Datum Newsletter

Datum is the Biostatistics newsletter Key Function of the Clinical and Translational Science Institute (CTSI). Open an issue of Datum and you will find in-depth descriptions of featured databases, statistical articles, examples of our collaborative work, illustrations of statistical methods you can use in your research or in understanding the literature, information about useful websites...and more!

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All issues of Datum are available through this archive. Issues are posted as portable document format, or PDF, files. To read these files, you will need to have Adobe Acrobat Reader installed on your computer.

Datum Volume XXI - 2015

Vol 21 No.3 Sept/Oct

Vol 21 No.2 April/May 

Vol 21 No.1 Feb/March


Datum Volume XX - 2014

Vol 20 No.3 Sept/Oct 

Vol 20 No.2 April/May 

Vol 20 No.1 Feb/March 


Datum Volume XIX - 2013

Vol 19 No.4 Nov/Dec (PDF)

  • ROC Curves and the C statistic, By: Brent Logan, PhD 
  • Longitudinal Studies: Design and Analysis Considerations, By: Jennifer Le-rademacher, PhD 

Vol 19 No.3 Sept/Oct (PDF)

  • Estimation of Genetic Variance Components, By: Tao Wang, PhD 

Vol 19 No.2 April/May (PDF)

  • Regression Splines, By: Aniko Szabo, PhD 
  • Poisson Regression, By: Kwang Woo Ahn, PhD 

Vol 19 No.1 Feb/Mar (PDF)

  • Comparing Treatment Effect Using Adjusted Survival Curves, By: Mei-Jie Zhang, PhD 
  • Automatic Regression Model Selection Procedures, By: Jessica Pruszynski, PhD 


Datum Volume XVIII - 2012

Vol 18 No.5 Nov/Dec (PDF)

  • Comparing Survival Curves vs. Comparing Survival Probabilities at a Fixed Time Point, By: Jennifer Le-Rademacher, PhD 
  • Interpreting Tables, By: Ruta Brazauskas, PhD 

Vol 18 No.4 Sept/Oct (PDF)

  • Simple Statistics for Reliability and Agreement, By: Dan Eastwood, MS 
  • Validating a Measurement Instrument, By: Brent Logan, PhD 

Vol 18 No.3 May/June (PDF)

  • What Can Go Wrong with Sample Size Calculations for the Two Sample T-Test?, By: Sergey Tarima, PhD 
  • On Coding Genotypes for Genetic Markers, By: Tao Wang, PhD 

Vol 18 No.1 Jan/Feb (PDF)

  • Cumulative Incidence Functions, By: Ruta Brazauskas, PhD 
  • Panel Charts in Excel, By: Aniko Szabo, PhD 


Datum Volume XVII - 2011

Vol 17 No.4 Nov/Dec (PDF)

  • Correlation Coefficients, By: Kwang Woo Ahn, PhD 
  • Non-Parametric Tests for Paired Data, By: Jennifer Le-Rademacher, PhD 

Vol 17 No.3 Sept/Oct (PDF)

  • Matched Pairs Study Design, By: John Klein, PhD 
  • Descriptive Statistics, By: Jessica Pruszynski, PhD 

Vol 17 No.2 July/Aug (PDF)

  • Displaying Data Graphically, By: Alexis Vistocky, MS 
  • Effect of Cell Dose on Relapse and Survival in Identical Twin Bone Marrow Transplant for Leukemia: Analyzing Time to Event Data with Time-Varying Treatment Effect, By: Mei-Jie Zhang, PhD 

Vol 17 No.1 Jan/Feb (PDF)

  • A Comparison of General Medical Inpatient Models of Care, By:Siddhartha Singh, MD and Sergey Tarima, PhD 
  • Linear Regression Using Microsoft Excel 2007, By: Jennifer Le-Rademacher, PhD 


Datum Volume XVI - 2010

Vol 16 No.3 July/Aug (PDF)

  • The Normal Q-Q Plot, By: Brent Logan, PhD 
  • Measuring Biomechanical Properties of Brain Tissue, By: JiangYue Zhang, PhD 
  • Nationwide Emergency Department Sample, By: Emily McGinley MS, MPH 
  • Histograms, By: Daniel Eastwood, MS 

Vol 16 No.2 May/June (PDF)

  • Survival Curve: Univariate Analysis, By: Ruta Brazauskas, PhD 
  • Using Simple Curves to Understand Late Effects in Lymphoma Patients, By:John Klein, PhD

Vol 16 No.3 Mar/Apr (PDF)

  • Mixed Models for Repeated Measures Data, By: Aniko Szabo, PhD and Carol Everson, PhD 
  • Effects of Recurrent Sleep Restriction and Inadequate Recuperation in Rats, By: Aniko Szabo, PhD 


Datum Volume XV - 2009

Vol 15 No.5 Nov/Dec (PDF)

  • Bayesian Inference, By: Kwang Woo Ahn, PhD 
  • National Survey of Children's Health, By: Emily McGinley, MS, MPH 
  • Haplotype Reconstruction Using PHASE Software, By: Tao Wang, PhD 
  • 2D Strain Echo Predicts Viability Following Myocardial Infarction, By: Kwang Woo Ahn, PhD and Ray Migrino, MD 

Vol 15 No.4 Sept/Oct (PDF)

  • Spaghetti Plots, By: Aniko Szabo, PhD 
  • Multiple Comparisons, By: Brent Logan, PhD 
  • Software Options for Multiple Comparisons, By: Brent Logan, PhD 
  • Effect of Total Hip Arthroplasty on Bone Structure, By: Mei-Jie Zhang, PhD and Scott Jackson, MS 

Vol 15 No.3 July/Aug (PDF)

  • National Nursing Assistant Survey, By: Emily McGinley, MS, MPH 
  • Three-dimensional Charts, By: Aniko Szabo, PhD 
  • Analysis of Variance (ANOVA), By: Sergey Tarima, PhD 
  • Nonparametric Analysis Software, By: Jennifer Le-Rademacher, PhD 
  • Comparing Footprint Area Between Gender and Age Groups, By: Sergey Tarima, PhD and Xue Cheng Liu, PhD 

Vol 15 No.2 May/June (PDF)

  • What Biostatistics cand do for you?, By: Dan Eastwood, MS 
  • Box-and-Whisker Plots, By: Aniko Szabo, PhD 
  • Contribution of Genetic Variants to Pediatric Onset Crohn's Disease, By: Tao Wang, PhD 
  • Logistic Regression, By: Prakash (Purushottam) Laud, PhD 

Vol 15 No.1 Mar/Apr (PDF)

  • The United States Census of Agriculture, By: Emily McGinley, MS 
  • Dot Plots, Aniko Szabo, PhD 
  • What Do We Do if Data Come in Pairs?, By: Ruta Bajonuraite, PhD
  • Comparing Hand Placement Techniques in CPR: AN Example of Paired Data Analysis, By: John Klein, PhD 
  • Review of Statistical Software, By: Alexis Dye, MS