Table 2 Outcome measures

Primary outcome measure

Number of Moderate and severe exacerbations of COPD

Secondary outcome measures A

Severe exacerbations of COPD for which hospitalisation (ICD-10 code: J44) is required to treat the exacerbation;

Moderate exacerbations of COPD; defined as requiring treatment with systemic corticosteroids and/or antibiotics.

Hospitalisations for key lower respiratory tract illnesses (ICD-10 codes: J40-J47)

All-cause hospitalisation

Temperature in the living and bedrooms

Electricity usage

Costs to health care system

Secondary outcome measures-B

Self-reported quality of life

Respiratory health of other people living in household

Any changes in COPD severity (i.e. change in FEV1)

Study withdrawals due to death or greater dependency

Net benefits (benefits relative to costs) of the intervention.

Support person burden