Feasibility, validity and reliability of the ASCOT-Proxy and ASCOT-Carer among unpaid carers of people living with dementia in England

Table 10 Convergent validity of the ASCOT-Proxy-person and ASCOT-Carer

	ASCOT-Proxy-person			ASCOT-Carer
Variables	N	Rs	As hypothesised	N	Rs	As hypothesised
Well-Being & Health
EQ-5D-5L (carer)	n/a	n/a	n/a	312	0.42***	YES
EQ-5D-5L-Proxy-proxy	278	0.38***	YES	n/a	n/a	n/a
EQ-5D-5L-Proxy-person	275	0.41***	YES	n/a	n/a	n/a
C-DEMQOL	n/a	n/a	n/a	303	0.75***	YES
DEMQOL-Proxy-proxy	268	0.44***	Exp: large positive correlation This study: medium positive	n/a	n/a	n/a
Carers quality of life (one item)	n/a	n/a	n/a	311	0.71***	YES
Proxy-proxy quality of life (one item)	276	0.40***	YES	n/a	n/a	n/a
Proxy-person quality of life (one item)	277	0.61***	YES	n/a	n/a	n/a
Carer Experience Scale	n/a	n/a	n/a	308	0.65***	YES
ASCOT-Proxy-proxy	n/a	n/a	n/a	283	0.10	Exp: small positive correlation This study: small positive correlation, ns
ASCOT-Proxy-person	n/a	n/a	n/a	277	0.18*	YES
Satisfaction with social care services	n/a	n/a	n/a	308	0.40***	YES
Sociodemographic
(I/ADLS): proxy-proxy^a	276	-0.30***	Exp: small negative correlation This study: medium negative	n/a	n/a	n/a

We used the correlation coefficient as a measure of the size of the effect. We interpreted values of ± 0.1 as a small effect, ± 0.3 as a medium effect and ± 0.5 as a large effect Bold indicates that the magnitude and direction of the correlation was as hypothesised
Abbreviations: Rs The spearman correlation coefficient, n/a Not used for validation, Exp Expected, ns Non-significant
^aInstrumental activities of daily living (I/ADLS): total number of eight ADLs with difficulty or unable to complete alone (higher the score, the more ADLs with difficulty: getting around (except steps) indoors; getting in and out of bed; eating; paperwork or finances; having a bath or shower; dressing or undressing; using the toilet; washing hands and face)
^*< 0.05; ^**< 0.01; ^***< 0.001

ISSN: 1477-7525