Table 3 Operationalised criteria for delirium (C) 1, when applied to the Cuban population based study data set, by clinical dementia status
Prevalence (%) in those with clinically diagnosed dementia N = 130 | Prevalence (%) (high education controls) N = 50 | Prevalence (%) (low education controls) N = 95 | |
|---|---|---|---|
C criterion requires that the deficits do not occur exclusively during the course of a delirium | |||
C_1 no onset in the last month, and | 100 | 98 | 100 |
C_2 no sudden onset in 1–3 days, and | 93 | 94 | 93 |
C_3 not changeable over 24 hours, alert at one time, drowsy and confused the next, or | 75 | 85 | 87 |
C_4 no confusion worse towards night or evening | 52 | 70 | 61 |