Table 1.

The response among ELSA-HCAP respondents and informants (eligible and completed interviews)

		ELSA-HCAP respondent			ELSA-HCAP informant
Group	Category	Eligible	Completed interviews		Completed interviews
		n	n	%	n	%
Sex	Male	742	573	77.2	371	–
	Female	942	700	74.3	679	–
Age	<65	–	–	–	375	–
	65–69	376	301	80.1	174	–
	70–74	391	299	76.5	183	–
	75–79	339	259	76.4	154	–
	80–84	328	249	75.9	108	–
	85–89	162	114	70.4	27	–
	90 and over	88	51	57.9	–	–
	Missing	–	–	–	23	–
Cognitive grouping selection	1: Low	282	179	63.5	154	86.0*
	2: Moderate	540	419	77.6	364	86.9*
	3: Normal	862	675	78.3	618	91.5*
		1684	1273	75.6	1050	82.5*

ELSA-HCAP: English Longitudinal Study of Ageing-Harmonised Cognitive Assessment Protocol.

^*Percentage response rates from the completed number of respondents.

1273 represents the total sample of ELSA-HCAP respondents and 1050 represents the total sample of ELSA-HCAP informants.