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HEALTH AND SAFETY (538 journals)                  1 2 3 | Last

Showing 1 - 200 of 203 Journals sorted alphabetically
16 de Abril     Open Access  
A Life in the Day     Hybrid Journal   (Followers: 10)
Acta Informatica Medica     Open Access   (Followers: 1)
Acta Scientiarum. Health Sciences     Open Access  
Adultspan Journal     Hybrid Journal  
Advances in Child Development and Behavior     Full-text available via subscription   (Followers: 11)
Advances in Public Health     Open Access   (Followers: 23)
African Health Sciences     Open Access   (Followers: 2)
African Journal for Physical, Health Education, Recreation and Dance     Full-text available via subscription   (Followers: 6)
African Journal of Health Professions Education     Open Access   (Followers: 6)
Afrimedic Journal     Open Access   (Followers: 2)
Ageing & Society     Hybrid Journal   (Followers: 37)
Air Quality, Atmosphere & Health     Hybrid Journal   (Followers: 4)
AJOB Primary Research     Partially Free   (Followers: 3)
American Journal of Family Therapy     Hybrid Journal   (Followers: 11)
American Journal of Health Economics     Full-text available via subscription   (Followers: 13)
American Journal of Health Education     Hybrid Journal   (Followers: 32)
American Journal of Health Promotion     Hybrid Journal   (Followers: 24)
American Journal of Health Sciences     Open Access   (Followers: 6)
American Journal of Health Studies     Full-text available via subscription   (Followers: 11)
American Journal of Preventive Medicine     Hybrid Journal   (Followers: 26)
American Journal of Public Health     Full-text available via subscription   (Followers: 229)
American Journal of Public Health Research     Open Access   (Followers: 29)
American Medical Writers Association Journal     Full-text available via subscription   (Followers: 2)
Analytic Methods in Accident Research     Hybrid Journal   (Followers: 4)
Annals of Global Health     Open Access   (Followers: 9)
Annals of Health Law     Open Access   (Followers: 3)
Annals of Tropical Medicine and Public Health     Open Access   (Followers: 15)
Applied Biosafety     Hybrid Journal  
Applied Research In Health And Social Sciences : Interface And Interaction     Open Access   (Followers: 2)
Archive of Community Health     Open Access  
Archives of Medicine and Health Sciences     Open Access   (Followers: 3)
Arquivos de Ciências da Saúde     Open Access  
Asia Pacific Journal of Counselling and Psychotherapy     Hybrid Journal   (Followers: 8)
Asia Pacific Journal of Health Management     Full-text available via subscription   (Followers: 3)
Asia-Pacific Journal of Public Health     Hybrid Journal   (Followers: 8)
Asian Journal of Gambling Issues and Public Health     Open Access   (Followers: 3)
Association of Schools of Allied Health Professions     Full-text available via subscription   (Followers: 6)
Atención Primaria     Open Access   (Followers: 1)
Australasian Journal of Paramedicine     Open Access   (Followers: 3)
Australian Advanced Aesthetics     Full-text available via subscription   (Followers: 4)
Australian Family Physician     Full-text available via subscription   (Followers: 3)
Australian Indigenous HealthBulletin     Free   (Followers: 6)
Autism & Developmental Language Impairments     Open Access   (Followers: 6)
Behavioral Healthcare     Full-text available via subscription   (Followers: 6)
Best Practices in Mental Health     Full-text available via subscription   (Followers: 9)
Bijzijn     Hybrid Journal   (Followers: 2)
Bijzijn XL     Hybrid Journal   (Followers: 1)
Biomedical Safety & Standards     Full-text available via subscription   (Followers: 8)
BLDE University Journal of Health Sciences     Open Access  
BMC Oral Health     Open Access   (Followers: 5)
BMC Pregnancy and Childbirth     Open Access   (Followers: 20)
BMJ Simulation & Technology Enhanced Learning     Full-text available via subscription   (Followers: 8)
Brazilian Journal of Medicine and Human Health     Open Access  
Buletin Penelitian Kesehatan     Open Access   (Followers: 2)
Buletin Penelitian Sistem Kesehatan     Open Access  
Bulletin of the World Health Organization     Open Access   (Followers: 17)
Cadernos de Educação, Saúde e Fisioterapia     Open Access   (Followers: 1)
Cadernos Saúde Coletiva     Open Access   (Followers: 1)
Cambridge Quarterly of Healthcare Ethics     Hybrid Journal   (Followers: 11)
Canadian Family Physician     Partially Free   (Followers: 13)
Canadian Journal of Community Mental Health     Full-text available via subscription   (Followers: 12)
Canadian Journal of Human Sexuality     Hybrid Journal   (Followers: 1)
Canadian Journal of Public Health     Full-text available via subscription   (Followers: 20)
Case Reports in Women's Health     Open Access   (Followers: 3)
Case Studies in Fire Safety     Open Access   (Followers: 15)
Central Asian Journal of Global Health     Open Access   (Followers: 2)
Central European Journal of Public Health     Full-text available via subscription   (Followers: 4)
CES Medicina     Open Access  
Child Abuse Research in South Africa     Full-text available via subscription   (Followers: 1)
Child's Nervous System     Hybrid Journal  
Childhood Obesity and Nutrition     Open Access   (Followers: 10)
Children     Open Access   (Followers: 2)
CHRISMED Journal of Health and Research     Open Access  
Christian Journal for Global Health     Open Access  
Ciência & Saúde Coletiva     Open Access   (Followers: 2)
Ciencia y Cuidado     Open Access   (Followers: 1)
Ciencia, Tecnología y Salud     Open Access  
ClinicoEconomics and Outcomes Research     Open Access   (Followers: 2)
CME     Hybrid Journal   (Followers: 1)
CoDAS     Open Access  
Community Health     Open Access   (Followers: 2)
Conflict and Health     Open Access   (Followers: 8)
Contraception and Reproductive Medicine     Open Access  
Curare     Open Access  
Current Opinion in Behavioral Sciences     Hybrid Journal   (Followers: 3)
Day Surgery Australia     Full-text available via subscription   (Followers: 2)
Digital Health     Open Access   (Followers: 3)
Disaster Medicine and Public Health Preparedness     Hybrid Journal   (Followers: 12)
Dramatherapy     Hybrid Journal   (Followers: 2)
Drogues, santé et société     Full-text available via subscription  
Duazary     Open Access   (Followers: 1)
Early Childhood Research Quarterly     Hybrid Journal   (Followers: 17)
East African Journal of Public Health     Full-text available via subscription   (Followers: 3)
Eating and Weight Disorders - Studies on Anorexia, Bulimia and Obesity     Hybrid Journal   (Followers: 19)
EcoHealth     Hybrid Journal   (Followers: 4)
Education for Health     Open Access   (Followers: 5)
electronic Journal of Health Informatics     Open Access   (Followers: 6)
ElectronicHealthcare     Full-text available via subscription   (Followers: 4)
Elsevier Ergonomics Book Series     Full-text available via subscription   (Followers: 5)
Emergency Services SA     Full-text available via subscription   (Followers: 2)
Ensaios e Ciência: Ciências Biológicas, Agrárias e da Saúde     Open Access  
Environmental Disease     Open Access   (Followers: 2)
Environmental Sciences Europe     Open Access   (Followers: 2)
Epidemics     Open Access   (Followers: 4)
Epidemiologic Perspectives & Innovations     Open Access   (Followers: 5)
Epidemiology, Biostatistics and Public Health     Open Access   (Followers: 19)
Ethics, Medicine and Public Health     Full-text available via subscription   (Followers: 3)
Ethiopian Journal of Health Development     Open Access   (Followers: 8)
Ethiopian Journal of Health Sciences     Open Access   (Followers: 7)
Ethnicity & Health     Hybrid Journal   (Followers: 13)
European Journal of Investigation in Health, Psychology and Education     Open Access   (Followers: 2)
European Medical, Health and Pharmaceutical Journal     Open Access  
Evaluation & the Health Professions     Hybrid Journal   (Followers: 10)
Evidence-based Medicine & Public Health     Open Access   (Followers: 6)
Evidência - Ciência e Biotecnologia - Interdisciplinar     Open Access  
Expressa Extensão     Open Access  
Face à face     Open Access   (Followers: 1)
Families, Systems, & Health     Full-text available via subscription   (Followers: 8)
Family & Community Health     Partially Free   (Followers: 12)
Family Medicine and Community Health     Open Access   (Followers: 6)
Family Relations     Partially Free   (Followers: 11)
Fatigue : Biomedicine, Health & Behavior     Hybrid Journal   (Followers: 2)
Food and Public Health     Open Access   (Followers: 11)
Frontiers in Public Health     Open Access   (Followers: 7)
Gaceta Sanitaria     Open Access   (Followers: 3)
Galen Medical Journal     Open Access  
Geospatial Health     Open Access  
Gesundheitsökonomie & Qualitätsmanagement     Hybrid Journal   (Followers: 9)
Giornale Italiano di Health Technology Assessment     Full-text available via subscription  
Global Health : Science and Practice     Open Access   (Followers: 5)
Global Health Promotion     Hybrid Journal   (Followers: 16)
Global Journal of Health Science     Open Access   (Followers: 9)
Global Journal of Public Health     Open Access   (Followers: 12)
Global Medical & Health Communication     Open Access   (Followers: 1)
Global Mental Health     Open Access   (Followers: 5)
Global Security : Health, Science and Policy     Open Access  
Globalization and Health     Open Access   (Followers: 5)
Hacia la Promoción de la Salud     Open Access  
Hastings Center Report     Hybrid Journal   (Followers: 3)
HEADline     Hybrid Journal  
Health & Place     Hybrid Journal   (Followers: 16)
Health & Justice     Open Access   (Followers: 5)
Health : An Interdisciplinary Journal for the Social Study of Health, Illness and Medicine     Hybrid Journal   (Followers: 7)
Health and Human Rights     Free   (Followers: 9)
Health and Social Care Chaplaincy     Hybrid Journal   (Followers: 7)
Health and Social Work     Hybrid Journal   (Followers: 55)
Health Behavior and Policy Review     Full-text available via subscription   (Followers: 2)
Health Care Analysis     Hybrid Journal   (Followers: 14)
Health Inform     Full-text available via subscription  
Health Information Management Journal     Hybrid Journal   (Followers: 16)
Health Issues     Full-text available via subscription   (Followers: 2)
Health Notions     Open Access  
Health Policy     Hybrid Journal   (Followers: 41)
Health Policy and Technology     Hybrid Journal   (Followers: 3)
Health Professional Student Journal     Open Access   (Followers: 2)
Health Promotion International     Hybrid Journal   (Followers: 22)
Health Promotion Journal of Australia : Official Journal of Australian Association of Health Promotion Professionals     Full-text available via subscription   (Followers: 10)
Health Promotion Practice     Hybrid Journal   (Followers: 16)
Health Prospect     Open Access   (Followers: 1)
Health Psychology     Full-text available via subscription   (Followers: 50)
Health Psychology Research     Open Access   (Followers: 19)
Health Psychology Review     Hybrid Journal   (Followers: 42)
Health Renaissance     Open Access  
Health Research Policy and Systems     Open Access   (Followers: 12)
Health SA Gesondheid     Open Access   (Followers: 2)
Health Science Reports     Open Access  
Health Sciences and Disease     Open Access   (Followers: 2)
Health Services Insights     Open Access   (Followers: 2)
Health Systems     Hybrid Journal   (Followers: 3)
Health Voices     Full-text available via subscription  
Health, Culture and Society     Open Access   (Followers: 13)
Health, Risk & Society     Hybrid Journal   (Followers: 11)
Healthcare     Open Access   (Followers: 2)
Healthcare in Low-resource Settings     Open Access   (Followers: 1)
Healthcare Quarterly     Full-text available via subscription   (Followers: 9)
Healthy-Mu Journal     Open Access  
HERD : Health Environments Research & Design Journal     Full-text available via subscription  
Highland Medical Research Journal     Full-text available via subscription  
Hispanic Health Care International     Full-text available via subscription  
HIV & AIDS Review     Full-text available via subscription   (Followers: 11)
Home Health Care Services Quarterly     Hybrid Journal   (Followers: 6)
Hong Kong Journal of Social Work, The     Hybrid Journal   (Followers: 2)
Hospitals & Health Networks     Free   (Followers: 4)
IEEE Journal of Translational Engineering in Health and Medicine     Open Access   (Followers: 3)
IMTU Medical Journal     Full-text available via subscription  
Indian Journal of Health Sciences     Open Access   (Followers: 2)
Indonesian Journal for Health Sciences     Open Access   (Followers: 1)
Inmanencia. Revista del Hospital Interzonal General de Agudos (HIGA) Eva Perón     Open Access  
Innovative Journal of Medical and Health Sciences     Open Access  
Institute for Security Studies Papers     Full-text available via subscription   (Followers: 5)
interactive Journal of Medical Research     Open Access  
International Health     Hybrid Journal   (Followers: 5)
International Journal for Equity in Health     Open Access   (Followers: 7)
International Journal for Quality in Health Care     Hybrid Journal   (Followers: 35)
International Journal of Applied Behavioral Sciences     Open Access   (Followers: 2)
International Journal of Behavioural and Healthcare Research     Hybrid Journal   (Followers: 8)
International Journal of Circumpolar Health     Open Access   (Followers: 1)
International Journal of Community Medicine and Public Health     Open Access   (Followers: 5)
International Journal of E-Health and Medical Communications     Full-text available via subscription   (Followers: 2)

        1 2 3 | Last

Journal Cover Epidemiology, Biostatistics and Public Health
  [SJR: 0.218]   [H-I: 8]   [19 followers]  Follow
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2282-0930 - ISSN (Online) 2282-0930
   Published by Prex S.p.A Homepage  [2 journals]
  • The health in Italy: inequalities and factor risks

    • Authors: Alessandro Solipaca, Walter Ricciardi
      PubDate: 2017-09-21
      DOI: 10.2427/12684
      Issue No: Vol. 14, No. 3 (2017)
  • Socio-economic Inequality in Mortality in Italy

    • Authors: Gianfranco Alicandro, Luisa Frova, Gabriella Sebastiani, Carlo La Vecchia
      PubDate: 2017-09-21
      DOI: 10.2427/12669
      Issue No: Vol. 14, No. 3 (2017)
  • Conflicting gender-related differences in the natural history of patients
           with Idiopathic Dilated Cardiomyopathy.

    • Authors: Laura Vitali Serdoz, Cristina Lutman, Elena Cadamuro, Giulia Barbati, Massimo Zecchin, Marco Merlo, Ilaria Puggia, Bruno Pinamonti, Andrea Di Lenarda, Gianfranco Sinagra
      Abstract: Objective. To evaluated possible clinical and instrumental, natural history and prognostic divergences in women and men with idiopathic dilated cardiomyopathy (IDCM).Patients and Methods. From 1988 to 2012, we evaluated 803 consecutive patients with IDCM recorded in the Heart Muscle Disease Registry of Trieste (Italy). All patients had serial follow-up evaluations at 6, 12, and 24 months, and subsequently every two years, or more frequently if clinically indicated.Results. Two hundred and twenty-seven patients (28%) were female. At first evaluation women were significantly older (48 vs. 45 years old, p = 0.008); presented more frequently left bundle branch block at ECG (38% vs. 28%, p = 0.01), smaller left ventricular end-diastolic indexed volume at echocardiography (85 vs. 93 ml/m2, p <0.002) and more frequently moderate to severe mitral regurgitation at Doppler (43% vs. 33%, p = 0.015). No differences in NYHA class, medical treatment and device implantation rates were found. During a median of 108 months follow-up, women showed a significantly lower ten-year total mortality/heart transplantation (20% vs. 32% respectively, p = 0.001) and cardiovascular mortality rates (9% vs. 15%, p = 0.024) despite a less marked clinical and echocardiographic improvement.Conclusions. In our population of patients with IDCM, women showed a better long-term prognosis notwithstanding a presentation with a more advanced disease and a lower clinical-instrumental improvement on optimal medical therapy compared to men. 
      PubDate: 2017-09-21
      DOI: 10.2427/12527
      Issue No: Vol. 14, No. 3 (2017)
  • Cardiovascular mortality in Northern Ireland during the 2008-2014
           financial crisis years: who got the worst hit'

    • Authors: Mugtaba Osman, Assim Osman
      Abstract: Background: Internationally, cardiovascular mortality and economic recessions showed an established relationship. Northern Ireland was badly affected by the global financial crisis in 2008-2014 but little is known in terms of how cardiovascular mortality was affected.Objective: The aim of the present study was to investigate the potential impact of the 2008 economic crisis on the annual cerebrovascular accidents CVA and ischaemic heart disease IHD related mortality in Northern Ireland.Method: Mortality data were extracted from Northern Ireland Statistics and Research Agency database. We utilized generalized linear regression Poisson modelling to estimate the impact of economic crisis on the IHD and CVA mortality.Results: We found a significant increase of IHD-deaths during the financial crisis years in males over the age of 65 (β = 49.466, p value = 0.003) and females over the age of 65 (β = 57.721, p value = 0.001). However, CVA-mortality in the post crisis years rose significantly for females who were 65 years or older (β = 56.010, p value = 0.005) but not for males. The rest of the age groups were not significantly affected in terms of either CVA or IHD mortality.Conclusion: For the total population the only age category with significant increase in both IHD and CVA mortality in the post-2008 era was the over 65 (p values < 0.001 and = 0.012, respectively)Declaration of interest: None.Keywords: IHD, CVA, Northern Ireland, economic recession, working-age, socio-economic changes
      PubDate: 2017-09-21
      DOI: 10.2427/12598
      Issue No: Vol. 14, No. 3 (2017)
  • Classical causation research practices and sufficient-component cause
           model – Appraisal and pitfalls

    • Authors: Abdul Hakeem Hamood AlRawahi
      Abstract: The sufficient-component cause model is one of the most discussed recent theories in disease causation. Despite some limitations, it seems one of the best theories to explain real world phenomena. It seems that this model has many implications on the current classical research methods related to disease causation. However, these implications have not been sufficiently explored. Therefore, based on the sufficient-component cause model, this paper aims to review, identify and rectify pitfalls in the classical causation research practices, especially those related to cohort study design.
      PubDate: 2017-09-21
      DOI: 10.2427/12576
      Issue No: Vol. 14, No. 3 (2017)
  • European survey on knowledge and attitudes of public health professionals
           on public health genomics: Pilot Study

    • Authors: Annalisa Rosso, Elvira D'Andrea, Marco Di Marco, Erica Pitini, Brigid Unim, Corrado De Vito, Carolina Marzuillo, Paolo Villari
      Abstract: EUROPEAN SURVEY ON KNOWLEDGE AND ATTITUDES OF PUBLIC HEALTH PROFESSIONALS ON PUBLIC HEALTH GENOMICS: PILOT STUDYBackground: During the past decade a debate has arisen on the possible utility of genomic science for public health purposes. Within this context, a survey is being conducted to assess attitudes of European public health (PH) professionals belonging to EUPHA network regarding their role in the implementation of public health genomics (PHG), and their knowledge and attitudes regarding genetic testing and the delivery of genetic services.Methods: A pilot on-line survey was conducted on professionals from Sapienza University of Rome and the Vrije University of Amsterdam. The survey tool is composed of 5 sections: Personal details, Professional activity, Knowledge on genetic testing and delivery of genetic services, Attitudes on genetic testing and delivery of genetic services, Attitudes on the role of PH professionals in PHG.Results: 34 people responded to the questionnaire, mostly medical doctors (61,8%). No respondents correctly identified all evidence-based applications of genetic testing. More than one third of respondents agreed that it would be more important to invest resources in the social and environmental causes of ill health than in genetic testing. Nearly 70% thought that PHG needs to be grounded on evidence of effectiveness, a lower rate agreed ii should be grounded on cost-effectiveness. The rate of agreement with the proposed roles of PH professionals in PHG was very high.Conclusions: This pilot study showed a positive attitude but the need to improve knowledge of PH professionals on PHG. It provided useful input for the implementation of the survey to all members of the EUPHA network.
      PubDate: 2017-09-21
      DOI: 10.2427/12531
      Issue No: Vol. 14, No. 3 (2017)
  • Food safety and health: a survey of rural and urban household consumer
           practices, knowledge to food safety and food related illnesses in Ogun

    • Authors: Oluwawemimo Adebowale, Ibrahim O Kassim
      Abstract:  Background: Consumers’ knowledge on food safety and related practices play central role in reducing foodborne diseases, which represents significant concerns to public health. Objectives: To evaluate rural and urban household consumers knowledge of food safety and related practices in Ogun state, Nigeria. Also, awareness of foodborne illnesses, and  association between respondents’ demographic characteristics and food safety knowledge were investigated.Methods: A crossectional study, which involved a questionnaire based interview of a group of 120 volunteers from four different local government areas (LGA) in Ogun State was conducted. Pearson chi-square analysis was used to test the association between consumers’ demographic parameters and knowledge of food safety.Results: Overall,  eighteen (15.8%, 95% Cl, 10.0 – 23.7) male, and ninety-six (82.2%, 95% Cl, 76.3 – 89.9) female within the age range 16 – 60 years took part in the study. Our data showed that there was poor knowledge regarding food safety practices and food borne illnesses among rural and urban consumers surveyed. However, there was a significant difference in the awareness of rural and urban household consumers to foodborne illnesses and associated complications, (p <0.05). Also, Respondents’ marital status were significantly associated with knowledge of food safety (p <0.000).Conclusion: Poor consumer knowledge of food safety, and food related illnesses  were reported, informing the urgent need to improve on  food safety education such as food handling, preparation, storage and general hygiene practices in homes in Nigeria.
      PubDate: 2017-09-21
      DOI: 10.2427/12568
      Issue No: Vol. 14, No. 3 (2017)
  • Joinpoint regression analysis with time-on-study as time-scale.
           Application to three Italian population-based cohort studies

    • Authors: Federico Rea, Eleonora Pagan, Matteo Monzio Compagnoni, Anna Cantarutti, Pietro Pugni, Vincenzo Bagnardi, Giovanni Corrao
      Abstract: Background: Joinpoint regression analysis is usually applied to study varying trends over time in order to identify the time point(s) in which the trend significantly changes. We illustrate three epidemiological investigations in which this methodology was applied with time-on-study as time-scale.Methods: Data were retrieved from the healthcare utilization databases of Lombardy Region (Italy). We investigated the trend of the: (1) mortality rate among centenarians hospitalized for hip fracture (2004-2011); (2) proportion of persistent patients after the initial prescription of antihypertensive drugs during the first year of treatment according to gender (2005); prescription rate of statins in the year before and after the hospital admission among patients hospitalized for a transient ischemic attack (2008-2009).Results: The following results were obtained: (1) a joinpoint was identified in the fourth month, showing an increased risk of death during the three months after hip fracture hospitalization; (2) the proportion of patients still under antihypertensive treatment falls until the fifth month, remaining stable afterwards; there was evidence that the prevalence of patients who discontinued the treatment was significantly higher among women than men; (3) during the year after the transient ischemic attack episode, monthly rate of available statins was double than the previous year with a significant decrease in the first four months.Conclusions: The joinpoint regression analysis can be a useful tool in epidemiologic framework when a temporal trend is the objective of the investigation since it allows to make inference by means of a quantitative method rather than a qualitative evaluation.
      PubDate: 2017-09-21
      DOI: 10.2427/12616
      Issue No: Vol. 14, No. 3 (2017)
  • Should we use logistic mixed model analysis for the effect estimation in a
           longitudinal RCT with a dichotomous outcome variable'

    • Authors: Jos Twisk, Wieke de Vente, Adri Apeldoorn, Michiel de Boer
      Abstract: Background: Within epidemiology both mixed model analysis and Generalised Estimating Equations (GEE analysis) are frequently used to analyse longitudinal RCT data. With a continuous outcome, both methods lead to more or less the same results, but with a dichotomous outcome the results are totally different. The purpose of the present study is to evaluate the performance of a logistic mixed model analysis and a logistic GEE analysis and to give an advice which of the two methods should be used. Methods: Two real life RCT datasets with and without missing data were used to perform this evaluation. Regarding the logistic mixed model analysis also two different estimation procedures were compared to each other.Results: The regression coefficients obtained from the two logistic mixed model analyses were different from each other, but were always higher then the regression coefficients derived from a logistic GEE analysis. Because this also holds for the standard errors, the corresponding p-values were more or less the same. It was further shown that the effect estimates derived from a logistic mixed model analysis were an overestimation of the ‘real’ effect estimates.Conclusions:  Although logistic mixed model analysis is widely used for the analysis of longitudinal RCT data, this article shows that logistic mixed model analysis should not be used when one is interested in the magnitude of the regression coefficients (i.e. effect estimates). 
      PubDate: 2017-09-21
      DOI: 10.2427/12613
      Issue No: Vol. 14, No. 3 (2017)
  • Determination of Minimum Sample Size Requirement for Multiple Linear
           Regression and Analysis of Covariance Based on Experimental and
           Non-experimental Studies

    • Authors: Mohamad Adam Bujang, Nadiah Sa’at, Tg Mohd Ikhwan Tg Abu Bakar Sidik
      Abstract: Background: MLR and ANCOVA are common statistical techniques and are used for both experimental and non-experimental studies. However, both types of study designs may require different basis of sample size requirement. Therefore, this study aims to proposed sample size guidelines for MLR and ANCOVA for both experimental and non-experimental studies.Methods: We estimated the minimum sample sizes required for MLR and ANCOVA by using Power and Sample Size software (PASS) based on the pre-specified values of alpha, power and effect size (R2). In addition, we also performed validation of the estimates using a real clinical data to evaluate how close the approximations of selected statistics which were derived from the samples were to the actual parameters in the targeted populations. All the coefficients, effect sizes and r-squared obtained from the sample were then compared with their respective parameters in the population.Results: Small minimum sample sizes required for performing both MLR and ANCOVA when r-squared is used as the effect size. However, the validation results based on an evaluation from a real-life dataset suggest that a minimum sample size of 300 or more is necessary to generate a close approximation of estimates with the parameters in the population.Conclusions: We proposed sample size calculation when r-squared is used as an effect size is more suitable for experimental studies. However, taking a larger sample size such as 300 or more is necessary for clinical survey that is conducted in a non-experimental manner.
      PubDate: 2017-09-21
      DOI: 10.2427/12117
      Issue No: Vol. 14, No. 3 (2017)
  • Poisson mixture distribution analysis for North Carolina SIDS counts using
           information criteria

    • Authors: Tyler Massaro
      Abstract: Mixture distribution analysis provides us with a tool for identifying unlabeled clusters that naturally arise in a data set.  In this paper, we demonstrate how to use the information criteria AIC and BIC to choose the optimal number of clusters for a given set of univariate Poisson data.  We give an empirical comparison between minimum Hellinger distance (MHD) estimation and EM estimation for finding parameters in a mixture of Poisson distributions with artificial data.  In addition, we discuss Bayes error in the context of classification problems with mixture of 2, 3, 4, and 5 Poisson models.  Finally, we provide an example with real data, taken from a study that looked at sudden infant death syndrome (SIDS) count data from 100 North Carolina counties (Symons et al., 1983).  This gives us an opportunity to demonstrate the advantages of the proposed model framework in comparison with the original analysis.

      PubDate: 2017-09-21
      DOI: 10.2427/12550
      Issue No: Vol. 14, No. 3 (2017)
  • Occupational exposures and genetic susceptibility to lung cancer and
           pleural mesothelioma: a systematic review

    • Authors: Sonja Milovanovic, Jovana Stojanovic, Roberta Pastorino, Ivo Iavicoli, Stefania Boccia
      Abstract: BackgroundThe risk of occupationally related lung cancer, as well as pleural mesothelioma, in association with genetic polymorphisms, has been investigated with contradictory results.This systematic review aims to summarize the current knowledge on the relationship between genetic polymorphisms, occupational exposures, and lung cancer and pleural mesothelioma.MethodsWe searched MEDLINE, ISI Web of science, and SCOPUS online databases for all articles published in English language up to September 2016. Studies were considered eligible if they had assessed the association between occupational exposures and lung cancer/pleural mesothelioma in relation to genetic polymorphisms.ResultsSixteen studies were included, of which eleven on lung cancer and six on mesothelioma, of which one was in common. NAT2 slow acetylator genotype confers an increased risk of pleural mesothelioma in subjects exposed to asbestos (OR=2.10; 95% CI=1.10-4.10), especially in combination with the GSTM1 null genotype (OR=3.60; 95% CI=1.30-9.60). GSTT1 null and CYP1A1 Msp1 T6235C (T/C+C/C) genotype carriers exposed to arsenic, uranium, asbestos and other chemical agents have an increased risk of lung cancer respect to not exposed wild type genotypes (OR=1.33; 95% CI=0.67-2.64, OR=2.20; 95% CI=1.11-4.35, respectively).ConclusionGenetic polymorphisms might modulate individual susceptibility to lung cancer and pleural mesothelioma in occupationally exposed subjects.
      PubDate: 2017-09-21
      DOI: 10.2427/12559
      Issue No: Vol. 14, No. 3 (2017)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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