A visualization of cross-over data using linear functions.
Stat Med 1999 Apr; 18(8):975-987
Previous work has shown that cross-over trial data can be analyzed using within-subject linear functions. Scores that result from linear functions are graphed in quantile comparison plots in order to visualize the differences between factor levels. An example suggests how this visualization can be used to identify outliers or to provide a more specific interpretation of results. Additional examples indicate how this approach can be used to track carry-over differences or interaction effects. This article is a U.S. Government work and is in the public domain in the United States.
Data-processing; Statistical-analysis; Visual-images; Medical-research; Pulmonary-function-tests; Pharmacology
William E. Miller, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, 1095 Willowdale Rd. Morgantown, WV 26505-2888, USA
Statistics in Medicine