Of the 258 isolates that underwent plasmid profile analysis, the postcode of residence of the case was identified for 243.
These in turn can be grouped into postcode districts, which can be grouped into postcode areas.
These data were subsequently aggregated at postcode district resolution.
All cases had a valid and complete postcode and could be linked to the enumeration district of residence.
The referring laboratory postcode alone was available for a further 14 and for one isolate no postcode could be identified.
Thus, these small postcode sectors constituted the primary sampling unit.
The linkage was based upon the first letter of the family (maiden) name, gender, date of birth, residence, and postcode of the general practitioner (identifiers).
Linkage was based upon the first letter of the family (maiden) name, gender, date of birth, residence, and postcode of the general practitioner (identifiers).
