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Table 2 In hospital length of stay, 30-day mortality, and 1-year mortality by cognitive status

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

  In-hospital length of stay Mean days (95% CI) Mortality by 30 days from admission Prevalence (95% CI) Mortality by 1 year from admission Prevalence (95% CI)
All incident admissions (n = 7201) 14.3 (13.6–15.0) 9.9 (9.2–10.6) 29.0 (28.0–30.1)
Did not receive OPRAA assessment (n = 1632) 6.7 (5.6–7.8)b 7.1 (6.0–8.5)c 22.2 (20.3–24.3)d
Received OPRAA assessment (n = 5569) 16.8 (15.6–17.4) 10.7 (9.9–11.5) 31.0 (29.8–32.2)
No cognitive spectrum disorder (n = 3584) 11.8 (11.0–12.6)e 9.0 (8.1–10.0)f 26.0 (24.6–27.5)g
Cognitive spectrum disorder (n = 1985) 25.0 (23.1–26.9) 13.6 (12.2–15.2) 40.0 (37.9–42.2)
Known dementia alone (group 1, n = 444) 20.1 (16.9–23.3)h 12.8 (10.0–16.2)i 43.9 (39.4–48.5)j
Delirium alone (group 2, n = 901) 23.0 (20.3–25.6) 13.6 (11.5–16.0) 36.2 (33.1–39.4)
Delirium superimposed on known dementia (group 3, n = 389) 34.3 (28.5–40.0) 14.7 (11.5–18.5) 43.7 (38.9–48.7)
Unspecified cognitive impairmenta (group 4, n = 251) 26.8 (22.5–31.2) 13.2 (9.5–17.9) 41.0 (35.1–47.2)
  1. aAMT score < 8, no delirium, no known dementia
  2. bDifference = 9.8 (95% CI 8.1–11.6) P < 0.001
  3. cDifference = 3.4 (95% CI 1.8–4.8) P < 0.001
  4. dDifference = 8.8 (95% CI 6.4–11.1) P < 0.001
  5. eDifference = 13.2 (95% CI 11.2–15.3) P <0.001
  6. fDifference = 4.6 (95% CI 2.8–6.4) P <0.001
  7. gDifference = 14.0 (95% CI 11.4–16.6) P < 0.001
  8. hGroup 3 significantly different from group 1 (P < 0.001) and group 2 (P < 0.001), all other pairwise comparisons not significant (P > 0.138)
  9. iPairwise comparisons not significant (P > 0.872)
  10. jGroup 1 significantly different from group 2 (P = 0.032) all other pairwise comparisons not significant (P > 0.054)
  11. OPRAA Older Persons Routine Acute Assessment