title: Factorial trials as a method of studying physiotherapy.
abstract: This article discusses the need for research in the field of physiotherapy, and the difficulties involved in carrying out this type of research. It describes a factorial trial, and the advantages of using it in physiotherapy. The appendix is a letter from a statistician, and discusses some of these advantages in more detail.
authors.affiliation: The Associate Study Group.
authors.forename: F K
authors.initials: FK
authors.lastname: Bainbridge