Volume 1, Issue 1 (2010) | Current Research in Biostatistics

Design Based on Intra-Class Correlation Coefficients

Robert Lew — 2010-06-30

Current Research in Biostatistics, Published online: 30 June 2010; doi:10.3844/amjbsp.2010.1.8

Problem statement: Reliability studies are concerned with the study of "consistency" or "repeatability" of measurements. Often times (but not always) the reliability coefficients are Intra-class Co...

Modeling Heterogeneity in Phase II Clinical Trials

Christopher N. Barnes — 2010-06-30

Current Research in Biostatistics, Published online: 30 June 2010; doi:10.3844/amjbsp.2010.9.16

Problem statement: The common assumption in non-randomized Phase II clinical trials is a homogeneous population with homogeneous response. This assumption is at odds with many trials today; a heteroge...

Measure for No Three-Factor Interaction Model in Three-Way Contingency Tables

Kouji Yamamoto — 2010-06-30

Current Research in Biostatistics, Published online: 30 June 2010; doi:10.3844/amjbsp.2010.17.22

Problem statement: For 2×2×K contingency tables, the measure is considered to represent the degree of departure from a log-linear model of No Three-Factor Interaction (NOTFI). We are interested in c...

Comparisons of Test Statistics for Noninferiority Test for the Difference between Two Independent Binominal Proportions

Youhei Kawasaki — 2010-06-30

Current Research in Biostatistics, Published online: 30 June 2010; doi:10.3844/amjbsp.2010.23.31

Problem statement: Noninferiority tests are frequently used in clinical trials to demonstrate that the response for study drugs is not much worse than the response for reference drugs. Several test st...

Simulation Study for Evaluating a New Three Stages Procedure for Selecting the Right Multivariate Regression Model

Ali Hussein AL-Marshadi — 2010-06-30

Current Research in Biostatistics, Published online: 30 June 2010; doi:10.3844/amjbsp.2010.32.41

Problem statement: This article considers the analysis of multivariate regression experiment that is used frequently in variety of applications research such as psychiatric epidemiologic studies. Our ...

Application of a Statistical Model to Biological Data Analysis: Exclusive Breastfeeding

Naushad Mamode Khan — 2010-06-30

Current Research in Biostatistics, Published online: 30 June 2010; doi:10.3844/amjbsp.2010.42.45

Problem statement: Breastfeeding is of utmost importance in the maternal life of a woman, particularly exclusive breastfeeding. Exclusive breastfeeding during the first 6 months of life supports optim...

Testing the Equality of Growth Curves of Independent Populations with Application on Egypt Case

Hanan Girgis — 2010-06-30

Current Research in Biostatistics, Published online: 30 June 2010; doi:10.3844/amjbsp.2010.46.61

Problem statement: Numerous trials have been conducted to compare the body growth curves and hence growth rates relying on smoothing and modeling different growth curves using different parameter valu...

Measure of Departure from Average Cumulative Symmetry for Square Contingency Tables with Ordered Categories

Kouta Miyazawa — 2010-06-30

Current Research in Biostatistics, Published online: 30 June 2010; doi:10.3844/amjbsp.2010.62.66

Problem statement: For square contingency tables with ordered categories, we are interested in considering a structure of weak symmetry when Bowker's symmetry model does not hold and in measuring th...

Utilization and Modification of Point Sampling and Line Sampling in the Forestry Survey

Difei Zhang — 2010-06-30

Current Research in Biostatistics, Published online: 30 June 2010; doi:10.3844/amjbsp.2010.67.74

Problem statement: In the practice of conventional point sampling and line sampling methods in the forestry survey, we often encounter problems such as boundary and hole problems. These problems cou...