Table 6. Comparison between earlier RPD series and our study.
| Study group: | No of cases (n) |
Mean age at onset: (n± SD) | Median age (Range): | Symptom duration (median): | M:F | Most common etiology: |
|---|---|---|---|---|---|---|
| Papageorgiou et al.15 (Jan 2004-Dec 2006: RPD<1year) |
68 | 65.5±10.0 | 66.7 (35.3–82.8) | 6.7±3.06 (7) |
37:31 | 1st: S-DEM: NPH 2nd: AD 3rd: FTD |
| Sala et al.16(Oct 1994-Mar 2009: RPD<1 year) | 49 | 72.4±11.6 | NA | 4.6±3.8 | 22:27 | 1st ND: AD 2nd: Prion disease 3rd: vascular and toxic/metabolic |
| Studart Neto et al17 (Mar 2012-Feb 2015: RPD<2years) |
61 | 48±19.6 | (14–84) | 6.4±6.6 | 22:39 | 1st: immune mediated 2nd:infectious disorders 3rd: Prion diseases |
| Our study: (Jan 2008-Aug 2016: RPD<1 year) | 187 | 49.3±18.2 | 50 (13–84) | 5.28±4.1 (4) |
122:65 | 1st: immune mediated 2nd: infectious disorders 3rd: non-prion neurodegenerative: FTD |
SD: standard deviation, F: females, M: males, S-DEM: secondary dementia, NPH: normal pressure hydrocephalus, AD: Alzheimer’s disease, FTD: frontotemporal dementia, ND: neurodegenerative dementias.