Health care resource utilisation in primary care prior to and after a diagnosis of Alzheimer’s disease: a retrospective, matched case–control study in the United Kingdom

Table 1 Cohort characteristics

	Patients with AD N = 3,896	GOA Controls N = 7,792	P-value
Age, mean years (standard deviation)	79.9 (6.5)	79.9 (6.5)
Age Group, % of patients
65-69	7.3%	7.3%
70-74	13.7%	13.7%
75-79	25.7%	25.7%
80-84	27.7%	27.7%
85+	25.7%	25.7%
Female,% of patients	65.2%	65.2%
Geographic Region, % of patients
England	73.2%	73.2%
Northern Ireland	3.5%	3.5%
Scotland	14.6%	14.6%
Wales	8.7%	8.7%
CCI^a, mean (range)	0.69 (0, 6)	0.69 (0, 6)
CCI ≥ 1, % of patients	36.2%	36.2%
Hypertension, % of patients	9.3%	10.5%	.0351
Depression, % of patients	16.5%	9.2%	<.0001
Psychosis, % of patients	0.31%	0.04%	.0013

AD = Alzheimer’s disease; GOA = general older adult; CCI = Charlson Comorbidity Index.
^aCCI was calculated excluding dementia component.

ISSN: 1471-2318