ISD Scotland better information, better decisions, better health

Clinical Crosstabs

Data Quality Assurance

NHS National Services Scotland ISD Scotland & NHS National Services Scotland

Clinical Crosstabs

The following links are for tables showing the accuracy and completeness of recording groups of clinical codes - groups of diagnoses recorded as Main Condition and groups of procedures recorded as Main Operation. A group code is classed as being 'correctly recorded' when assessment shows ANY code from that group should be recorded - in other words the recorded group 'hit the group target'.

Diagnosis Crosstabs

Procedure Crosstabs

Neoplasm Crosstabs

The areas in the tables are colour coded:

 Episodes where a group code was correctly recorded in Main Condition or Main Operation

 Episodes where a group code was recorded as Main Condition or Main Operation and a non-group code should have been recorded instead

 Episodes where a non-group code was recorded in Main Condition or Main Operation and a group code should have been recorded instead

In these tables:

  • Accuracy means the percentage of cases where the Main Condition or Main Operation coded recorded on the SMR01 hit the group target
  • Sensitivity is the number of times the group was correctly recorded as a percentage of the true number of times it should have been recorded
  • Completeness is the net balance of recorded, under-recorded and over-recorded group codes as a proportion of the true number of codes required as Main Condition or Main Operation in the sample

Group accuracy figures are more relevant when selecting cases for more detailed analysis e.g. when using data linkage.

Group completeness figures are useful when counting the number of cases falling into the group at national level. This figure may be of use when producing summary statistics for a group at national level.


© ISD Scotland 2010
Information Services Division,
NHS National Services Scotland,
Gyle Square,
1 South Gyle Crescent,
Edinburgh EH12 9EB,
Tel: 0131 275 7777
nss.csd@nhs.net

About Information Services Division | Contact Us | Accessibility | Complaints
Copyright | Terms and Conditions | Privacy | Site Map | Freedom of Information | Data Protection

ISD is a division of NHS NSS
Working at the very heart of the health service, NSS delivers services critical to frontline patient care and in support of the efficient and effective operation of NHS Scotland. Visit the NSS Website for more information