lecturers often rely on data from real studies, text book examples or painstakingly created datasets. The process of creating a dataset can be made easier with the utilization of PASW Statistics to generate random values. The objective of this article is to demonstrate the creation of data which are measured on continuous scale, using PASW Statistics menus and syntax.

Matched MeSH terms: Biometry
Fulltext Introduction to sample size calculation

Wan Nor Arifin

Education in Medicine Journal, 2013;5(2):89-96.
MyJurnal

One of the most common reasons why researchers seek help from statistician is sample size calculation. However despite the common believe that it only involves formula and calculation, researchers often ignore other aspects of research design that leads to proper sample size calculation. In this article, the author outlines basic steps toward sample size calculation. The author also introduces the logic behind sample size calculation for single mean and single proportion in simplified and less intimidating forms to those not statistically inclined.

Matched MeSH terms: Biometry
Fulltext A new strategy of handling general insurance modelling using applied linear method

Wan Muhamad Amir W. Ahmad, Mohamad Arif Awang Nawi, Mustafa Mamat

Malaysian Journal of Applied Sciences, 2018;1(1):45-54.
MyJurnal

This paper proposes the use of bootstrap, robust and fuzzy multiple linear regressions method in
handling general insurance in order to get improved results. The main objective of bootstrapping is to
estimate the distribution of an estimator or test statistic by resampling one's data or a model estimated
from the data under conditions that hold in a wide variety of econometric applications. In addition,
bootstrap also provides approximations to distributions of statistics, coverage probabilities of confidence
intervals, and rejection probabilities of hypothesis tests that produce accurate results. In this paper, we
emphasize the combining and modelling using bootstrapping, robust and fuzzy regression methodology.
The results show that alternative methods produce better results than multiple linear regressions (MLR)
model.

Matched MeSH terms: Biometry
Fulltext A Survey on Medical, Dental, and Pharmacy Students' Knowledge, Attitude, and Practice about Hepatitis B Infection in a Private Medical University of Malaysia

Upadhyay DK, Manirajan Y, Iqbal MZ, Paliwal N, Pandey S

J Res Pharm Pract, 2020 10 08;9(3):128-134.
PMID: 33489980 DOI: 10.4103/jrpp.JRPP_20_8

Objective: The present study aimed to assess the knowledge, attitude, and practice (KAP) of 3rd- and 4th-year medical, dental, and pharmacy students about hepatitis B (HB) infection at a private medical university, Malaysia.
Methods: A cross-sectional, questionnaire-based study was conducted among 482 medical, dental, and pharmacy students of 3rd- and 4th-year degree program of Asian Institute of Medicine, Science and Technology University to assess their KAP about HB infection using 34 prevalidated questions by convenient sampling method. A questionnaire was administered to the students, and their responses were measured at "yes" and "no" scale. Students' responses were entered in SPSS version 22, and quantitative analysis was performed using descriptive statistics and nonparametric tests at P < 0.05.
Findings: The medical, dental, and pharmacy students had good knowledge and practice with positive attitude about HB infection. Mann-Whitney U-test determined a significant difference in knowledge (P < 0.001) and practice (P < 0.001) scores between medical and pharmacy, attitude (P < 0.001) scores between medical and dental, and attitude (P < 0.001) and practice (P < 0.001) scores between pharmacy and dental students. Students' age was correlated with their attitude, practice, and KAP scores and family income with their knowledge, attitude, practice, and KAP scores.
Conclusion: Although students' knowledge and practice were good with positive attitude, all the students did not participate in health education program, screening, and vaccination of hepatitis B virus (HBV) infection which makes them more vulnerable to occupational HBV infection. Hence, it is recommended to organize a regular health education program for the students on screening and vaccination against HBV to prevent its infection.

Matched MeSH terms: Biometry
Fulltext Academic procrastination and self-efficacy among a group of dental undergraduate students in Malaysia

Uma E, Lee CH, Shapiai SNHBM, Binti Mat Nor AN, Soe HHK, Varghese E

J Educ Health Promot, 2020;9:326.
PMID: 33426130 DOI: 10.4103/jehp.jehp_195_20

BACKGROUND: Undergraduate dental students have to do multiple tasks as part of their extensive curriculum in order to achieve the proficiencies expected of them. During the course of their study, a tendency to procrastinate and question their self-efficacy is detrimental for the students. The aim of this study was to evaluate the level of procrastination and self-efficacy and its related factors among dental undergraduate students.
SUBJECTS AND METHODS: This cross-sectional study was conducted among all (n = 361) consented dental undergraduate students of our dental school. A twenty-item Lay's Procrastination Scale for student population and a ten-item General Self-Efficacy Scale were used for the study after getting institutional ethical approval. The quantitative data were explained using descriptive statistics. Independent sample t-test and ANOVA were used to determine the association between self-efficacy, academic procrastination, and genders and academic years. Pearson correlation coefficient was used to determine the association between self-efficacy and procrastination. Multiple linear regression analysis was performed to determine the related factors to academic procrastination.
RESULTS: High procrastination (score ≥62) was seen among 28.5% of students. The mean self-efficacy score was 29.5. There was no significant difference between genders for procrastination scores (P = 0.835) and between academic years (P = 0.226). Males showed significantly more self-efficacy (P < 0.001), and self-efficacy did not show any significant difference (P = 0.204) between academic years though a tendency for year 5 students to have lower self-efficacy scores was observed. Academic procrastination was negatively correlated with self-efficacy (r = -0.238 and P < 0.001).
CONCLUSIONS: For dental undergraduates who have cognitive load as well as work associated with patients, procrastination and self-efficacy are negatively correlated.

Matched MeSH terms: Biometry
Random multispace quantization as an analytic mechanism for BioHashing of biometric and random identity inputs

Teoh AB, Goh A, Ngo DC

IEEE Trans Pattern Anal Mach Intell, 2006 Dec;28(12):1892-901.
PMID: 17108365

Biometric analysis for identity verification is becoming a widespread reality. Such implementations necessitate large-scale capture and storage of biometric data, which raises serious issues in terms of data privacy and (if such data is compromised) identity theft. These problems stem from the essential permanence of biometric data, which (unlike secret passwords or physical tokens) cannot be refreshed or reissued if compromised. Our previously presented biometric-hash framework prescribes the integration of external (password or token-derived) randomness with user-specific biometrics, resulting in bitstring outputs with security characteristics (i.e., noninvertibility) comparable to cryptographic ciphers or hashes. The resultant BioHashes are hence cancellable, i.e., straightforwardly revoked and reissued (via refreshed password or reissued token) if compromised. BioHashing furthermore enhances recognition effectiveness, which is explained in this paper as arising from the Random Multispace Quantization (RMQ) of biometric and external random inputs.

Matched MeSH terms: Biometry/methods*
Fulltext Anthropometric characteristics of Malay nose- a pilot study

Tengku Fazrina Tengku Mohd Arif, Farah Farhana Muhamad Hanafi, Nur Wardah Hanis Abdul Razak, Narissaporn Chaiprakit, Hazmyr Abdul Wahab

ESTEEM Academic Journal, 2020;16(2):11-20.
MyJurnal

Anthropometric analysis provides the most reliable comparison of the body forms by using specific landmarks determined in respect of anatomical prominences. The knowledge of unique shape, anatomy and dimensions of the nose is very useful for surgeon undertaking its repair and reconstruction. Prosthetic rehabilitation also requires the ability to imagine the position and dimension of the nose within the facial proximity. Therefore, the access to nasal data for each
population are advantageous. The aims were to measure parameters of external nose of a Malay population and to determine the significant difference in nose value parameters between gender and age group. The direct anthropometric measurements were carried out in 86 Malay subjects within the age range of 18 to 55 years old who attended UiTM dental clinic. Nasal landmarks were
identified, and the nose parameters were measured using digital calliper. The values were expressed as mean, standard deviation and range. Nasal height, width and length of the nasal bridge were higher in male. The intercanthal width and philtrum length were statistically not significant for both genders. There were significant differences in nasal width, philtrum length, intercanthal width and outer intercommisural mouth width between the three age groups. However, the height of the nose, length of the nasal bridge and nasal index between age group were statistically not significant. The male population and the 41-55 years age group have higher nose value parameters. The most common type of nose was platyrrhine: broad. This study also suggested that Malay population have medium broad nose as the nasal index for both genders was ≤ 84.90.

Matched MeSH terms: Biometry
Fulltext The feasibility of a public-private mix program on pulmonary tuberculosis screening in Penang: A pilot study

Tang WS, Chan MW, Kow FP, Ambigapathy R, Wong JHW, Thiruvengadam V, et al.

Malays Fam Physician, 2021 Mar 25;16(1):75-83.
PMID: 33948145 DOI: 10.51866/oa1096

Background: The low detection rate of tuberculosis (TB) cases in Malaysia remains a challenge in the effort to end TB by 2030. The collaboration between private and public health care facilities is essential in addressing this issue. As of now, no private-public health care collaborative program in pulmonary tuberculosis (PTB) screening exists in Malaysia.
Aim: To determine the feasibility of a collaborative program between private general practitioners (GPs) and the public primary health clinics in PTB screening and to assess the yield of smear-positive PTB from this program.
Methods: A prospective cohort study using convenient sampling was conducted involving GPs and public health clinics in the North-East District, Penang, from March 2018 to May 2019. In this study, GPs could direct all suspected PTB patients to perform a sputum acid fast bacilli (AFB) direct smear in any of the dedicated public primary health clinics. The satisfaction level of both the GPs and their patients were assessed using a self-administered client satisfaction questionnaire. IBM SPSS Statistical Software was used to analyze the data.
Results: Out of a total of 31 patients who underwent the sputum investigation for PTB, one (3.2%) was diagnosed to have smear-positive PTB. Most of the patients (>90%) and GPs (66.7%) agreed to continue with this program in the future. Furthermore, most of the patients (>90%) were satisfied with the program structure.
Conclusion: It is potentially feasible to involve GPs in combating TB. However, a more structured program addressing the identified issues is needed to make the collaborative program a success.

Matched MeSH terms: Biometry
Fulltext FNG-IE: an improved graph-based method for keyword extraction from scholarly big-data

Tahir N, Asif M, Ahmad S, Malik MSA, Aljuaid H, Butt MA, et al.

PeerJ Comput Sci, 2021;7:e389.
PMID: 33817035 DOI: 10.7717/peerj-cs.389

Keyword extraction is essential in determining influenced keywords from huge documents as the research repositories are becoming massive in volume day by day. The research community is drowning in data and starving for information. The keywords are the words that describe the theme of the whole document in a precise way by consisting of just a few words. Furthermore, many state-of-the-art approaches are available for keyword extraction from a huge collection of documents and are classified into three types, the statistical approaches, machine learning, and graph-based methods. The machine learning approaches require a large training dataset that needs to be developed manually by domain experts, which sometimes is difficult to produce while determining influenced keywords. However, this research focused on enhancing state-of-the-art graph-based methods to extract keywords when the training dataset is unavailable. This research first converted the handcrafted dataset, collected from impact factor journals into n-grams combinations, ranging from unigram to pentagram and also enhanced traditional graph-based approaches. The experiment was conducted on a handcrafted dataset, and all methods were applied on it. Domain experts performed the user study to evaluate the results. The results were observed from every method and were evaluated with the user study using precision, recall and f-measure as evaluation matrices. The results showed that the proposed method (FNG-IE) performed well and scored near the machine learning approaches score.

Matched MeSH terms: Biometry
Fulltext RELATIONSHIP BETWEEN BODY DISSATISFACTION ANDEATING DISORDER OF UNIVERSITY STUDENTS

TUAN NOR ATIQAH SYAFIQAH TUAN ABD AZIZ, MADIHAH SHUKRI

UMT Journal of Undergraduate Research, 2019;1(2):36-40.
MyJurnal

This study examined the relationship between body dissatisfaction and eating disorder of undergraduate students in University Malaysia Terengganu (UMT). Using stratified random sampling technique, data from 299 respondents was gathered. Body dissatisfaction was measured using Body Shape Questionnaire while eating disorders were assessed using Eating Attitudes Test. Descriptive statistics showed thatthe majority of the respondents reported no symptom of body dissatisfaction. With regard to eating disorders, respondents reported low levels of dieting, bulimia and oral control, indicating that an eating disorder in this sample was somewhat low. T-test analyses showed that there were no significant gender differences in body dissatisfaction as well as in eating disorders. However, there was evidence to suggest that female respondents had slightly higher level of eating disorder than males. Results of Pearsoncorrelations showed there was significant relationship between body dissatisfaction and total score of eating disorders, dieting, bulimia and oral control subtypes (r = .58, p

Matched MeSH terms: Biometry
Development and implementation of a web-based system to study children with malnutrition

Syed-Mohamad SM

Comput Methods Programs Biomed, 2009 Jan;93(1):83-92.
PMID: 18789553 DOI: 10.1016/j.cmpb.2008.07.011

To develop and implement a collective web-based system to monitor child growth in order to study children with malnutrition.

Matched MeSH terms: Biometry
A Multivariate Measure of Dispersion and its Limiting Distribution (Ukuran Multivariat bagi Dispersi dan Hal Taburannya)

Suwanda Idris

Sains Malaysiana, 2005;34.

Total Variance (TV) and Generalized Variance (GV) are commonly used as a measure multivariate dispersion. However, these two statistics has some drawbacks. This paper proposes a new measure of multivariate dispersion, named Vectorial Variance (VV) an inner product for set of operators defined on a Hilbert-Smith space. Since, the exact sampling distribution of VV is difficult to find, therefore the asymptotic sampling distribution is obtained.
[Jumlah Varians dan Varians Teritlak kebiasaannya digunakan sebagai ukuran dispersi multivariate. Namun begitu, kedua-dua statistik ini mempunyai beberapa kelemahan. Dalam tulisan ini akan dicadankgan satu ukuran dispersi multivariate yang baru, dikenali sebagai varians bervektor (VV) yang merupakan suatu hasil darab terkedalam bagi set pengoperasi yang tertakrif ke atas suatu ruang Hilbert-Smith. Oleh kerana taburan pensampilan tepat dari statistik vv tersebut sangat sukar untuk ditentukan, maka taburan pensampilan asimtot telah diperolehi].

Matched MeSH terms: Biometry
Fulltext Correlation of the anterior ocular segment biometry with HbA1c level in type 2 diabetes mellitus patients

Suraida AR, Ibrahim M, Zunaina E

PLoS One, 2018;13(1):e0191134.
PMID: 29324896 DOI: 10.1371/journal.pone.0191134

OBJECTIVES: To compare the anterior ocular segment biometry among Type 2 diabetes mellitus (DM) with no diabetic retinopathy (DR) and non-proliferative diabetic retinopathy (NPDR), and to evaluate the correlation of anterior ocular segment biometry with HbA1c level.
METHODS: A cross-sectional study was conducted in Hospital Universiti Sains Malaysia, Kelantan from November 2013 till May 2016 among Type 2 DM patients (DM with no DR and DM with NPDR). The patients were evaluated for anterior ocular segment biometry [central corneal thickness (CCT), anterior chamber width (ACW), angle opening distance (AOD) and anterior chamber angle (ACA)] by using Anterior Segment Optical Coherence Tomography (AS-OCT). Three ml venous blood was taken for the measurement of HbA1c.
RESULTS: A total of 150 patients were included in this study (DM with no DR: 50 patients, DM with NPDR: 50 patients, non DM: 50 patients as a control group). The mean CCT and ACW showed significant difference among the three groups (p < 0.001 and p = 0.015 respectively). Based on post hoc result, there were significant mean difference of CCT between non DM and DM with NPDR (mean difference 36.14 μm, p < 0.001) and also between non DM and DM with no DR (mean difference 31.48 μm, p = 0.003). The ACW was significantly narrower in DM with NPDR (11.39 mm SD 0.62) compared to DM with no DR (11.76 mm SD 0.53) (p = 0.012). There were no significant correlation between HbA1c and all the anterior ocular segment biometry.
CONCLUSION: Diabetic patients have significantly thicker CCT regardless of retinopathy status whereas ACW was significantly narrower in DM with NPDR group compared to DM with no DR. There was no significant correlations between HbA1c and all anterior ocular segment biometry in diabetic patients regardless of DR status.

Matched MeSH terms: Biometry/methods*
Fulltext Infrapatellar fat pad resection or preservation during total knee arthroplasty: a meta-analysis of randomized controlled trials

Sun C, Zhang X, Lee WG, Tu Y, Li H, Cai X, et al.

J Orthop Surg Res, 2020 Aug 05;15(1):297.
PMID: 32758250 DOI: 10.1186/s13018-020-01823-2

BACKGROUND: The infrapatellar fat pad (IPFP) or Hoffa's fat pad is often resected during total knee arthroplasty in order to improve visibility. However, the management of the IPFP during total knee arthroplasty (TKA) is the subject of an ongoing debate that has no clear consensus. The purpose of this review was to appraise if resection of the IPFP affects clinical outcomes.
METHODS: We conducted a meta-analysis to identify relevant randomized controlled trials involving infrapatellar fat pad resection and infrapatellar fat pad preservation during total knee arthroplasty in electronic databases, including Web of Science, Embase, PubMed, Cochrane Controlled Trials Register, Cochrane Library, Highwire, CBM, CNKI, VIP, and Wanfang database, up to March 2020.
RESULTS: Nine randomized controlled trials, involving 783 TKAs (722 patients), were included in the systematic review. Outcome measures included patellar tendon length (PTL), Insall-Salvati ratio (ISR), rate of anterior knee pain, Knee Society Scores (KSS), and knee range of motion. The meta-analysis identified a trend toward the shortening of the patellar tendon with IPFP resection at 6 months (P = 0.0001) and 1 year (P = 0.001). We found no statistical difference in ISR (P = 0.87), rate of anterior knee pain within 6 months (p = 0.45) and 1 year (p = 0.38), KSS at 1 year (p = 0.77), and knee range of motion within 6 months (p = 0.61) and 1 year (0.46).
CONCLUSION: Based on the available level I evidence, we were unable to conclude that one surgical technique of IPFP can definitively be considered superior over the other. More adequately powered and better-designed randomized controlled trial (RCT) studies with long-term follow-up are required to produce evidence-based guidelines regarding IPFP resection.

Matched MeSH terms: Biometry

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