Table 1. General characteristics of registered interventional trials studying exclusively elderly persons.
| Characteristic | Trials studying exclusively elderly persons, N = 1,112 |
|---|---|
| Intervention type, N (%) | |
| Drug | 368 (33.1) |
| Device | 87 (7.8) |
| Behavioral | 195 (17.5) |
| Procedure | 70 (6.3) |
| Biologic | 78 (7.0) |
| Dietary supplement | 108 (9.7) |
| Radiation | 7 (0.6) |
| Genetic | 1 (0.1) |
| Other | 198 (17.8) |
| Primary Purpose, N (%) | |
| Treatment | 579 (52.1) |
| Prevention | 264 (41.1) |
| Supportive care | 64 (5.8) |
| Health services research | 57 (5.1) |
| Diagnostic/screening | 42 (3.8) |
| Basic science | 29 (2.6) |
| Not stated | 75 (6.8) |
| Primary Funding Source, N (%) | |
| Industry | 210 (18.9) |
| Non-industry | 902 (81.1) |
| Start Year, N (%) | |
| 2006–2007 | 204 (18.5) |
| 2008–2009 | 248 (22.3) |
| 2010–2011 | 307 (27.6) |
| 2012–2014 | 353 (31.7) |