Table 4

Characteristics of visual hallucinations in 21 patients with Parkinson's disease

Variable		Hallucinators
Variable		Number	Percentage
Frequency of hallucinations
>5/week	5	23.8
1 to 5/week	8	38.1
<1// week	8	38.1
Form:
Yes	16	76.2^4-150
No	5	23.8
Onset:
Sudden	16	76.2^4-150
Gradual	5	23.8
Duration:
Hours	1	4.8
Minutes	7	33.3
Seconds	13	61.9^4-150
Movement:
Present	18	85.7^4-150
Absent	3	14.3
Number of images:
One	15	71.5^4-150
One to five	4	19
More than five	2	9.5
Clarity:
Sharp	3	14.3
Blurry	11	52.4^4-150
Transparent	2	9.5
Variable	5	23.8
Perceived control:
Have control	7	33.3
No control	14	66.7
Colour:
Black and white	7	33.3
Single colour	6	28.6
Multiple colours	8	38.1
Eyelids:
Open	21	100^4-150
Closed	0	0
Reality:
Seemed real	13	61.9
Seemed unreal	8	38.1
Lighting:
Bright	5	23.8
Dim	11	52.4^4-150
Dark	3	14.3
All conditions	2	9.5
Trigger:
Starts with percept	12	57.1
Starts independently	9	42.9
Medication related:
Yes	5	23.8
No	16	76.2
Content:
Stereotyped	7	33.3
Different	14	66.6
Field of vision:
Complete	2	9.5
Partial	19	90.5^4-150
Distortion of image:
Present	8	38.1
Absent	13	61.9

↵4-150 χ²; significant difference in distribution of responses from chance, p<0.05.