Table 2.

Data collection for iSupport RCT

Questionnaire or study-specific questions	Time point	Workstream
Local COVID-19 alert level at date of assessment	T0, T1, T2	1,2,3
Demographic questions	T0	1,2,3
Employment, marital status and living situation questions	T0, T1, T2	1,2,3
12-item Zarit Burden Interview (ZBI-12)48*	T0, T1, T2	1,3
10-item Centre for Epidemiological Studies Depression Scale (CES-D-10)*49	T0, T1, T2	1,3
EQ-5D-5L50	T0, T1, T2	3
Resilience Scale-1451	T0, T1, T2	1
Generalised Anxiety Disorder Questionnaire52	T0, T1, T2	1
Dementia Knowledge Assessment Scale53	T0, T1, T2	1
Adapted Erasumus iMTA informal care questionnaire54	T0, T1, T2	3
Service use questions	T0, T1, T2	3
Quality of the Carer-Patient Relationship55	T0, T1, T2	1
Dementia Quality of Life – Proxy measure56	T0, T1, T2	1,3
Researcher remains blinded to allocation question	T1, T2	1

*Indicates primary outcome measure for WS1.

RCT, randomised controlled trial; WS, workstream.