A crossover study was conducted to investigate whether oat bran cereal helps to lower serum cholesterol levels. Fourteen male individuals with high cholesterol were randomly placed on a diet that included either oat bran or corn flakes; after two weeks, their LDL cholesterol levels were measured. Each individual was then switched to the other diet; after two weeks, the LDL levels were recorded again.
In the data set, each row corresponds to one of the 14 individuals in the trial.
CornFlakes: The individual’s LDL level at the end of his time on the corn flake diet (mmol/l)OatBran: The individual’s LDL level at the end of his time on the oat bran diet (mmol/l)The original data comes from:
Anderson JW, Spencer DB, Hamilton CC, Smith SF, Tietyen J, Bryant CA, and Oeltgen P. (1990). Oat-Bran cereal lowers serum total and LDL cholesterol in hypercholesterolemic men. American Journal of Clinical Nutrition, 52:495-499.
I obtained the data from:
Pagano M and Gauvreau K (2000). Principles of Biostatistics, 2nd edition. Duxbury.