G
Gary G. Koch
Researcher at University of North Carolina at Chapel Hill
Publications - 481
Citations - 95650
Gary G. Koch is an academic researcher from University of North Carolina at Chapel Hill. The author has contributed to research in topics: Population & Randomized controlled trial. The author has an hindex of 80, co-authored 469 publications receiving 85864 citations. Previous affiliations of Gary G. Koch include University of Alabama at Birmingham & Duke University.
Papers
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Journal ArticleDOI
The measurement of observer agreement for categorical data
J. R. Landis,Gary G. Koch +1 more
TL;DR: A general statistical methodology for the analysis of multivariate categorical data arising from observer reliability studies is presented and tests for interobserver bias are presented in terms of first-order marginal homogeneity and measures of interob server agreement are developed as generalized kappa-type statistics.
Book
Categorical Data Analysis Using the SAS System
TL;DR: The preface to the Second Edition Acknowledgments describes the background work, methodology, and results that were published in the first edition of this book, which focused on logistic Regression.
Journal ArticleDOI
Secondary Sexual Characteristics and Menses in Young Girls Seen in Office Practice: A Study from the Pediatric Research in Office Settings Network
Marcia E. Herman-Giddens,Eric J. Slora,Richard C. Wasserman,Richard C. Wasserman,Carlos J. Bourdony,Manju V. Bhapkar,Gary G. Koch,Cynthia M. Hasemeier +7 more
TL;DR: Data suggest that girls seen in a sample of pediatric practices from across the United States are developing pubertal characteristics at younger ages than currently used norms, and practitioners may need to revise their criteria for referral of girls with precocious puberty.
Journal ArticleDOI
Assessment of risk for periodontal disease. I. Risk indicators for attachment loss.
Sara G. Grossi,Joseph J. Zambon,Alex W. Ho,Gary G. Koch,Robert G. Dunford,Eli E. Machtei,Ola M. Norderyd,Robert J. Genco +7 more
TL;DR: Age, smoking, diabetes mellitus, and the presence of subgingival P. gingivalis and B. forsythus are risk indicators for attachment loss, which remain valid after controlling for gender, socioeconomic status, income, education, and oral hygiene status.
Journal ArticleDOI
Lifetime risk of symptomatic knee osteoarthritis
Louise B. Murphy,Todd A. Schwartz,Charles G. Helmick,Jordan B. Renner,Gail Tudor,Gary G. Koch,Anca D. Dragomir,William D. Kalsbeek,Gheorghe Luta,Joanne M. Jordan +9 more
TL;DR: Nearly half of the adults in Johnston County will develop symptomatic knee OA by age 85 years, with lifetime risk highest among obese persons, which underscores the immediate need for greater use of clinical and public health interventions, especially those that address weight loss and self-management.