A Multivariate Approach to Sample Size Calculations for Thorough QT Studies (2009)
Suraj P. An, Sharon C. Murray, Gary G. Koch
Thorough QT studies are becoming a necessary part of the clinical profile of existing and investigational new drugs. The E14 guidelines mandate performing a thorough QT study on any non antiarrythmic...
Suraj P. An, Sharon C. Murray, Gary G. Koch
The cost involved in running a ‘thorough QT/QTc study ’ is substantial and an adverse outcome of the study can be detrimental to the safety profile of the drug, hence sample size calculations...
Lindsay, Lisa, Jackson, Lisa A., Savitz, David A., Weber, David J., Koch, Gary G., Kong, Lan, ...
This study investigated the relation between weekly levels of influenza activity and the risk of acute influenza-like illness episodes among 8,323 healthy pregnant and postpartum women enrolled in a...
Analyzing Repeated Measures Marginal Models on Sample Surveys with Resampling Methods (2005)
James D. Knoke, Christy M. Anderson, Gary G. Koch
Packaged statistical software for analyzing categorical, repeated measures marginal models on sample survey data with binary covariates does not appear to be available. Consequently, this report...
Davis, Sonia M., Koch, Gary G., Davis, C. E., LaVange, Lisa M.
The design of the Clinical Antipsychotic Trials of Intervention Effectiveness (CATIE) schizophrenia and Alzheimer's disease studies pose several statistical challenges, including issues related to...
Wong, Yueh-ti, Bauman, Karl E., Koch, Gary G.
The relative effectiveness of three common strategies to increase participation in worksite health promotion programs was assessed. The interventions, designed for low income employees, were (1)...
ATYPICAL METAPLASIA AND INCIDENCE OF BRONCHOGENIC CARCINOMA (1990)
VINE, MARILYN F., SCHOENBACH, VICTOR J., HULKA, BARBARA S., KOCH, GARY G., SAMSA, GREGORY
The prognostic implication of atypical squamous metaplasia of the respiratory tract has been uncertain, especially for mild atypia. The relation between degree of severity of atypical metaplasia as...
Bauman, Karl E., Padgett, Connie A., Koch, Gary G.
Theory suggests that mass media will be more effective if they stimulate interpersonal communication, and research suggests that adolescent smoking is related to the attitudes and behavior of their...
BAUMAN, KARL E., KOCH, GARY G., BRYAN, ELIZABETH S, HALEY, NANCY J, DOWNTON, MARIA I., ORLANDI, MARIO A.
This study assessed the validtty of self-reporb of smokeless tobacco use by adolescents and the validity of cotinine as a measure of adolescent cigarette smoking. For a sample of 1,854 persons aged...
Models of Adult Day Care: Findings From a National Survey (1989)
Weissert, William G., Elston, Jennifer M., Bolda, Elise J., Cready, Cynthia M., Zelman, William N., Sloane, Phil D., ...
We examined a nationally representative sample of 60 adult day care centers to describe the state of this evolving care modality after a decade's growth. Results indicate that day care centers can be...
BAUMAN, KARL E., KOCH, GARY G.
Bauman, K. E. (Dept. of Maternal and Child Health, School of Public Health, U. of North Carolina, Chapel Hill, NC 27514) and G. G. Koch. Validity of self-reports and descriptive and analytical...
Landis, J. Richard, Cooper, Murray M., Kennedy, Thomas, Koch, Gary G.
PARCAT is a computer program which implements alternative tests for average partial association in three-way contingency tables within the framework of the product multiple hypergeometric probability...
A computer program for multivariate ratio analysis (MISCAT) (1978)
Stanish, William M., Koch, Gary G., Landis, J. Richard
Analysts must deal frequently with missing data in multivariate analysis. In such cases, estimating the covariance maxtrix V of the dependent variables usually involves initial estimation and...
Stanish, William M., Chi, G. Y. H., Johnson, William D., Koch, Gary G., Landis, J. Richard, Liu-Chi, Shelley
CRISCAT is a computer program for the analysis of grouped survival data with competing risks via weighted least squares methods. Competing risks adjustments are obtained from general matrix...
Landis, J. Richard, Stanish, William M., Freeman, Jean L., Koch, Gary G.
GENCAT is a computer program which implements an extremely general methodology for the analysis of multivariate categorical data. This approach essentially involves the construction of test...
Analyzing Panel Data with Uncontrolled Attrition (1974)
Lehnen, Robert G., Koch, Gary G.
Three-wave panel data collected during the 1968 presidential election campaign in Florida and North Carolina are analyzed on the basis of the partial candidate preference information available for...
Analysis of Qualitative Data: Linear Functions
Johnson, William D., Koch, Gary G.
A procedure is described for fitting linear models to categorical data obtained by stratified random sampling. The method makes it possible to compute estimates of variance and to test certain types...
Howard, Daniel L., Sloane, Philip D., Zimmerman, Sheryl, Eckert, J. Kevin, Walsh, Joan F., Buie, Verita C., ...
Objectives. In this study, we examined racial separation in long-term care.
Analysis of Qualitative Data: Linear Functions
Johnson, William D., Koch, Gary G.
A procedure is described for fitting linear models to categorical data obtained by stratified random sampling. The method makes it possible to compute estimates of variance and to test certain types...
Howard, Daniel L., Sloane, Philip D., Zimmerman, Sheryl, Eckert, J. Kevin, Walsh, Joan F., Buie, Verita C., ...
Objectives. In this study, we examined racial separation in long-term care.
Analyzing Repeated Measures Marginal Models on Sample Surveys with Resampling Methods
James D. Knoke, Christy M. Anderson, Gary G. Koch
Packaged statistical software for analyzing categorical, repeated measures marginal models on sample survey data with binary covariates does not appear to be available. Consequently, this report...