Table 1.
Study participants and the proportion of zero scores in each NPI item.
| Variables | Nursing home cohortsa |
|
|---|---|---|
| 2004b | 2011b | |
| Demographics | ||
| Sample size | 830 | 1359 |
| Age, M [SD] | 84.5 [7.3] | 85.7 [7.7] |
| Female, % | 74.3 | 71.2 |
| CDR, Mdn [IQR] | 2 [1] | 2 [1] |
| Domain scoresc of items of the Neuropsychiatric Inventory. | ||
| Percentage zeros, (median and [IQR]) if above zero | ||
| Delusions | 63.1, (6 [11]) | 60.6, (6 [7]) |
| Hallucinations | 73.9, (4 [6]) | 77.0, (4 [6]) |
| Agitation | 56.6, (6 [5]) | 56.0, (4 [6]) |
| Depression | 56.9, (4 [6]) | 52.8, (3 [4]) |
| Anxiety | 66.4, (6 [5]) | 63.1, (4 [6]) |
| Euphoria | 90.2, (6 [6]) | 90.5, (4 [4]) |
| Apathy | 59.6, (8 [4]) | 58.8, (6 [5]) |
| Disinhibition | 64.7, (6 [5]) | 57.6, (4 [6]) |
| Irritability | 49.2, (4 [5]) | 44.9, (4 [6]) |
| Motor | 74.9, (8 [6]) | 71.7, (8 [8]) |
| Sleep | 70.6, (6 [5]) | 65.5, (4 [5]) |
| Appetite | 81.9, (8 [8]) | 80.6, (8 [5]) |
Note. CDR = Clinical Dementia Rating Scale (global score); IQR = interquartile range; M = mean; Mdn = median; NPI = Neuropsychiatric Inventory; SD = standard deviation,.
a
Dementia of all causes, living in nursing homes.
b
Year of inclusion in the two cohorts.
c
The frequency of each symptom measured by the neuropsychiatric inventory, multiplied by the severity.