background: selecting the correct statistical test and data mining method depends highly on the measurement scale of data, type of variables, and purpose of the analysis. different measurement scales are studied in details and statistical comparison, modeling, and data mining methods are studied based upon using several medical examples. we have presented two ordinal–variables clustering exampl...

Anthony J. Viera1, Feng-Chang Lin2, Alan L. Hinderliter3, Daichi Shimbo4, Sharina D. Person5, Mark J. Pletcher6, and David R. Jacobs Jr.7 1Department of Family Medicine, University of North Carolina at Chapel Hill 2Department of Biostatistics, University of North Carolina at Chapel Hill 3Department of Medicine, Division of Cardiology, University of North Carolina at Chapel Hill 4Department of M...

3 Mathilde Touvier, Doris SM Chan, Rosa Lau, Dagfinn Aune, Rui Vieira, Darren C Greenwood, 4 Ellen Kampman, Elio Riboli, Serge Hercberg, Teresa Norat 5 Affiliations: 6 1 Department of Epidemiology and Biostatistics, School of public health, Imperial College London, 7 United Kingdom 8 2 Nutritional Epidemiology Unit, UREN (Inserm/Inra/Cnam/Paris13 University), CRNH IdF, Bobigny, 9 France 10 3 Bi...

1. Introduction Biomedical research has clearly evolved at a dramatic rate in the past decade, with improvements in technology leading to a fundamental shift in the way in which data are collected and analyzed. Before this paradigm shift, studies were most commonly designed to be simple and to focus on relationships among a few variables of primary interest. For example, in a clinical trial, pa...

Prognostic factors are essential for patient management and counseling. Most cancer patients receive treatment based on the presence or absence of several risk factors. The most prominent example of this is tumor, node, metastasis staging, but many diseases are moving beyond the simple one-sizefits-all stage classification and using stylized prognostic factors. A notable difficulty in the devel...

Correspondence to: Dr Y H Chan Tel: (65) 6325 7070 Fax: (65) 6324 2700 Email: chanyh@ cteru.com.sg In the 100 series(1-4) the common univariate techniques (summarized in Table I) available for data analyses were discussed. These techniques do not allow us to take into account the effect of other covariates/ confounders (except for partial correlation(4)) in an analysis. In such situations, a Re...

OBJECTIVE To assess the knowledge and attitudes of resident physicians toward biostatistics and research methodology concepts. METHODS We conducted a cross-sectional study between November 2014 and October 2014 at King Abdulaziz University Hospital, Jeddah, Kingdom of Saudi Arabia. A self-administered questionnaire was distributed to all participants. The response rate was 90%. RESULTS One ...