Table 1 Main variables being measured as part of the SHOW Study

Household & neighbourhood exposures

Environment exposures and access to services

• Property location recorded at small area level allows them to be assigned to region and neighbourhood level exposures and distance to facilities and services

Household socio-economic status

• Deprivation rating (NZDep) of neighbourhood

Household crowding level

• Household occupancy and bedroom deficit calculated from information on composition of the household and numbers of bedrooms

Type of tenure and duration of tenancy

• Housing applicant or tenant

•Duration of tenancy

Household income

• Equivalised household income (generally low compared to NZ population)

• Receipt of means-tested Government benefit

Household type

• Composition of family unit e.g. single person, sole parent, parents and children

Passive smoke exposure

• Assigned to tenant households based on self-reported smoking behaviour of adult occupants

Participation in Healthy Housing Programme

• Whether offered programme and acceptance

•Nature of specific interventions(s) and timing

Individual level factors

Age

• Date of birth recorded for all participants

Sex

• Sex recorded for all participants

Ethnicity

• Self-identified ethnicity recorded for all participants

Socioeconomic status

• Not specifically measured for individuals (generally low because of the HNZC housing allocation system)

Established chronic disease and disability

• Not specifically measured for individuals (but has high prevalence because of the HNZC housing allocation system)

Active smoking

• Assigned to individuals based on self-reported smoking behaviour

Linked outcome data

Hospitalisations

• Diagnostic codes, E codes, timing of admissions, outcomes

Deaths

• Cause of death, E codes, timing of deaths

Other outcomes linked to individual NHI

• Pharmaceuticals and other health events linked to individual NHI