They contain information on practice codes, Primary Care Trusts (PCTs) codes, GPs age, gender and country of qualification; GP type (i.e. salaried or partner), full-time equivalence (FTE) (including hours if available).
Table 1 presents the cross classification of the three binary coded primary analytic variables.
Primary and secondary associated causes of neonatal deaths were coded; primary cause of death was analyzed.
A database of all cases (Alberta Cancer Registry) codes primary cancers by site, morphology, clinical and demographic information.
We also extracted the primary ICD-9 code, primary CPT code, age, sex, emergency classification, and admission status.
The CMP database codes primary and secondary reasons for admission, according to the specifically designed ICNARC Coding Method [ 14].
However, more work needs to be done to identify valid and reliable measures of normal deliveries, using all diagnostic codes (primary and secondary) as well as procedure codes.
The International Classification of Diseases (ICD) – Oncology, 3rd edition was used to code primary site and morphology (site code C25.0 through C25.9 and all morphologies).
The collection of clinical data (Table 7) shows much variation with the patient's clinically coded primary disease/diagnosis being the only data element common across all centres.
