Table 4
Characteristics of visual hallucinations in 21 patients with Parkinson's disease
| Variable | Hallucinators | ||
|---|---|---|---|
| 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 | 76.24-150 | |
| No | 5 | 23.8 | |
| Onset: | |||
| Sudden | 16 | 76.24-150 | |
| Gradual | 5 | 23.8 | |
| Duration: | |||
| Hours | 1 | 4.8 | |
| Minutes | 7 | 33.3 | |
| Seconds | 13 | 61.94-150 | |
| Movement: | |||
| Present | 18 | 85.74-150 | |
| Absent | 3 | 14.3 | |
| Number of images: | |||
| One | 15 | 71.54-150 | |
| One to five | 4 | 19 | |
| More than five | 2 | 9.5 | |
| Clarity: | |||
| Sharp | 3 | 14.3 | |
| Blurry | 11 | 52.44-150 | |
| 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 | 1004-150 | |
| Closed | 0 | 0 | |
| Reality: | |||
| Seemed real | 13 | 61.9 | |
| Seemed unreal | 8 | 38.1 | |
| Lighting: | |||
| Bright | 5 | 23.8 | |
| Dim | 11 | 52.44-150 | |
| 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 | 90.54-150 | |
| 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.
