A computer implemented method of presenting information indicating a quantity of data held in a healthcare data system relating to a patient is disclosed. The method comprises processing healthcare data associated with the patient to select one of a predetermined set of classes associated with the patient and displaying data indicating the selected class associated with the patient. Each class represents a range of numbers of data items associated with a patient. The processing comprises: querying a plurality of database tables in the healthcare data system to identify data items associated with the patient; counting the identified data items to generate a number; and selecting one of the predetermined set of classes by comparing the number with the ranges represented by the set of classes.