The delirium and population health informatics cohort study protocol: ascertaining the determinants and outcomes from delirium in a whole population

Table 2 Age structure of DELPHIC in relation to dementia prevalence, hospital presentation rate and sample for proactive contact

Age (years)	Camden	DELPHIC cohort (N)^a		Prevalent dementia N (%)		Incident dementia N (%/year)		Expected mortality (annual)		% Proactive contact	High-risk (N)
70–74	5631	676	34%	18	2.7%	5	0.7	2%	14	5%	33
75–79	4442	533	27%	30	5.7%	9	1.6	3.5%	19	10%	53
80–84	3455	414	21%	41	9.9%	14	3.3	6.5%	27	15%	62
85–89	2048	246	12%	38	16%	12	4.8	15%	37	20%	49
≥90	1095	131	7%	35	27%	6	4.8	15%	20	40%	53
	16,671	2000		162	8.1	46			117	12.5%	250

^aProportions mapped to Camden population estimates (2011 census). Prevalent and incident dementia cases estimated from CFAS-II data. [25, 47]

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