Table 1.
Characteristics of included records
| n (%) | |
|---|---|
| Source | |
| Peer-reviewed publications | 630 (78) |
| Unpublished | 128 (16) |
| Conference abstracts | 47 (6) |
| Intervention | |
| Pharmacological | 487 (60) |
| Non-pharmacological | 311 (39) |
| Both | 7 (1) |
| Registration/publication | |
| 2004 | 40 (5) |
| 2005 | 54 (7) |
| 2006 | 68 (8) |
| 2007 | 79 (10) |
| 2008 | 99 (12) |
| 2009 | 125 (16) |
| 2010 | 68 (8) |
| 2011 | 96 (12) |
| 2012 | 59 (7) |
| 2013 | 80 (10) |
| 2014 | 33 (4) |
| 2015a | 4 (0.5) |
| Region | |
| Asia | 133 (17) |
| Australasia | 27 (3) |
| Europe | 249 (31) |
| Internationalb | 46 (6) |
| Middle East | 11 (1) |
| North America | 231 (29) |
| Russia | 13 (2) |
| South America | 16 (2) |
| Unclear | 79 (10) |
| Dementia subtype | |
| Alzheimer’s disease | 398 (49) |
| Dementia (unspecified) | 158 (20) |
| Dementia and mild cognitive impairment | 30 (4) |
| Frontotemporal dementia | 11 (1) |
| Mild cognitive impairment | 123 (15) |
| Mixedc | 39 (5) |
| Parkinson’s disease dementia/dementia with Lewy bodies | 22 (3) |
| Vascular dementia | 24 (3) |
| Journal of publication (n = 630) | |
| Old age psychiatry & dementia | 195 (31) |
| Geriatric medicine & gerontology | 110 (17) |
| Neurology & neuroscience | 95 (15) |
| General medicine | 47 (7) |
| Pharmacology | 44 (7) |
| Complementary & alternative medicine | 27 (4) |
| Psychiatry | 22 (3) |
| Rehabilitation | 20 (3) |
| Nursing | 18 (3) |
| Nutrition | 9 (1) |
| Psychology | 8 (1) |
| Other | 35 (6) |
All percentages are rounded to nearest whole number
aDenotes study published in 2015 but registered in period of interest
bInternational defined as study sites in more than two regions
cStudy included those with more than one specific dementia subtype