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Proper use of statistics

Flavia Westphal, Suzete Maria Fustinoni, Vânia Lopes Pinto, Patrícia de Souza Melo, Anelise Riedel Abrahão
Objective: To identify the profile of women seen in a Fetal Medicine unit, diagnosed with fetal abnormality incompatible with neonatal survival in their current pregnancy, and to check the association of gestational age upon diagnosis with the option of pregnancy termination. Methods: This is a retrospective cohort study carried out in the Fetal Medicine Outpatients Clinic of a university hospital, in the city of São Paulo (SP), Brazil, using medical records of pregnant women with fetus presenting abnormalities incompatible with neonatal survival...
July 2016: Einstein
Katrine Kveli Fjukstad, Anne Engum, Stian Lydersen, Ingrid Dieset, Nils Eiel Steen, Ole A Andreassen, Olav Spigset
OBJECTIVE: The aim of the present study was to examine the effect of selective serotonin reuptake inhibitors (SSRIs) on cardiovascular risk factors in patients with schizophrenia or bipolar disorder. METHOD: We used data from a cross-sectional study on 1301 patients with schizophrenia or bipolar disorder, of whom 280 were treated with SSRIs. The primary outcome variable was the serum concentration of total cholesterol. Secondary outcome variables were low-density lipoprotein (LDL) cholesterol, high-density lipoprotein cholesterol, triglyceride and glucose levels, body mass index, waist circumference, and systolic and diastolic blood pressure...
October 3, 2016: Journal of Clinical Psychopharmacology
Tom Porter, Alison Rushton
BACKGROUND: Injury prevention measures might reduce the impact of injury on footballers and football clubs. Increasing research has evaluated the use of exercise for injury prevention. However, research has focused on adolescent females. No high-quality systematic reviews have evaluated the efficacy of all forms of exercise on preventing injury in adult male football. OBJECTIVE: Our objective was to conduct a systematic review to evaluate the efficacy of exercise in preventing injury in adult male football...
December 2015: Sports Medicine—Open
Aradhana Nagarsekar, Ridhima Gaunkar, Meena Aras
OBJECTIVE: This survey was undertaken to assess dentist's opinion regarding the occurrence and pattern of food impaction in relation to fixed partial denture (FPD) prostheses, its commonly observed consequences, factors contributing to it, and its management. METHODS: A descriptive survey was conducted on a sample size of 150 dental practitioners. The pro forma consisted of informed consent, demographic information, and questionnaire. The results were tallied and quantitative analysis was performed to obtain the descriptive statistics for the data using SPSS version 20...
October 2016: Journal of Indian Prosthodontic Society
Lei Zheng, Zhengtao Liu, Zhenguang Yan, Yahui Zhang, Xianliang Yi, Juan Zhang, Xin Zheng, Junli Zhou, Yan Zhu
Pentachlorophenol (PCP) has been reported toxic to aquatic organisms, and it frequently occurs at relatively high concentrations in most Chinese waters due to the re-emergence of schistosomiasis since 2003. Several studies about Water Quality Criteria (WQC) for PCP had been performed to protect the aquatic ecosystem, but in most of these studies the toxicity data were not properly analyzed (e.g. screening and processing methods). Moreover, little study was carried out on the ecological risk assessment (ERA) based on environmental factors...
October 13, 2016: Ecotoxicology and Environmental Safety
Uros Kuzmanov, Hongbo Guo, Diana Buchsbaum, Jake Cosme, Cynthia Abbasi, Ruth Isserlin, Parveen Sharma, Anthony O Gramolini, Andrew Emili
Phospholamban (PLN) plays a central role in Ca(2+) homeostasis in cardiac myocytes through regulation of the sarco(endo)plasmic reticulum Ca(2+)-ATPase 2A (SERCA2A) Ca(2+) pump. An inherited mutation converting arginine residue 9 in PLN to cysteine (R9C) results in dilated cardiomyopathy (DCM) in humans and transgenic mice, but the downstream signaling defects leading to decompensation and heart failure are poorly understood. Here we used precision mass spectrometry to study the global phosphorylation dynamics of 1,887 cardiac phosphoproteins in early affected heart tissue in a transgenic R9C mouse model of DCM compared with wild-type littermates...
October 14, 2016: Proceedings of the National Academy of Sciences of the United States of America
Guillem Rigaill, Sandrine Balzergue, Véronique Brunaud, Eddy Blondet, Andrea Rau, Odile Rogier, José Caius, Cathy Maugis-Rabusseau, Ludivine Soubigou-Taconnat, Sébastien Aubourg, Claire Lurin, Marie-Laure Martin-Magniette, Etienne Delannoy
Numerous statistical pipelines are now available for the differential analysis of gene expression measured with RNA-sequencing technology. Most of them are based on similar statistical frameworks after normalization, differing primarily in the choice of data distribution, mean and variance estimation strategy and data filtering. We propose an evaluation of the impact of these choices when few biological replicates are available through the use of synthetic data sets. This framework is based on real data sets and allows the exploration of various scenarios differing in the proportion of non-differentially expressed genes...
October 14, 2016: Briefings in Bioinformatics
Nooshin Atashfeshan, Hamideh Razavi
OBJECTIVE: Analysis of the effect of mental fatigue on a cognitive task and determination of the right start time for rest breaks in work environments. BACKGROUND: Mental fatigue has been recognized as one of the most important factors influencing individual performance. Subjective and physiological measures are popular methods for analyzing fatigue, but they are restricted to physical experiments. Computational cognitive models are useful for predicting operator performance and can be used for analyzing fatigue in the design phase, particularly in industrial operations and inspections where cognitive tasks are frequent and the effects of mental fatigue are crucial...
October 13, 2016: Human Factors
Xuewei Wang, Xingzhong Liu, Johannes Z Groenewald
The phylum Neocallimastigomycota contains eight genera (about 20 species) of strictly anaerobic fungi. The evolutionary relationships of these genera are uncertain due to insufficient sequence data to infer their phylogenies. Based on morphology and molecular phylogeny, thirteen isolates obtained from yak faeces and rumen digesta in China were assigned to Neocallimastix frontalis (nine isolates), Orpinomyces joyonii (two isolates) and Caecomyces sp. (two isolates), respectively. The phylogenetic relationships of the eight genera were evaluated using complete ITS and partial LSU sequences, compared to the ITS1 region which has been widely used in this phylum in the past...
October 12, 2016: Antonie Van Leeuwenhoek
Zulfiqar Ali, S Bala Bhaskar
Statistical methods involved in carrying out a study include planning, designing, collecting data, analysing, drawing meaningful interpretation and reporting of the research findings. The statistical analysis gives meaning to the meaningless numbers, thereby breathing life into a lifeless data. The results and inferences are precise only if proper statistical tests are used. This article will try to acquaint the reader with the basic research tools that are utilised while conducting various studies. The article covers a brief outline of the variables, an understanding of quantitative and qualitative variables and the measures of central tendency...
September 2016: Indian Journal of Anaesthesia
Dilip Kumar Kulkarni
It important to properly collect, code, clean and edit the data before interpreting and displaying the research results. Computers play a major role in different phases of research starting from conceptual, design and planning, data collection, data analysis and research publication phases. The main objective of data display is to summarize the characteristics of a data and to make the data more comprehensible and meaningful. Usually data is presented depending upon the type of data in different tables and graphs...
September 2016: Indian Journal of Anaesthesia
Scott Hardison, Wen Wan, Kelley M Dodson
OBJECTIVES: 1) Describe the origins of the use of propranolol in the treatment of subglottic hemangiomas, 2) Perform meta-analysis of all case reports and series in which propranolol was used to treat subglottic hemangiomas. STUDY DESIGN: Literature review and meta-analysis. METHODS: A total of 61 cases were identified from 19 scholarly articles. Cases were assessed by parameters including age at diagnosis, presence of other hemangiomas, percent airway obstructed, dose of propranolol, treatment duration, age at therapy termination, use of steroids, and treatment failure...
November 2016: International Journal of Pediatric Otorhinolaryngology
Ali A Asadi-Pooya, Jennifer Tinker, Elizabeth Fletman
PURPOSE: We classified patients with psychogenic nonepileptic seizures (PNESs) according to a newly proposed classification system. Then, we investigated the demographic and clinical differences between various classes of the patients. METHODS: We retrospectively investigated all patients with PNESs admitted to the Jefferson Comprehensive Epilepsy Center from 2012 through 2016. We classified the patients into four distinct classes: patients with generalized motor seizures, patients with akinetic seizures, patients with focal motor seizures, and patients with seizures with subjective symptoms...
October 7, 2016: Epilepsy & Behavior: E&B
Marco Tallarico, Erta Xhanari, Milena Pisano, Giacomo De Riu, Antonio Tullio, Silvio Mario Meloni
PURPOSE: To test the hypothesis that there is no difference in clinical, radiographic and aesthetic outcomes positioning single post-extractive ultra-wide 7 mm-diameter implants or waiting 4 months to place implant, after molar extraction and the socket preservation procedure. MATERIAL AND METHODS: Patients requiring one implant-supported single restoration to replace a failed tooth in the molar region of both maxilla and mandible were selected. Patients were randomised according to a parallel group design into two arms: implant installation in fresh extraction sockets augmented with corticocancellous heterologous bone and porcine derma (group A) or delayed implant installation 4 months after tooth extraction and socket preservation using the same materials (group B)...
2016: European Journal of Oral Implantology
Shirish Dattatraya Yande, Omkar Vinay Joglekar, Maya Joshi
INTRODUCTION: Role of urodynamics prior to surgery of stress urinary incontinence (SUI) is under constant debate. Demonstration of the presence of detrusor overactivity is the only aspect that has been emphasized in the literature so far. We believe that there are number of other factors which may influence the evaluation and in turn the choice of surgical management and prediction of outcome of treatment. They are as follows: (1) Presence of voiding inefficiency, (2) asymptomatic detrusor overactivity, (3) and severity of SUI...
July 2016: Journal of Mid-life Health
Kai-Hsiang Kang, Li-Fen Kuo, I-Chen Cheng, Chih-Shiuh Chang, Wen-Ing Tsay
BACKGROUND/PURPOSE: According to WHO guideline, the consumption of opioids is an important sign of national progress in cancer pain relief. However, precise data on the consumption of opioid analgesics consumption in Taiwan has not been published. We investigate opioid analgesic consumption in Taiwan between 2002 and 2014 compare the results with those in other countries to see what we could learn about other methods of pain management. To find out the different patterns between Taiwan and other country, improves the quality of pain management...
October 4, 2016: Journal of the Formosan Medical Association, Taiwan Yi Zhi
Yi-Sheng Chao, Antoine Boivin, Isabelle Marcoux, Geneviève Garnon, Nicholas Mays, Pascale Lehoux, Marie-Claude Prémont, Evert van Leeuwen, Raynald Pineault
BACKGROUND: End-of-life policies are hotly debated in many countries, with international evidence frequently used to support or oppose legal reforms. Existing reviews are limited by their focus on specific practices or selected jurisdictions. The objective is to review international time trends in end-of-life practices. METHODS: We conducted a systematic review of empirical studies on medical end-of-life practices, including treatment withdrawal, the use of drugs for symptom management, and the intentional use of lethal drugs...
October 3, 2016: BMC Health Services Research
Edmund Ndudi Ossai, Kenechi Anderson Uwakwe, Uchenna Chidi Anyanwagu, Ntat Charles Ibiok, Benedict Ndubueze Azuogu, Ngozi Ekeke
BACKGROUND: In resource-poor settings with low doctor-population ratio, there is need for equitable distribution of healthcare workforce. The specialty preferences of medical students determine the future composition of physician workforce hence its relevance in career guidance, healthcare planning and policy formulation. This study was aimed at determining the specialty preferences of final year medical students in medical schools of southeast Nigeria, the gender differences in choice of specialty and the availability of career guidance to the students during the period of training...
October 4, 2016: BMC Medical Education
Zoë M McLaren, Amanda A Milliken, Amanda J Meyer, Alana R Sharp
BACKGROUND: Tuberculosis (TB) now ranks alongside HIV as the leading infectious disease cause of death worldwide and incurs a global economic burden of over $12 billion annually. Directly observed therapy (DOT) recommends that TB patients complete the course of treatment under direct observation of a treatment supporter who is trained and overseen by health services to ensure that patients take their drugs as scheduled. Though the current WHO End TB Strategy does not mention DOT, only "supportive treatment supervision by treatment partners", many TB programs still use it despite the fact that the has not been demonstrated to be statistically significantly superior to self-administered treatment in ensuring treatment success or cure...
October 4, 2016: BMC Infectious Diseases
M L Ou, G Liu, D Xiao, B H Zhang, C C Guo, X G Ye, Y Liu, N Zhang, M Wang, Y J Han, X H Ye, C X Jing, G Yang
miR-137, a brain-enriched microRNA, is involved in the control of neuronal proliferation, differentiation, and dendritic arborization, all of which are important for proper neurogenesis and relevant to schizophrenia. miR-137 is also known to regulate many genes implicated in schizophrenia risk. Although reports have associated the miR-137 polymorphism rs1625579 with this disease, their results have been inconsistent. The aim of this meta-analysis was to evaluate the relationship between rs1625579 and schizophrenia...
September 16, 2016: Genetics and Molecular Research: GMR
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