Table 2.
Frequency of change in diagnosis in relation to number of time points seen
| Diagnostic changes from time point 1 to 2 | ||||||
|---|---|---|---|---|---|---|
| Diagnosis at time point 1 | Change to other neurodegenerative syndrome | Change to non-neurodegenerative disease | Change reflecting development or specificity | |||
| n | % | n | % | n | % | |
| bvFTD, n=99 | 18 | 18.1% | 5 | 5.1% | 2 | 6.3% |
| AD-type dementia, n=49 | 3 | 6.1% | 1 | 2% | 7 | 14.3% |
| CBS, n=40 | 6 | 15% | 2 | 5% | 2 | 5% |
| Diagnostic changes in those seen at 3+ time points | ||||||||
|---|---|---|---|---|---|---|---|---|
| Diagnosis at time point 1 | No change in diagnosis | Changed at time point 2, then stable | Changed at time point 2 and again later | Same at time point 2, then changed | ||||
| n | % | n | % | n | % | n | % | |
| bvFTD, n=43 | 27 | 62.8% | 4 | 9.3% | 5 | 11.6% | 7 | 16.3% |
| AD-type dementia, n=19 | 10 | 52.6% | 2 | 10.5% | 3 | 15.8% | 4 | 21.1% |
| CBS, n=16 | 7 | 43.8% | 3 | 18.8% | 1 | 6.3% | 5 | 31.3% |
| Diagnostic changes in those seen at 4+ time points | ||||||||
| Diagnosis at time point 1 | No change in diagnosis | Changed time point 2 or 3, then stable | Changed at time point 2 or 3 and again later | Same at time point 2 or 3, then changed | ||||
|---|---|---|---|---|---|---|---|---|
| n | % | n | % | n | % | n | % | |
| bvFTD, n=19 | 11 | 57.9% | 2 | 10.5% | 3 | 15.8% | 3 | 15.8% |
| AD-type dementia, n=7 | 3 | 42.9% | 3 | 42.9% | 1 | 14.3% | 0 | 0% |
| CBS, n=2 | 0 | 0% | 1 | 50% | 0 | 0% | 1 | 50% |