scholarly journals Using Grass Germination to Measure the Toxicity of Household Substances & Teach Statistical Methods

2021 ◽  
Vol 83 (1) ◽  
pp. 42-47
Author(s):  
John Morris ◽  
Margie Winter
Keyword(s):  
Statistical Methods ◽  
Model Organism ◽  
Model System ◽  
Experimental Series ◽  
Chi Square ◽  
Grass Seed ◽  
Multiple Factors ◽  
Multifactor Experiment ◽  
Two Samples ◽  
Student’S T

We describe a series of three experiments in which students develop a model system for measuring the LC50 of household substances, using grass seed as the model organism. Students use statistical methods to compare two samples (using chi-square and Student’s t-tests), conduct a two-level multifactor experiment to look at multiple factors simultaneously and observe interactions, and make serial dilutions to measure the LC50 over a threefold concentration range. The experimental series was very inexpensive to run and tended to provide very successful LC50 measurements.

scholarly journals Identifikasi Kekeliruan Penggunaan Metode Statistika pada Artikel yang Dimuat di Jurnal OJS Unud

2019 ◽  
Vol 9 (1) ◽  
pp. 26
Author(s):  
Ni Luh Putu Suciptawati
Keyword(s):  
Statistical Methods ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Ordinal Scale ◽  
Small Samples ◽  
Research Use ◽  
Chi Square ◽  
Inappropriate Use ◽  
Two Samples ◽  
Chi Square Test

Abstract:  The statistical method plays a role in scientific research. Use of appropriate statistical methods in analyzing  data influences research conclusions. Misuse  statistical methods will lead to incorrect conclusions. This study aims to identify the misuse of statistical methods in articles published in the OJS UNUD Journals. We reviewed 97 articles from OJS UNUD Journals published in 2017. This study  found several  misuse statistical methods these included: misuse multiple linear regression analysis, generalize conclusions based on descriptive statistics, inappropriate use of  ANOVA, misinterpretation of negative correlation values, use of Chi square test for small samples, use of t-test two samples for observations with ordinal scale Keywords: statistical methods, misuse statistical, OJS UNUD Journal

Home ownership in Saudi Arabia: Spatial Dimensions

2018 ◽  
Author(s):  
Asharaf Abdul Salam
Keyword(s):  
Saudi Arabia ◽  
Standard Deviation ◽  
Detailed Analysis ◽  
Statistical Methods ◽  
Home Ownership ◽  
Ownership Type ◽  
Chi Square ◽  
Spatial Dimensions ◽  
One Way Anova

<p>This paper undertakes a detailed analysis of 2010 Census Population and Household Tables (Final), to assess governorate wise variations in home ownership, type of living accommodations and housing infrastructure - material used for construction, electricity, water and sewage facilities.</p> <p>The data published by the Ministry of Economics and Planning in its “Population and Housing, 2010 Census” analyzed in detail using SPSS20, applying statistical methods such as, cross tabulations and chi-square; mean and standard deviation; and One-Way ANOVA. Governorates classified into small, medium and large, according to the number of Saudi persons, have been analyzed across 13 regions quantifying homeownership status. Further governorates are classified according to the percentage of owning homes in order to analyze the type of living accommodations, built up material of housing, source of electricity, water and sewage facilities. </p> <br>

Home ownership in Saudi Arabia: Spatial Dimensions

2018 ◽  
Author(s):  
Asharaf Abdul Salam
Keyword(s):  
Saudi Arabia ◽  
Standard Deviation ◽  
Detailed Analysis ◽  
Statistical Methods ◽  
Home Ownership ◽  
Ownership Type ◽  
Chi Square ◽  
Spatial Dimensions ◽  
One Way Anova

<p>This paper undertakes a detailed analysis of 2010 Census Population and Household Tables (Final), to assess governorate wise variations in home ownership, type of living accommodations and housing infrastructure - material used for construction, electricity, water and sewage facilities.</p> <p>The data published by the Ministry of Economics and Planning in its “Population and Housing, 2010 Census” analyzed in detail using SPSS20, applying statistical methods such as, cross tabulations and chi-square; mean and standard deviation; and One-Way ANOVA. Governorates classified into small, medium and large, according to the number of Saudi persons, have been analyzed across 13 regions quantifying homeownership status. Further governorates are classified according to the percentage of owning homes in order to analyze the type of living accommodations, built up material of housing, source of electricity, water and sewage facilities. </p> <br>

PREEMPTIVE ANALGESIA WITH AMITRIPTYLINE IN WOMEN UNDERGOING ABDOMINAL HYSTERECTOMY: A RANDOMIZED CLINICAL TRIAL

2020 ◽  
pp. 2-5
Author(s):  
Antônio Henriques De França Neto ◽  
Alexandre Magno Nóbrega Marinho ◽  
Eveline Pereira De Arruda Agra ◽  
Priscilla Guimarães Alves ◽  
Josikwylkson Costa Brito ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Postoperative Pain ◽  
Pressure Pain Threshold ◽  
Abdominal Hysterectomy ◽  
Tricyclic Antidepressant ◽  
Preemptive Analgesia ◽  
Chi Square ◽  
Double Blind ◽  
Exact Test ◽  
Student’S T

The concept of preemptive analgesia, albeit long-standing, has reemerged. Consequently, recent research has focused on testing a variety of drugs preoperatively to prevent the occurrence of postoperative pain, a major factor of morbidity. Amitriptyline is a tricyclic antidepressant used to treat chronic pain. Because amitriptyline acts on pain transmission pathways, it could theoretically be used as an agent for the prevention of postoperative pain. This study evaluated the effectiveness of amitriptyline in preventing pain in patients submitted to hysterectomy, the most commonly performed gynecological surgery. A randomized, double-blind clinical trial was conducted with 145 patients, 72 of these receiving amitriptyline and 73 placebo. All patients were evaluated at 6, 12, 24 and 48 hours after surgery using a visual analog scale (VAS) for pain and algometry to determine the pressure-pain threshold. Statistical analysis was conducted using the chi-square test of association, Student's t-test, and the Mann-Whitney test, with Fisher's exact test being used whenever appropriate. No statistically signicant difference was found between the two groups with respect to pain at any of the time points evaluated, leading to the conclusion that at a dose of 25 mg, amitriptyline is ineffective in preventing postoperative pain in patients submitted to abdominal hysterectomy

scholarly journals A Randomized, Controlled, Parallel-Group, Trial on the Effects of Melatonin on Fatigue Associated with Breast Cancer and Its Adjuvant Treatments

2021 ◽  
Vol 20 ◽  
pp. 153473542098834
Author(s):  
Abdolazim Sedighi Pashaki ◽  
Kamal Mohammadian ◽  
Saeid Afshar ◽  
Mohammad Hadi Gholami ◽  
Abbas Moradi ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Adjuvant Chemotherapy ◽  
Intervention Group ◽  
Chi Square ◽  
Significance Level ◽  
Severe Fatigue ◽  
Before And After ◽  
Brief Fatigue Inventory ◽  
Chi Square Test ◽  
Student’S T

Objective: Fatigue associated with malignant conditions and their treatments is a disabling condition. This trial assessed the anti-fatigue effects of melatonin coadministration during adjuvant treatment of patients with the breast cancer. Material and Methods: Patients with breast cancer were randomly assigned to receive melatonin or placebo during adjuvant chemotherapy and radiotherapy. Thirty-seven patients were randomly enrolled in each group. The mean ages of patients in the intervention and control groups were 50.47 ± 10.79 and 46.05 ± 10.55 years, respectively ( P = .223). The intervention group received oral melatonin (18 mg/day) from 1 week before until 1 month after the adjuvant radiotherapy. The level of fatigue was assessed before and after intervention using Brief Fatigue Inventory (BFI) in both groups. To analyze data, the Student’s t-test and the Chi-square test were used at a significance level of P ≤ .05. Results: The BFI score was similar before the intervention in both groups, however, after the intervention, it was significantly lower in the melatonin group ( P < .001). Moreover, the frequency of severe fatigue in the melatonin group was significantly lower than in the placebo group after intervention (42.1% vs 83.3%, P < .001). Conclusion: Coadministration of melatonin during adjuvant chemotherapy and radiotherapy of women with breast cancer decreased the levels of fatigue associated with the malignant condition and its treatments.

scholarly journals Seroepidemiological study of toxoplasmosis in women referred to a pre-marriage counseling center in Alborz Province, Iran

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Melica Shahighi ◽  
Aliehsan Heidari ◽  
Hossein Keshavarz ◽  
Amir Bairami ◽  
Saeedeh Shojaee ◽  
...  
Keyword(s):  
Congenital Toxoplasmosis ◽  
Pcr Analysis ◽  
Women Of Childbearing Age ◽  
Childbearing Age ◽  
Serum Samples ◽  
Chi Square ◽  
Igg Avidity ◽  
Two Samples ◽  
Chi Square Test ◽  
Associated Risk Factors

Abstract Objectives The aim of the current study was to assess prevalence of Toxoplasma infection and its associated risk factors in women of childbearing-age in central Iran. Results Of 400 serum samples assessed for anti-T. gondii antibodies, 81 (20.25%) samples were positive for anti-T. gondii antibodies, including 74 positive samples (91.3%) for anti-T. gondii IgG and seven positive samples (8.7%) for IgG and IgM. Of seven IgG and IgM positive samples, five and two samples were high and low in IgG avidity, respectively. Based on PCR analysis, Toxoplasma infection was detected in one sample with anti-T. gondii IgM and low IgG avidity. The Chi-square test showed significant correlations of T. gondii seropositivity with history of undercooked meat consumption and contacts with cats (p < 0.05). In the present study, 79.75% of the participants were negative for IgG against T. gondii infection. Furthermore, recently acquired Toxoplasma infection was found using IgG avidity and PCR assays among women of childbearing-age in the study area, which would increase the risk of their fetus becoming infected. Educational program and antenatal screening of childbearing-age women for T. gondii infection may be important primary prevention strategies and help reduce the risk of congenital toxoplasmosis in this population.

scholarly journals Frequency of dementia among elderly admitted to a Geriatrics Inpatients Sector of a Brazilian public hospital

2018 ◽  
Vol 12 (1) ◽  
pp. 35-39 ◽  
Author(s):  
Rafael Thomazi ◽  
Liciana Vaz de Arruda Silveira ◽  
Paulo José Fortes Villas Boas ◽  
Alessandro Ferrari Jacinto
Keyword(s):  
Univariate Analysis ◽  
The Elderly ◽  
Sociodemographic Factors ◽  
University Hospital ◽  
Chi Square ◽  
Diagnosis Of Dementia ◽  
Elderly Inpatients ◽  
Chi Square Test ◽  
Student’S T ◽  
Clinical Conditions

ABSTRACT Patients with dementia are commonly admitted to inpatient sectors. The aim of this study was to describe the frequency of dementia among elderly inpatients admitted to the Geriatrics Sector of a Brazilian Tertiary University Hospital, and to identify associations between dementia and clinical and sociodemographic factors. Methods: All patients admitted to the Geriatrics Sector of a public Brazilian university-hospital from March 1st 2014 to January 31st 2015 were assessed by geriatricians. The patients were divided into groups "with or without diagnosis of dementia". Univariate analysis was performed between these two groups using the Chi-Square Test, Student's t-test or the Mann-Whitney Test. Results: One hundred and three elderly inpatients, with a mean age of 82 (±7.9) years, were assessed. Overall, 74.7% had low educational level (<4 years), 66% used polypharmacy, 57.2% developed delirium during hospitalization and 59% were totally dependent for basic activities of daily living. The diagnosis of dementia was observed in 59 (57%) subjects. Conclusion: The frequency of dementia was high among the elderly inpatients evaluated. The association between dementia and certain clinical conditions, such as incontinence, delirium and use of psychoactive drugs, was in line with the medical literature.

scholarly journals Implications of the Model EFQM as a Strategic Management Tool in Practice: A Case of Slovak Tourism Sector

2019 ◽  
Vol 10 (18) ◽  
pp. 47-62 ◽  
Author(s):  
Ján Dobrovič ◽  
Ľubomír Kmeco ◽  
Peter Gallo ◽  
Peter Gallo, jr.
Keyword(s):  
Strategic Management ◽  
Statistical Methods ◽  
Business Performance ◽  
Management Tool ◽  
Chi Square ◽  
Comprehensive Management ◽  
Efqm Model ◽  
Chi Square Test ◽  
Proportion Method ◽  
Tourism Enterprises

The article focuses on the use of a strategic management tool, especially the EFQM model. The EFQM Excellence Model is a comprehensive management tool used to assess and improve business performance. In this article we focused on the use of this model in tourism enterprises in Slovakia. The main goal of the paper was to carry out research on the use of this model and to identify barriers that prevent the use of this model in managing and increasing the performance of businesses active in tourism. The research was based on formulated hypotheses, which we verified using statistical methods. As suitable statistical methods to verify hypotheses we chose the population proportion method and the Chi-square test of independence. The hypotheses were formulated on the basis of the available literature, published articles and research carried out so far. We also described the reasons that prevent the use of the EFQM model and analyzed the relevant context using a standard deviation. The aim of our paper was to find out the current state of use of the mentioned model and to present the model as a suitable tool for increasing the performance of businesses not only in the field of tourism.

scholarly journals Clinical and biological profiles of older adults aged 50 and over compared to those under 50 in people living with HIV attending Kinshasa University Teaching Hospital (DR Congo)

2021 ◽  
Vol 5 (2) ◽  
pp. 087-095
Author(s):  
Mbula MMK ◽  
Longo-Mbenza B ◽  
Situakibanza HNT ◽  
Mananga GL ◽  
Makulo JRR ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Teaching Hospital ◽  
University Teaching ◽  
People Living With Hiv ◽  
Chi Square ◽  
Stage 4 ◽  
History Of ◽  
Student’S T ◽  
Living With Hiv ◽  
Student’S T Test

Background: The survival of people living with HIV (PLWHIVs) is increased and Health systems will have to deal with the early-aging-associated medical conditions. Objective: The objective of this study is to compare the clinical and biological profiles of PLWHIVs aged 50 and over and those aged less than 50 years. Material and methods: This study conducted at Kinshasa University Teaching Hospital (KUTH) covers 6 years. The clinical and biological characteristics of PLWHIVs aged 50 and over were compared with those under 50. Statistical analysis used the means ± SD, the calculation of frequencies, Student’s t-test and Chi-square. Results: PLWHIVs aged 50 or over represented 35.1%. Their average age was 58.0 ± 4.8 years. Women predominate among those under 50 and men among those 50 and over. Married people were more numerous (54% among those under 50). There were more unemployed (50% of PLHIV under 50). Patients 50 years and older were significantly classified as WHO stage 4 with a high frequency of history of tuberculosis, genital herpes, high blood pressure, smoking, vomiting, hepatomegaly, moderate elevation of diastolic blood pressure (DBP) and sytolic blood pressure (SBP), tuberculosis and anemia. Those under 50 had a significantly increased frequency of shingles, hepatitis B-hepatitis C, headaches and more survivals. The mean of Hb, HDL-C, and CD4s+ were significantly lower in patients 50 years and older, and urea, LDL-C, and ALAT levels were significantly higher. Conclusion: The average age was higher from 50 years old. These PLWHIVs were more frequently in WHO stage 4 with more common TB and anemia. Their Hb, HDL-C, and CD4s+ levels were lower while their urea, LDL-C and ALAT levels were significantly elevated.

scholarly journals Effect of ondansetron on spinal induced hypotension in caesarean deliveries

2020 ◽  
Vol 8 (4) ◽  
pp. 193-199
Author(s):  
Pujan Balla ◽  
Anil Shrestha ◽  
Ninadini Shrestha ◽  
Navindra Bista ◽  
Moda Nath Marhatta
Keyword(s):  
Spinal Anesthesia ◽  
Elective Caesarean Section ◽  
P Value ◽  
Chi Square ◽  
Induced Hypotension ◽  
Intergroup Comparison ◽  
Chi Square Test ◽  
The Mean ◽  
Student’S T ◽  
Student’S T Test

Background: Spinal anesthesia is the preferred technique of anesthesia employed for caesarean sections. However, it is very often complicated by hypotension. Different drugs and techniques have been used to prevent the hypotension induced by spinal anesthesia. In this study, the effect of ondansetron on the prevention of hypotension after spinal anesthesia was evaluated. Objectives: To determine the effect of prophylactic ondansetron on prevention of spinal induced hypotension in elective caesarean section. Methodology: Eighty-six parturients planned for elective caesarean deliveries were randomized into two groups of 43 each. Group O received Ondansetron 4 mg (4 ml) and Group S received Normal Saline (4 ml) intravenously 10 minutes prior to spinal anesthesia. Blood pressure, heart rate, phenylephrine requirements, occurrence of nausea and vomiting and APGAR scores of neonates were compared between the groups. Hemodynamic data was analyzed using Student’s t-test for intergroup comparison and ANOVA was used for intragroup comparison. Categorical data was analyzed using Pearson Chi-Square test. For all determinants, p-value <0.05 was considered significant. Results: Occurrence of hypotension in Group O (20.9 %) was significantly lower than in Group S (72.1%) (p < 0.05). The mean arterial pressure was significantly higher in Group O at 2, 6, 8, 12 and 14 minutes (p < 0.05). The use of phenylephrine (37.21 mcg vs. 146.51 mcg, p < 0.05) and occurrence of nausea (11.6%, vs. 41.9% p < 0.002) was significantly lower in ondansetron group. Conclusion: Ondansetron is effective in preventing spinal induced hypotension in elective caesarean sections.

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