Neuropsychiatric Inventory data in a Belgian sample of elderly persons with and without dementia

Figures & data

Table 1 Demographic and clinical data

	Demented	Non-demented	Statistics
n	223	46	NA
Male/female	36/187	11/35	(χ^2 = 1.60; df = 1; P > 0.05)
Home/institution	34/189	14/32	(χ^2 = 6.00; df = 1; P < 0.01)
Age	83.33 ± 7.23	79.32 ± 7.93	t = 3.37; dl = 267; P < 0.001
CAMCOG	30.9 ± 22.69	80.48 ± 15.17	t = 14.2; dl = 264; P < 0.01
MMSE score (/30)	9.78 ± 7.31	24.71 ± 5.99	t = 13.77; dl = 267; P < 0.001

Notes: Data are given as mean ± SD. For comparison of male-female ratios, Chi-square statistics were used. For all other comparisons, Student’s t-tests were used.

Abbreviations: CAMCOG, cognitive scale of the Revised Cambridge Examination for Mental Disorders of the Elderly (CAMDEX-R); MMSE, Mini Mental State Examination; NA, not applicable.

Table 2 Prevalences of NPI symptoms in groups

NPI symptoms	D group	ND group	Comparative analysis
Delusions	22.87%	6.52%	χ^2 = 6.35; P < 0.05 CC = 0.15
Hallucinations	16.14%	4.35%	χ^2 = 4.37; P < 0.05 CC = 0.12
Depression	27.80%	19.57%	χ^2 = 1.33; P > 0.05 CC = 0.07
Anxiety	23.77%	8.70%	χ^2 = 5.19; P < 0.05 CC = 0.14
Euphoria	11.80%	8.70%	χ^2 = 0.33; P > 0.05 CC = 0.03
Agitation	34.15%	17.39%	χ^2 = 5.18; P < 0.05 CC = 0.14
Apathy	34.98%	10.97%	χ^2 = 10.4; P < 0.01 CC = 0.19
Disinhibition	14.30%	8.70%	χ^2 = 1.05; P > 0.05 CC = 0.06
Irritability	29.15%	17.39%	χ^2 = 2.66; P > 0.05 CC = 0.10
Aberrant motor behavior	21.52%	4.35%	χ^2 = 7.43; P < 0.01 CC = 0.16
Sleeping disorders	15.25%	6.52%	χ^2 = 2.44; P > 0.05 CC = 0.09
Eating disorders	22.87%	6.52%	χ^2 = 6.35; P < 0.05 CC = 0.15

Notes: For prevalence comparisons between groups with and without dementia, Chi-square statistics (χ²) and contingence coefficient (CC) were used. Significant differences are in bold.

Abbreviations: D, demented; ND, non-demented; NPI, Neuropsychiatric Inventory.

Figure 1 Prevalence of any behavioral symptoms in people with dementia.

Figure 2 Prevalence of any behavioral symptoms in people without dementia.