Multivariate Statistical Tests Research Articles

‘THE QUOTIDIAN OF THE SYMBOLIC’. ICONOGRAPHIC CHANGES BETWEEN DECORATED OBJECTS IN CANTABRIAN MAGDALENIAN PORTABLE ART. A MULTIVARIATE STATISTICAL APPROACH

SummaryCantabrian portable art enjoys a long research tradition that has generated a vision of this phenomenon in which decoration seems to be determined by the type of artefact to be decorated and the context in which it participates. However, this conceptualization does not address the multiplicity of situations in which decorated objects were used. In the present work, both the iconographic variations in Cantabrian Magdalenian decorated objects and the diachronic changes in the use of the themes and artefacts are explored. For this, a quantitative analysis has been carried out and multivariate statistical tests have been applied on a sample of 293 objects that are distributed among 47 sites. The results point to a much more complex evolution of portable graphic activity in relation to the selection of the themes represented and the objects that were decorated.

Hispanic race is a risk factor for COVID-19 during pregnancy: data from an urban New York City hospital

There are limited studies on predisposing factors for COVID-19 positivity in asymptomatic pregnant women. The literature published to date on asymptomatic COVID-19 pregnant carriers does not focus on pregnancy or pre-pregnancy comorbidities. We wanted to identify risk factors for COVID-19 in asymptomatic pregnant women. We performed a retrospective chart review of 263 asymptomatic pregnant women admitted to labour and delivery at New York City Health + Hospitals/Lincoln. We analysed the association between race, body mass index (BMI), smoking, indication for admission, gravidity, parity, pre-pregnancy comorbidity, pregnancy comorbidity via uni- and multivariate statistical tests. Only Hispanic race was significant in the univariate analysis (p = .049). At the post-hoc analysis, Hispanics had a higher proportion of COVID-19 cases compared to non-Hispanic Blacks (p = .019). No variables were significantly associated with COVID-19 positivity in the multivariate analysis. Hispanic race appears to be a risk factor for asymptomatic COVID-19 infection during pregnancy. We speculate that the cultural and socioeconomic reality of Hispanic women living in our community leads to more exposure opportunities and therefore, a higher infection rate. Impact statement What is already known on this subject? Little is known on the role of comorbidities and risk factors that can favour COVID-19 infection during pregnancy. What do the results of this study add? We found that Hispanic pregnant asymptomatic women had a higher rate of COVID-19 in comparison to non-Hispanic Black women. Pre-pregnancy comorbidities such as pregestational diabetes, hypertension and asthma were not associated with COVID-19 positivity. What are the implications of these findings for clinical practice and/or further research? The reasons why the Hispanic race is more affected by COVID-19 during pregnancy is unclear. The social environment of Hispanic women living in our community, such as their tendency to live in multigenerational and multi-family households, might contribute to a higher infection rate. More resources might be dedicated in the future to Hispanic-dense neighbourhoods.

Differential Willingness to Pay for Kidney Transplantation From Living and Deceased Donors: Empirical Study Among End-Stage Kidney Disease (ESKD) Patients.

Kidney transplantation has developed to the stage where it is currently the most cost-effective treatment for patients suffering from end-stage kidney disease (ESKD) and, when available, offers them the highest quality of life. Yet, kidney transplantation is challenged by cultural and traditional beliefs; thus, this study sought to evaluate the willingness to pay for a kidney transplant in a culturally sensitive population. A self-administered survey was completed by 734 end-stage kidney disease (ESKD) patients. A quantitative method and survey design were chosen and employed descriptive, correlational, nonparametric, and multivariate statistical tests. Participants were willing to pay a mean amount of $40 751.36 for a living donor kidney transplant, whereas the mean is considerably lower, $18 350.51, for a deceased donor kidney. Significant predictors of the willingness to pay (WTP) for a kidney transplant from a living donor and a deceased donor were found, among them: religiosity and ethnicity. The participants' willingness to pay for a kidney transplant could attest to significant benefits in enhancing patient well-being. The willingness to pay differentially for a donation from a deceased or a living donor stems from the higher chances of success with a living-donor organ as well as from moral and religious motives. In Israel kidney transplantation is not tradable in the free market and is fully funded by the state. The average cost of kidney transplantation in Israel is $61 714.50. Since the cost exceeds the utility and since the economic literature suggests that the funding of healthcare interventions should be provided up to the point where the costs of that funding equal the benefits that society derives from it, crucial revisions in public health policy should be made. Education may have a significant impact on the approach to kidney donation and organ donation in general.

Multivariate analysis of chemical parameters of cocoa: a contribution to origin designation / Análise multivariada de parâmetros químicos do cacau: uma contribuição para a denominação de origem

Brazil has been trying to become a key player in the specialized market through the production of fine chocolate. However, there is still no rules about the chemical quality of cocoa beans that allows it to be grouped by micro-regions. In this context, the objective of this work was to determine some chemical parameters of cocoa samples, aiming to contribute to the creation of the designation of origin for the cocoa produced in the south of Bahia. For this propose, proteins, lipids, total minerals, and fatty acid profile analysis were performed. The results obtained were correlated using multivariate statistical tests. The chemical composition of the cocoa beans, allowed to differentiate samples of cocoa, revealing the formation of three groups of samples. The two main components (lipids and proteins) were analysed together, characterizing the producing region. Regarding the analysis of the fatty acid profile, they showed that the cocoa harvested in the main season presents a higher influence of saturated fatty acids, while in the early season the higher influence is of unsaturated fatty acids. Multivariate techniques were able to group the different types of cocoa according to their chemical profile, helping to create an origin denomination for those produced in Southern Bahia.

The genetic architecture of human cortical folding.

The folding of the human cerebral cortex is a highly genetically regulated process that allows for a much larger surface area to fit into the cranial vault and optimizes functional organization. Sulcal depth is a robust yet understudied measure of localized folding, previously associated with multiple neurodevelopmental disorders. Here, we report the first genome-wide association study of sulcal depth. Through the multivariate omnibus statistical test (MOSTest) applied to vertex-wise measures from 33,748 U.K. Biobank participants (mean age, 64.3 years; 52.0% female), we identified 856 genome-wide significant loci (P < 5 × 10−8). Comparisons with cortical thickness and surface area indicated that sulcal depth has higher locus yield, heritability, and effective sample size. There was a large amount of genetic overlap between these traits, with gene-based analyses indicating strong associations with neurodevelopmental processes. Our findings demonstrate sulcal depth is a promising neuroimaging phenotype that may enhance our understanding of cortical morphology.

The Promising Ethics And Competitive Advantage On Higher Education As A Part Of International Collaboration Programs

Promises ethics in service triangle context on higher education can be met if performance improves superior performance and be given the implications for competitive advantage. The purpose of this study was to analyze and determine promising ethics in service marketing triangle and competitive advantage of higher education. The research method used is survey method, namely descriptive and explanatory. The number of respondents in the study is 330 students of the polytechnic in West Java, which is determined by sampling technique, which is cluster proportional random sampling. The hypothesis testing was done using a multivariate statistical test of the Partial Least Square (PLS). The data processing was done with smartPLS 2.0 programs and Statistical Programs of Social Science (SPSS) for Windows. The results show that: The promising ethics in service triangle context and competitive advantage influence as well but not quite good. The promising ethics in service marketing triangle context can be met also if performance improves international collaboration on higher education as well, so that promises ethics can be achieved optimally and be given the implications for competitive advantage of higher education.

The Promising Ethics And Competitive Advantage On Higher Education As A Part Of International Collaboration Programs

Promises ethics in service triangle context on higher education can be met if performance improves superior performance and be given the implications for competitive advantage. The purpose of this study was to analyze and determine promising ethics in service marketing triangle and competitive advantage of higher education. The research method used is survey method, namely descriptive and explanatory. The number of respondents in the study is 330 students of the polytechnic in West Java, which is determined by sampling technique, which is cluster proportional random sampling. The hypothesis testing was done using a multivariate statistical test of the Partial Least Square (PLS). The data processing was done with smartPLS 2.0 programs and Statistical Programs of Social Science (SPSS) for Windows. The results show that: The promising ethics in service triangle context and competitive advantage influence as well but not quite good. The promising ethics in service marketing triangle context can be met also if performance improves international collaboration on higher education as well, so that promises ethics can be achieved optimally and be given the implications for competitive advantage of higher education.

Health literacy in Germany

Studies have shown that the health literacy of the German population is low. The aim of this article is to analyze current developments in health literacy on the basis of recent data. The Health Literacy Survey Germany 2 (HLS-GER 2) is a representative quantitative survey of the German-speaking resident population of Germany aged 18 and above. It was carried out in December 2019 and January 2020 by paper- assisted personal oral interview (PAPI). Data on health literacy and socio - demographic characteristics were acquired with an internationally coordinated questionnaire. The instrument for measuring general health literacy consisted of 47 questions that reflect an individual's ability to access, understand, appraise, and apply health-related information. The associations between general health literacy and sociodemographic factors were analyzed using bivariate and multivariate statistical tests. 58.8% of the participants had low health literacy, characterized by rating at least one-third of the questions as "difficult" or "very difficult." Many respondents stated that they had difficulties accessing (48.3%), understanding (47.7%), and applying (53.5%) information, and even more of them (74.7%) reported difficulties appraising information. The correlation coefficients reveal that health literacy is weakly associated with the following variables: age, sex, social status, literacy, level of education, financial deprivation, migration background, and the presence of one or more chronic diseases. The findings of the HLS-GER 2 highlight the need for action in pro - moting health literacy in the healthcare system. As the explanation of variance is low, there are presumably other important determinants of health literacy that were not taken into account. Further studies should be performed to investigate societal conditions of supplying health information, for example, or social and personal characteristics.

Untargeted metabolomics towards understanding molecular mechanisms of pulmonary arterial hypertension

Abstract Background Pulmonary hypertension constitutes a rare disease characterized by a severe development and a high risk of premature death. One of its main clinical types is pulmonary arterial hypertension (PAH), in which the highest percentage of patients are affected by idiopathic PAH. The pathogenesis of this disease has not completely been discovered and elucidated so far, and non-specific clinical symptoms make the diagnosis of PAH a serious problem. Currently, PAH is confirmed with invasive examination based on right heart catheterization. Purpose The main aim of the study was to evaluate and compare both plasma and urine fingerprints of PAH patients and control group with the use of an untargeted metabolomics approach. The study also focused on correlation analysis between the observed metabolic changes and the clinical parameters to select specific indicators of PAH disease. Methods An untargeted metabolomics approach was applied to the plasma and urine samples with the use of gas chromatography coupled to triple quadrupole mass spectrometry (GC-QqQ/MS) and advanced statistical tests were applied to evaluate the potential metabolic indicators of PAH. The PAH patients (n=40) and healthy controls (n=39) were matched for age, sex, BMI and included in the study. The obtained raw datasets were properly processed (data deconvolution, signal correction using QCSVR method and PQN normalization) and subsequently subjected to uni- and multivariate statistical tests (Student's t-test, Welch's test, U Mann-Whitney test, PCA and OPLS-DA). The identification of the statistically significant metabolites was performed using universal libraries, such as: Fiehn's and NIST11. Results The statistically significant metabolites (n=10 and 11 for urine and plasma samples, respectively)originate from various biochemical pathways associated with the carbohydrate, amino acid, lipid, fatty acid and pyrimidine metabolism. The metabolic changes observed in the urine samples of PAH patients (compared to the control group) included different concentrations in: threonic acid, hippuric acid, acetic acid, sorbitol, butanoic acid and propionic acid. The metabolic alterations in the plasma samples covered changes in the levels of valine, leucine, lactic acid, hydroxybutanoic acid, nonanoic acid, cholesterol and octadecanoic acid. Metabolites representing the highest correlation with mean pulmonary arterial pressure include, for instance: propionic acid (r=0.85), valine (r=0.75) and lactic acid (r=0.63) Conclusions The observed metabolic changes are related to various biological processes that are disturbed in the course of PAH, namely: proliferation of pulmonary vascular cells or the functions of cardiomyocytes and the right ventricle of the heart. The obtained results confirmed the potential of a metabolomics approach to uncover and explain the underlying molecular mechanisms of PAH. Funding Acknowledgement Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Ministry of Science and High Education of Poland

Statistical analysis of periodic data in neuroscience

Many experimental paradigms in neuroscience involve driving the nervous system with periodic sensory stimuli. Neural signals recorded using a variety of techniques will then include phase-locked oscillations at the stimulation frequency. The analysis of such data often involves standard univariate statistics such as T-tests, conducted on the Fourier amplitude components (ignoring phase), either to test for the presence of a signal, or to compare signals across different conditions. However, the assumptions of these tests will sometimes be violated because amplitudes are not normally distributed, and furthermore weak signals might be missed if the phase information is discarded. An alternative approach is to conduct multivariate statistical tests using the real and imaginary Fourier components. Here the performance of two multivariate extensions of the T-test are compared: Hotelling’s T2 and a variant called Tcirc2. A novel test of the assumptions of Tcirc2 is developed, based on the condition index of the data (the square root of the ratio of eigenvalues of a bounding ellipse), and a heuristic for excluding outliers using the Mahalanobis distance is proposed. The Tcirc2 statistic is then extended to multi-level designs, resulting in a new statistical test termed ANOVAcirc2. This has identical assumptions to Tcirc2, and is shown to be more sensitive than MANOVA when these assumptions are met. The use of these tests is demonstrated for two publicly available empirical data sets, and practical guidance is suggested for choosing which test to run. Implementations of these novel tools are provided as an R package and a Matlab toolbox, in the hope that their wider adoption will improve the sensitivity of statistical inferences involving periodic data.

Effect of hypnobreastfeeding on the success of exclusive breastfeeding in pregnant women trimester III in Puskesmas Bungursari Tasikmalaya

&lt;p&gt;&lt;strong&gt;&lt;em&gt;Background:&lt;/em&gt;&lt;/strong&gt;&lt;em&gt; Prevalence of stunting in Indonesia as much as 35.6%, government efforts in stunting prevention with the First 1000 Days of Life (HPK). The age of infants 0-6 months is one of the hpk period with nutritional needs is Exclusive breast milk. Mothers who have difficulties at the beginning of breastfeeding such as fatigue, feeling a little breast milk, putting milk blisters, nighttime sleep disorders, can be a source of stress of the mother, so it can interfere with the lactation process. Hypnobreastfeeding is able to bring a sense of relaxing, comfortable and calm during breastfeeding thus that the whole system in the body will run much more perfectly so that the process of breastfeeding becomes a meaningful and pleasant process for mothers and babies, Hypnobreastfeeding can meet the needs of breast milk so that the mother succeeds in lactation. &lt;/em&gt;&lt;/p&gt;&lt;p&gt;&lt;strong&gt;&lt;em&gt;Objectives&lt;/em&gt;&lt;/strong&gt;&lt;strong&gt;&lt;em&gt;:&lt;/em&gt;&lt;/strong&gt;&lt;em&gt; This study aims to find out how the effect of hypnobreastfeeding is done in pregnant women trimester III and seen how successful exclusive breastfeeding. &lt;/em&gt;&lt;/p&gt;&lt;p&gt;&lt;strong&gt;&lt;em&gt;Methods:&lt;/em&gt;&lt;/strong&gt;&lt;em&gt; This study uses quasi experiment method, sampling technique non randomised clinical trial in pregnant women trimester 3 with the number of research 30 people consists of 15 treatment groups and 15 control groups. Univariate and bivariate analysis using chi-square and multivariate statistical tests using logistic regression. &lt;/em&gt;&lt;/p&gt;&lt;p&gt;&lt;strong&gt;&lt;em&gt;Results :&lt;/em&gt;&lt;/strong&gt;&lt;em&gt; The results of the study obtained hypnobreastfeeding has a meaning with a value of p&amp;lt;0.05 ddan the effect caused by 13.00 times greater than health education with a value of OR 13.00 95% CI and coefficient determinants showed that hypnobreastfeeding predicted to affect the success of exclusive breastfeeding, &lt;/em&gt;&lt;/p&gt;&lt;strong&gt;&lt;em&gt;Conclusions&lt;/em&gt;&lt;/strong&gt;&lt;em&gt; : Hypnobreastfeeding conclusion positively influenced the success of exclusive breastfeeding.&lt;/em&gt;

EFFECTS OF GEOMECHANICAL PROPERTIES ON MATERIALS ADHESIVITY

Material properties is one of the most significant variables in terms of efficiency. The sediment layer in a coal pit mine has a possibility of sticking to the equipment bucket and reducing its productivity, especially in the disposal area. Consequently, stickiness has a close definition of adhesivity level; thus it may be associated with geomechanical properties. Various soil classification in the disposal area was investigated to identify the relationship between adhesivity and geomechanical properties such as water content, density, cohesion, and internal friction angles. Multivariate regression analysis and statistical test (F-test and t-test) were used to investigate geomechanical properties related to adhesivity on each disposal area. Primary data was taken from a standard and modified laboratory testing. The results showed that disposal materials were high-plasticity materials with different grain-sizes. The dominant grain size on disposal 1, 2, and 3 were clay, sand, and clay, respectively. Based on regression analysis, the adhesivity on each disposal was increased along with the water content until its optimum value. Using a statistical test with a significance level of 95% (P-value 0.04), water content, cohesion and internal friction angle affected the adhesivity level on disposal 1 by 99% (adjusted R2 0.99). Adhesivity level in disposal 2 was only affected with density by 63% (adjusted R2 0.63). Meanwhile, in disposal 3, the significance level of 33% (P-value 0.50) was used to define that water content, cohesion, and internal friction angle as parameters affecting adhesivity level by 33% (adjusted R2 0.33).

The Relation between the Characteristics of Parents and the Incidence of Stunting in Elementary School Children in the Working Area of the Air Beliti Health Center

Stunting is a failure of growth and development experienced by children due to inadequate nutritional intake for a long time, recurrent infectious diseases, and inadequate psychosocial stimulation. The incidence of stunting is higher in rural areas than in urban areas. This study aims to analyze the relationship between maternal characteristics and the incidence of stunting in elementary school children in the Air Beliti Health Center working area. The study was conducted on elementary school children in the working area of the Air Beliti Health Center, Musi Rawas Regency. The design of this study used a cross-sectional design, with a total sample of 84 respondents who were taken randomly and met the inclusion criteria. Determination of stunting is based on anthropometric measurements, while the characteristics of parents are assessed using a questionnaire. Furthermore, the data were analyzed using Univariate, Bivariate, and Multivariate statistical tests. The results of anthropometric measurements showed that children who experienced stunting were 41 people, 48.8%. Based on the characteristics of the parents, it was found that 54.8% of fathers and 50% of mothers had low education, 65.5% of fathers and 75% of mothers worked as farmers, 58.3% of parents had low economic status, and 51.2% parents marry at a young age. There is a significant relationship between married age (p = 0.049), maternal education (0.029), and stunting incidence. Based on the multivariate test results, it was found that the most dominant factor related to the incidence of stunting was the age at marriage (p = 0.000; OR = 80.079). Parents who marry in their teens have a risk of 80,079 times having stunting children. Conclusion: adolescent marriage is associated with the incidence of stunting in elementary school children in the work area of the Air Beliti Health Center.

Characterization of Primary Muscle Tension Dysphonia Using Acoustic and Aerodynamic Voice Metrics

Objectives/HypothesisThe objectives of this study were to (1) identify optimal clusters of 15 standard acoustic and aerodynamic voice metrics recommended by the American Speech-Language-Hearing Association (ASHA) to improve characterization of patients with primary muscle tension dysphonia (pMTD) and (2) identify combinations of these 15 metrics that could differentiate pMTD from other types of voice disorders. Study DesignRetrospective multiparametric MethodsRandom forest modeling, independent t-tests, logistic regression, and affinity propagation clustering were implemented on a retrospective dataset of 15 acoustic and aerodynamic metrics. ResultsTen percent of patients seen at the New York University (NYU) Voice Center over two years met the study criteria for pMTD (92 out of 983 patients), with 65 patients with pMTD and 701 of non-pMTD patients with complete data across all 15 acoustic and aerodynamic voice metrics. PCA plots and affinity propagation clustering demonstrated substantial overlap between the two groups on these parameters. The highest ranked parameters by level of importance with random forest models—(1) mean airflow during voicing (L/sec), (2) mean SPL during voicing (dB), (3) mean peak air pressure (cmH2O), (4) highest F0 (Hz), and (5) CPP mean vowel (dB)—accounted for only 65% of variance. T-tests showed three of these parameters—(1) CPP mean vowel (dB), (2) highest F0 (Hz), and (3) mean peak air pressure (cmH2O)—were statistically significant; however, the log2-fold change for each parameter was minimal. ConclusionComputational models and multivariate statistical testing on 15 acoustic and aerodynamic voice metrics were unable to adequately characterize pMTD and determine differences between the two groups (pMTD and non-pMTD). Further validation of these metrics is needed with voice elicitation tasks that target physiological challenges to the vocal system from baseline vocal acoustic and aerodynamic ouput. Future work should also place greater focus on validating metrics of physiological correlates (eg, neuromuscular processes, laryngeal-respiratory kinematics) across the vocal subsystems over traditional vocal output measures (eg, acoustics, aerodynamics) for patients with pMTD. Level of EvidenceII

Speech-Driven Spectrotemporal Receptive Fields Beyond the Auditory Cortex

We recently developed a method to estimate speech-driven spectrotemporal receptive fields (STRFs) using fMRI. The method uses spectrotemporal modulation filtering, a form of acoustic distortion that renders speech sometimes intelligible and sometimes unintelligible. Using this method, we found significant STRF responses only in classic auditory regions throughout the superior temporal lobes. However, our analysis was not optimized to detect small clusters of STRFs as might be expected in non-auditory regions. Here, we re-analyze our data using a more sensitive multivariate statistical test for cross-subject alignment of STRFs, and we identify STRF responses in non-auditory regions including the left dorsal premotor cortex (dPM), left inferior frontal gyrus (IFG), and bilateral calcarine sulcus (calcS). All three regions responded more to intelligible than unintelligible speech, but left dPM and calcS responded significantly to vocal pitch and demonstrated strong functional connectivity with early auditory regions. Left dPM's STRF generated the best predictions of activation on trials rated as unintelligible by listeners, a hallmark auditory profile. IFG, on the other hand, responded almost exclusively to intelligible speech and was functionally connected with classic speech-language regions in the superior temporal sulcus and middle temporal gyrus. IFG's STRF was also (weakly) able to predict activation on unintelligible trials, suggesting the presence of a partial ‘acoustic trace’ in the region. We conclude that left dPM is part of the human dorsal laryngeal motor cortex, a region previously shown to be capable of operating in an ‘auditory mode’ to encode vocal pitch. Further, given previous observations that IFG is involved in syntactic working memory and/or processing of linear order, we conclude that IFG is part of a higher-order speech circuit that exerts a top-down influence on processing of speech acoustics. Finally, because calcS is modulated by emotion, we speculate that changes in the quality of vocal pitch may have contributed to its response.

Comparison of Four MANOVA Test Statistic for Pig Production in Delta State, Nigeria

This study used the multivariate analysis of variance (MANOVA) test statistic to examine the impact of three categories feed used in the production of pig in Delta State. The multivariate test statistic considered are the Pillai – Bartlett trace, Wilks’ Test Statistic, Roy’s Largest Root Test Statistic, and the Lawley- Hotelling (LH) Statistic. The objectives include to: evaluate the robustness of the four Multivariate Analysis of Variance test statistics to ensure that the best is employed in multivariate analysis to guarantee most useful result in pig production; determine the relatively efficient test statistic for pig production; and determine the test statistic that is consistent across the sample sizes. Secondary source of data collection was used to obtain the data required for the analysis. The outcome of the study showed that the obtained data was multivariate normally distributed based on the result of the asymmetry-based multivariate normality test and the multivariate normality test based on the kurtosis test which makes the data suitable parametric multivariate method such as multivariate analysis of variance (MANOVA). The results show that the Wilks and Roy tests found a significant difference for the intercept. While the Pillai and LH tests could not find any significance. The Roy test was also found to be significant for feed one, feed two, and feed three. The Wilks and Roy tests also turned out to be significant differences for the intercept. All test measures showed significance for feed one. The Wilks and Roy tests also showed a significant difference for feed two, while all test measures found a significance for feed one. Another result showed that none of the tests found significance for the interaction between feed one and two, while the Roy test found significance for the interaction between feed one and three, feed two and three and feed one, two and three. The performance of the test for evaluating the performance of feeds for pig production with/without considering interactions was found to be in the following order of magnitude: Roy, Wilks and Pilla = LH. This result implies that the Roy method, with or without consideration of the interaction, has a better performance of the test than the other methods considered in the study.

Comparison of Four MANOVA Test Statistic for Pig Production in Delta State, Nigeria

This study used the multivariate analysis of variance (MANOVA) test statistic to examine the impact of three categories feed used in the production of pig in Delta State. The multivariate test statistic considered are the Pillai – Bartlett trace, Wilks’ Test Statistic, Roy’s Largest Root Test Statistic, and the Lawley- Hotelling (LH) Statistic. The objectives include to: evaluate the robustness of the four Multivariate Analysis of Variance test statistics to ensure that the best is employed in multivariate analysis to guarantee most useful result in pig production; determine the relatively efficient test statistic for pig production; and determine the test statistic that is consistent across the sample sizes. Secondary source of data collection was used to obtain the data required for the analysis. The outcome of the study showed that the obtained data was multivariate normally distributed based on the result of the asymmetry-based multivariate normality test and the multivariate normality test based on the kurtosis test which makes the data suitable parametric multivariate method such as multivariate analysis of variance (MANOVA). The results show that the Wilks and Roy tests found a significant difference for the intercept. While the Pillai and LH tests could not find any significance. The Roy test was also found to be significant for feed one, feed two, and feed three. The Wilks and Roy tests also turned out to be significant differences for the intercept. All test measures showed significance for feed one. The Wilks and Roy tests also showed a significant difference for feed two, while all test measures found a significance for feed one. Another result showed that none of the tests found significance for the interaction between feed one and two, while the Roy test found significance for the interaction between feed one and three, feed two and three and feed one, two and three. The performance of the test for evaluating the performance of feeds for pig production with/without considering interactions was found to be in the following order of magnitude: Roy, Wilks and Pilla = LH. This result implies that the Roy method, with or without consideration of the interaction, has a better performance of the test than the other methods considered in the study.

Chemotaxonomic Study of Four Subspecies of Pinus nigra Arn. Grown in Common Garden Based on Essential Oil Composition

The aim of this study was to investigate the chemical diversity of Pinus nigra Arn. essential oils. The research was carried out on the needles collected from eighteen provenances of black pine grown in common garden located in West-Northern Tunisia and belonging to four different subspecies (Pinus nigra subsp. nigra, Pinus nigra subsp. salzmannii, Pinus nigra subsp. pallasiana, and Pinus nigra subsp. laricio). Essential oil yields ranged from 0.19% to 0.68%. The obtained essential oils have been analyzed by GC-FID and GC-MS apparatus. Twenty-three constituents accounting about 98% of total essential oil composition were identified. The essential oil compositions appeared to be very different according to their origin. Thus, five main essential oil chemotypes were identified in Pinus nigra plants: caryophyllene oxide, camphene, ß-caryophyllene, α-amorphene, and germacrene D. The chemotaxonomic value of the essential oil compositions was discussed in relation to the results of the multivariate statistical test, including a detailed survey of the available literature data.

Urinary Tract Stones Risk Factors in Patients with Benign Prostatic Hyperplasia in West Java, Indonesia

Background: Urinary tract stones are common in patients with benign prostatic hyperplasia (BPH); therefore, an imaging test is needed for patients who have risk factors for the formation of urinary tract stones. The purpose of this study was to explore the factors associated with the presence of urinary tract stones in patients with BPH as information to conduct imaging tests.Methods: A cross-sectional quantitative analytic study was conducted on medical records of patients with BPH, both with and without urinary tract stones, or patients with urinary tract stones registered at the Department of Urology, Dr. Hasan Sadikin General Hospital, Indonesia, from 2015 to 2018. Data on age, body mass index, hypertension, use of antihypertensive drugs, diabetes mellitus, and hyperuricemia were collected and analyzed using the Mann-Whitney, Chi-square, Fisher exact test, and multivariate logistic regression statistical test to compare variables between BPH with and without urinary tract stones.Results: In total, 235 BPH patients were registered, of whom 74 (31.5%) had urinary tract stones. The median age was 64 years old. There was a relationship between age (p=0.030), diabetes mellitus (p=0.043), and the occurrence of urinary tract stones in patients with BPH. The most dominant risk factor was diabetes mellitus (OR=3.000, 95%CI 1.03-8.69).Conclusions: Age and diabetes mellitus are the risk factors for urinary tract stones in patients with BPH. BPH patients with diabetes mellitus are at a 3-fold risk for urinary tract stones. Diabetes mellitus in BPH patients is an indication to conduct imaging tests.

EVALUATING THE LEVEL OF TEACHER PERFOMANCE: PEDAGOGIC, SOCIAL AND PERSONAL COMPETENCY

This study aims to evaluate the level of competency of history teachers in Jember. Competency indicators are pedagogical competence, social competence and personality competence based on the perspective of students. This research used quantitative analyzed using inference statistics to analyze differences in teacher competence according to gender and teaching experience. The research sample involved 100 students across five schools. Data analysis used SPSS with multivariate statistical tests. This study indicates a significant difference between teacher pedagogical competence based on gender and teacher social competence based on the level of teaching experience. This study reflects that competency development is still needed to improve teacher competence to improve learning quality.