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Table 1 Descriptive characteristics and prevalence of cognitive spectrum disorders for all emergency admissions for people aged ≥ 65 years

From: Epidemiology and outcomes of people with dementia, delirium, and unspecified cognitive impairment in the general hospital: prospective cohort study of 10,014 admissions

  All admissions – received an OPRAA assessment
N = 10,014 (79.0% of all admissions)
All admissions – did not receive an OPRAA assessment
N = 2659 (21.0% of all admissions)
Incident admissions – received an OPRAA assessment
N = 5569 (77.3% of incident admissions)
Incident admissions – did not receive an OPRAA assessment
N = 1632 (22.7% of incident admissions)
Age (mean (95% CI)), years   79.3 (79.2–79.5)   77.0 (77.6–77.3)   79.1 (79.5–79.9)   76.2 (75.9–76.6)
Female 5679 56.7 (55.7–57.7) 1367 51.4 (49.5–53.3) 3121 56.0 (54.7–57.3) 850 52.1 (49.7–54.5)
Admitted from care home 799 8.0 (7.5–8.5) 155 5.8 (5.0–6.8) 382 6.9 (6.3–7.6) 76 4.7 (3.8–5.8)
Length of stay (mean days (95% CI))   16.8 (16.2–17.4)   7.4 (6.5–8.3)   16.5 (15.6–17.4)   6.7 (5.6–7.8)
0–2 days 3141 31.4 (30.5–32.3) 1770 66.6 (64.8–68.4) 1867 33.5 (32.3–34.8) 1145 70.2 (67.9–72.4)
3–5 days 1652 16.5 (15.8–17.2) 285 10.7 (9.6–11.9) 897 16.1 (15.2–17.1) 150 9.2 (7.9–10.7)
6–9 days 1503 15.0 (14.3–15.7) 180 6.8 (5.9–7.8) 797 14.3 (13.4–15.2) 93 5.7 (4.7–6.9)
10+ days 3718 37.1 (36.2–38.1) 424 16.0 (14.7–17.4) 2008 36.1 (34.8–37.4) 244 15.0 (13.3–16.8)
Cognitive spectrum disorder 3854 38.5 (37.5–39.4)   Not assessed 1985 35.6 (34.4–36.9)   Not assessed
Any known dementia 1735 17.3 (16.6–18.1)    833 15.0 (14.1–16.0)   
Known dementia alone (no delirium) 940 9.4 (8.8–10.0)    444 8.0 (7.3–8.7)   
Delirium superimposed on known dementiaa 795 7.9 (7.4–8.5)    389 7.0 (6.3–7.7)   
Any delirium 2463 24.6 (23.8–25.5)    1290 23.2 (22.1–24.3)   
Full syndrome delirium (CAM+) 765 7.6 (7.1–8.2)    398 7.2 (6.6–7.9)   
Clinical history suggestive of delirium only 1698 17.0 (16.2–17.7)    892 16.0 (15.1–17.0)   
Delirium alone (no dementia) 1668 16.7 (16.0–17.4)    901 16.2 (15.2–17.2)   
Unspecified cognitive impairmentb 451 4.5 (4.1–4.9)    251 4.5 (4.0–5.1)   
  1. aThese patients are also included in ‘any known dementia’ and ‘any delirium’
  2. bAMT score < 8, no delirium, no known dementia
  3. CAM Confusion Assessment Method, OPRAA Older Persons Routine Acute Assessment