CHANGES TO PROCESSING PROCEDURES
There are three different versions of the Activity Classification data, the nature of the activity, the purpose of the activity and the activity as concorded to the 1992 classification. The purpose and concordance versions of the data were derived from the nature of the activity using other supporting information such as who the activity was done for and whether communication was associated with the activity. There are differences between the data for each of these versions of the activity data. In 2006, there was a change made to the purpose derivation to include additional activity codes in the derivation of care for adults. This has resulted in an increase in the amount of time spent on care of adults according to the purpose derivation. This change is not reflected in data from the concordance derivation as this was kept in line with how the data was derived in 1997.