Table 2.
Causes for intra-rater (a) and inter-rater (b) disagreement
| a | ||
|---|---|---|
| PVS site | Description | n (%) |
| Centrum semiovale (n = 20) | Asymmetric/focally dilated PVS | 1 (5) |
| WMH presenta | 7 (35) | |
| No WMH presentb | 11 (55) | |
| Movement artefact | 1 (5) | |
| Basal ganglia (n = 8) | Rating 2 versus 3, no clear cause for disagreement | 6 (75) |
| Unilateral old large cortical infarct | 1 (12.5) | |
| Multiple possible lacunes bilaterally | 1 (12.5) | |
a
1-point different in scale, n = 4; 2-point difference, n = 2; 3-point difference, n = 1. WMH confluent (n = 5) or scattered (n = 2).
b
1-point difference in rating in 10/11 cases.