ABSTRACT
In recent years the importance of evaluating the impact of disease and treatments on health has become clear. However, health cannot be measured directly and, instead, indicators should be used to represent clinical outcomes. Increasingly, rating scales are used to score aspects of disease (e.g. symptoms) or elicit patients’ opinion about aspects of health (e.g. psychological well-being).1 This chapter provides information on dystonia rating scales. It has three aims:
1. To provide an introduction to the use and development of rating scales.
