Table 1 Description of variables used in the data analysis. Only some of these variables were used in the multivariate models (see table 2)
Variable nameDescription (all applied at CAU level)
Explanatory variables
PCROWDProportion of households which are crowded, based on bedroom deficit of one or more
PCROWDNZ<40Proportion of households which are crowded and contain at least one NZ-born person <40 years
PMIGProportion of population who are migrants born in high-TB-incidence countries
PEURProportion of population with European ethnicity
PMAOProportion of population with Maori ethnicity
PPACProportion of population with Pacific ethnicity
POTHProportion of population with Other ethnicity
INCOMEMedian Income (Jensen Equivalised Annual Household Income)
INCOMENZ<40Median Income (Jensen Equivalised Annual Household Income) for households with at least one NZ-born person <40 years
NZDEPNew Zealand Index of Deprivation 2001 score
P<40Proportion of people <40 years
TB5YRIncident TB cases in total population in previous 5-year period (1995–9)
TBNZ5YRIncident TB cases in NZ-born population in previous 5-year period (1995–9)
TBMIG5YRIncident TB cases in migrant population in previous 5 years (1995–9)
Outcome variables
TBNZ<40Incident TB cases in NZ-born population <40 years, 2000–4
TBNZ⩾40Incident TB cases in NZ-born population ⩾40 years, 2000–4
TBMIGIncident TB cases in migrants born in high-incidence countries, 2000–4
TBTOTIncident TB cases in total population, 2000–4