ABSTRACT
Longitudinal data arise when participants in a study are measured on the same variable on several different occasions. Analysis of such data has become something of a growth industry in statistics, largely because of its increasing importance in clinical trials. Before undertaking the formal modelling of the depression data, it may be useful to consider some informative graphical displays. Longitudinal data arise when participants in a study are measured on the same variable on several different occasions. Analysis of such data has become something of a growth industry in statistics, largely because of its increasing importance in clinical trials. Before undertaking the formal modelling of the depression data, it may be useful to consider some informative graphical displays.
